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Merge branch 'OpenHarmony-3.1-Release' of gitee.com:openharmony/docs into OpenHarmony-3.1-Release 

Signed-off-by: N田雨 <tianyu55@huawei.com>
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en/application-dev/ability/ability-brief.md
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An ability is the abstraction of a functionality that an application can provide. It is the minimum unit for the system to schedule applications. An application can contain one or more `Ability` instances. An ability is the abstraction of a functionality that an application can provide. It is the minimum unit for the system to schedule applications. An application can contain one or more `Ability` instances.
The ability framework model has two forms. The ability framework model has two forms:
- FA model, which applies to application development using API version 8 and earlier versions. In the FA model, there are Feature Ability (FA) and Particle Ability (PA). The FA supports Page abilities, and the PA supports Service, Data, and Form abilities. - FA model, which applies to application development using API version 8 and earlier versions. In the FA model, there is Feature Ability (FA) and Particle Ability (PA). The FA supports Page abilities, and the PA supports Service, Data, and Form abilities.
- Stage model, which is introduced since API version 9. In the stage model, there are Ability and ExtensionAbility. The ExtensionAbility is further extended to ServiceExtensionAbility, FormExtensionAbility, DataShareExtensionAbility, and more. - Stage model, which is introduced since API version 9. In the stage model, there is `Ability` and `ExtensionAbility`. `ExtensionAbility` is further extended to `ServiceExtensionAbility`, `FormExtensionAbility`, `DataShareExtensionAbility`, and more.
The stage model is designed to make it easier to develop complex applications in the distributed environment. The table below lists the design differences between the two models. The stage model is designed to make it easier to develop complex applications in the distributed environment. The table below lists the design differences between the two models.
| Item | FA Model | Stage Model | | Item | FA Model | Stage Model |
| -------------- | ------------------------------------------------------------ | -------------------------------------------------------- | | -------------- | ------------------------------------------------------------ | -------------------------------------------------------- |
| Development mode | Web-like APIs are provided. The UI development is the same as that of the stage model. | Object-oriented development mode is provided. The UI development is the same as that of the FA model. | | Development mode | Web-like APIs are provided. The UI development is the same as that of the stage model. | Object-oriented development mode is provided. The UI development is the same as that of the FA model. |
| Engine instance | Each ability in a process exclusively uses a JS VM engine instance. | Multiple abilities in a process share one JS VM engine instance. | | Engine instance | Each ability in a process exclusively uses a JS VM engine instance. | Multiple abilities in a process share one JS VM engine instance. |
| Intra-process object sharing| Not supported. | Supported. | | Intra-process object sharing| Not supported. | Supported. |
| Bundle description file | The `config.json` file is used to describe the HAP and component information. Each component must use a fixed file name.| The `module.json` file is used to describe the HAP and component information. The entry file name can be specified.| | Bundle description file | The `config.json` file is used to describe the HAP and component information. Each component must use a fixed file name.| The `module.json5` file is used to describe the HAP and component information. The entry file name can be specified.|
| Component | Four types of components are provided: Page ability (used for UI page display), Service ability (used to provide services), Data ability (used for data sharing), and Form ability (used to provide widgets).| Two types of components are provided: Ability (used for UI page display) and Extension (scenario-based service extension). | | Component | Four types of components are provided: Page ability (used for UI page display), Service ability (used to provide services), Data ability (used for data sharing), and Form ability (used to provide widgets).| Two types of components are provided: Ability (used for UI page display) and Extension (scenario-based service extension). |
In addition, the following differences exist in the development process: In addition, the following differences exist in the development process:
...@@ -27,5 +27,4 @@ In addition, the following differences exist in the development process: ...@@ -27,5 +27,4 @@ In addition, the following differences exist in the development process:
![lifecycle](figures/lifecycle.png) ![lifecycle](figures/lifecycle.png)
For details about the two models, see [FA Model Overview](fa-brief.md) and [Stage Model Overview](stage-brief.md). For details about the two models, see [FA Model Overview](fa-brief.md) and [Stage Model Overview](stage-brief.md).
en/application-dev/ability/stage-ability.md
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# Ability Development # Ability Development
## When to Use ## When to Use
Ability development in the [stage model](stage-brief.md) is significantly different from that in the FA model. The stage model requires you to declare the application package structure in the `module.json` and `app.json` files during application development. For details about the configuration file, see [Application Package Structure Configuration File](../quick-start/stage-structure.md). To develop an ability based on the stage model, implement the following logic: Ability development in the [stage model](stage-brief.md) is significantly different from that in the FA model. The stage model requires you to declare the application package structure in the `module.json5` and `app.json5` files during application development. For details about the configuration file, see [Application Package Structure Configuration File](../quick-start/stage-structure.md). To develop an ability based on the stage model, implement the following logic:
- Create an ability that supports screen viewing and human-machine interaction. You must implement the following scenarios: ability lifecycle callbacks, obtaining ability configuration, requesting permissions, and notifying environment changes. - Create an ability that supports screen viewing and human-machine interaction. You must implement the following scenarios: ability lifecycle callbacks, obtaining ability configuration, requesting permissions, and notifying environment changes.
- Start an ability. You need to implement ability startup on the same device, on a remote device, or with a specified UI page. - Start an ability. You need to implement ability startup on the same device, on a remote device, or with a specified UI page.
- Call abilities. For details, see [Call Development](stage-call.md). - Call abilities. For details, see [Call Development](stage-call.md).
...@@ -8,7 +8,7 @@ Ability development in the [stage model](stage-brief.md) is significantly differ ...@@ -8,7 +8,7 @@ Ability development in the [stage model](stage-brief.md) is significantly differ
- Continue the ability on another device. For details, see [Ability Continuation Development](stage-ability-continuation.md). - Continue the ability on another device. For details, see [Ability Continuation Development](stage-ability-continuation.md).
### Launch Type ### Launch Type
An ability can be launched in the **standard**, **singleton**, or **specified** mode, as configured by `launchType` in the `module.json` file. Depending on the launch type, the action performed when the ability is started differs, as described below. An ability can be launched in the **standard**, **singleton**, or **specified** mode, as configured by `launchType` in the `module.json5` file. Depending on the launch type, the action performed when the ability is started differs, as described below.
| Launch Type | Description |Action | | Launch Type | Description |Action |
| ----------- | ------- |---------------- | | ----------- | ------- |---------------- |
...@@ -16,7 +16,7 @@ An ability can be launched in the **standard**, **singleton**, or **specified** ...@@ -16,7 +16,7 @@ An ability can be launched in the **standard**, **singleton**, or **specified**
| singleton | Singleton | The ability has only one instance in the system. If an instance already exists when an ability is started, that instance is reused.| | singleton | Singleton | The ability has only one instance in the system. If an instance already exists when an ability is started, that instance is reused.|
| specified | Instance-specific| The internal service of an ability determines whether to create multiple instances during running.| | specified | Instance-specific| The internal service of an ability determines whether to create multiple instances during running.|
By default, the singleton mode is used. The following is an example of the `module.json` file: By default, the singleton mode is used. The following is an example of the `module.json5` file:
```json ```json
{ {
"module": { "module": {
...@@ -42,6 +42,7 @@ The table below describes the APIs provided by the `AbilityStage` class, which h ...@@ -42,6 +42,7 @@ The table below describes the APIs provided by the `AbilityStage` class, which h
The table below describes the APIs provided by the `Ability` class. For details about the APIs, see [Ability](../reference/apis/js-apis-application-ability.md). The table below describes the APIs provided by the `Ability` class. For details about the APIs, see [Ability](../reference/apis/js-apis-application-ability.md).
**Table 2** Ability APIs **Table 2** Ability APIs
|API|Description| |API|Description|
|:------|:------| |:------|:------|
|onCreate(want: Want, param: AbilityConstant.LaunchParam): void|Called when an ability is created.| |onCreate(want: Want, param: AbilityConstant.LaunchParam): void|Called when an ability is created.|
...@@ -107,7 +108,10 @@ To create Page abilities for an application in the stage model, you must impleme ...@@ -107,7 +108,10 @@ To create Page abilities for an application in the stage model, you must impleme
} }
``` ```
### Obtaining AbilityStage and Ability Configurations ### Obtaining AbilityStage and Ability Configurations
Both the `AbilityStage` and `Ability` classes have the `context` attribute. An application can obtain the context of an `Ability` instance through `this.context` to obtain the configuration details. The following example shows how an application obtains the bundle code directory, HAP file name, ability name, and system language through the `context` attribute in the `AbilityStage` class. The sample code is as follows: Both the `AbilityStage` and `Ability` classes have the `context` attribute. An application can obtain the context of an `Ability` instance through `this.context` to obtain the configuration details.
The following example shows how an application obtains the bundle code directory, HAP file name, ability name, and system language through the `context` attribute in the `AbilityStage` class. The sample code is as follows:
```ts ```ts
import AbilityStage from "@ohos.application.AbilityStage" import AbilityStage from "@ohos.application.AbilityStage"
export default class MyAbilityStage extends AbilityStage { export default class MyAbilityStage extends AbilityStage {
...@@ -145,9 +149,9 @@ export default class MainAbility extends Ability { ...@@ -145,9 +149,9 @@ export default class MainAbility extends Ability {
} }
``` ```
### Requesting Permissions ### Requesting Permissions
If an application needs to obtain user privacy information or use system capabilities, for example, obtaining location information or using the camera to take photos or record videos, it must request the respective permission from consumers. During application development, you need to specify the involved sensitive permissions, declare the required permissions in `module.json`, and use the `requestPermissionsFromUser` API to request the permission from consumers in the form of a dialog box. The following uses the permission for calendar access as an example. If an application needs to obtain user privacy information or use system capabilities, for example, obtaining location information or using the camera to take photos or record videos, it must request the respective permission from consumers. During application development, you need to specify the involved sensitive permissions, declare the required permissions in `module.json5`, and use the `requestPermissionsFromUser` API to request the permission from consumers in the form of a dialog box. The following uses the permission for calendar access as an example.
Declare the required permission in the `module.json` file. Declare the required permission in the `module.json5` file.
```json ```json
"requestPermissions": [ "requestPermissions": [
{ {
...@@ -269,7 +273,7 @@ function getRemoteDeviceId() { ...@@ -269,7 +273,7 @@ function getRemoteDeviceId() {
``` ```
Request the permission `ohos.permission.DISTRIBUTED_DATASYNC` from consumers. This permission is used for data synchronization. For details about the sample code for requesting the permission, see [Requesting Permissions](##requesting-permissions). Request the permission `ohos.permission.DISTRIBUTED_DATASYNC` from consumers. This permission is used for data synchronization. For details about the sample code for requesting the permission, see [Requesting Permissions](##requesting-permissions).
### Starting an Ability with the Specified Page ### Starting an Ability with the Specified Page
If the launch type of an ability is set to `singleton` and the ability has been started, the `onNewWant` callback rather than the `onCreate` callback is triggered when the ability is started again. You can pass start options through the `want`. For example, to start an ability with the specified page, use the `uri` or `parameters` parameter in the `want` to pass the page information. Currently, the ability in the stage model cannot directly use the `router` capability. You must pass the start options to the custom component and invoke the `router` method to display the specified page during the custom component lifecycle management. The sample code is as follows: If the launch type of an ability is set to `singleton` and the ability has been started, the `onNewWant` callback is triggered when the ability is started again. You can pass start options through the `want`. For example, to start an ability with the specified page, use the `uri` or `parameters` parameter in the `want` to pass the page information. Currently, the ability in the stage model cannot directly use the `router` capability. You must pass the start options to the custom component and invoke the `router` method to display the specified page during the custom component lifecycle management. The sample code is as follows:
When using `startAbility` to start an ability again, use the `uri` parameter in the `want` to pass the page information. When using `startAbility` to start an ability again, use the `uri` parameter in the `want` to pass the page information.
```ts ```ts
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en/application-dev/ability/stage-serviceextension.md
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2. Register the Service Extension ability. 2. Register the Service Extension ability.
Declare the Service Extension ability in the **module.json** file by setting its **type** attribute to **service**. Declare the Service Extension ability in the **module.json5** file by setting its **type** attribute to **service**.
**module.json configuration example** **module.json5 configuration example**
```json ```json
"extensionAbilities":[{ "extensionAbilities":[{
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en/application-dev/database/database-mdds-overview.md
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# Distributed Data Service Overview<a name="EN-US_TOPIC_0000001183067628"></a> # Distributed Data Service Overview
The distributed data service \(DDS\) implements distributed database collaboration across devices for applications. Applications save data to distributed databases by calling the DDS APIs. The DDS isolates data of different applications based on a triplet of account, application, and database to ensure secure data access. The DDS synchronizes application data between trusted devices to provide users with consistent data access experience on different devices. The distributed data service (DDS) implements distributed database collaboration across devices for applications.
## Basic Concepts<a name="section17506141102520"></a> Applications save data to distributed databases by calling the DDS APIs. The DDS isolates data of different applications based on a triplet of account, application, and database to ensure secure data access. The DDS synchronizes application data between trusted devices to provide users with consistent data access experience on different devices.
You do not need to care about the implementation of the database locking mechanism.
## Basic Concepts
- **KV data model** - **KV data model**
...@@ -54,7 +58,7 @@ The distributed data service \(DDS\) implements distributed database collaborati ...@@ -54,7 +58,7 @@ The distributed data service \(DDS\) implements distributed database collaborati
The DDS provides the database backup capability. You can set **backup** to **true** to enable daily backup. If a distributed database is damaged, the DDS deletes the database and restores the most recent data from the backup database. If no backup database is available, the DDS creates one. The DDS can also back up encrypted databases. The DDS provides the database backup capability. You can set **backup** to **true** to enable daily backup. If a distributed database is damaged, the DDS deletes the database and restores the most recent data from the backup database. If no backup database is available, the DDS creates one. The DDS can also back up encrypted databases.
## Working Principles<a name="section315111581616"></a> ## Working Principles
The DDS supports distributed management of application database data in the OpenHarmony system. Data can be synchronized between multiple devices with the same account, delivering a consistent user experience across devices. The DDS consists of the following: The DDS supports distributed management of application database data in the OpenHarmony system. Data can be synchronized between multiple devices with the same account, delivering a consistent user experience across devices. The DDS consists of the following:
...@@ -86,7 +90,7 @@ Applications call the DDS APIs to create, access, and subscribe to distributed d ...@@ -86,7 +90,7 @@ Applications call the DDS APIs to create, access, and subscribe to distributed d
![](figures/en-us_image_0000001183386164.png) ![](figures/en-us_image_0000001183386164.png)
## Constraints<a name="section95382010203311"></a> ## Constraints
- The DDS supports the KV data model only. It does not support foreign keys or triggers of the relational database. - The DDS supports the KV data model only. It does not support foreign keys or triggers of the relational database.
- The KV data model specifications supported by the DDS are as follows: - The KV data model specifications supported by the DDS are as follows:
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en/application-dev/database/database-relational-guidelines.md
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## When to Use ## When to Use
A relational database (RDB) store allows you to operate local data with or without native SQL statements based on SQLite. A relational database (RDB) store allows you to manage local data with or without native SQL statements based on SQLite.
## Available APIs ## Available APIs
...@@ -21,11 +21,11 @@ The table below describes the APIs available for creating and deleting an RDB st ...@@ -21,11 +21,11 @@ The table below describes the APIs available for creating and deleting an RDB st
### Managing Data in an RDB Store ### Managing Data in an RDB Store
The RDB provides APIs for inserting, deleting, updating, and querying data in the local RDB store. The **RDB** module provides APIs for inserting, deleting, updating, and querying data in a local RDB store.
- **Inserting Data** - **Inserting Data**
The RDB provides APIs for inserting data through a **ValuesBucket** in a data table. If the data is inserted, the row ID of the data inserted will be returned; otherwise, **-1** will be returned. The **RDB** module provides APIs for inserting data through a **ValuesBucket** in a data table. If the data is inserted, the row ID of the data inserted will be returned; otherwise, **-1** will be returned.
**Table 2** API for inserting data **Table 2** API for inserting data
...@@ -41,7 +41,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th ...@@ -41,7 +41,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
| Class| API| Description| | Class| API| Description|
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | update(values:ValuesBucket,rdbPredicates:RdbPredicates):Promise\<number> | Updates data based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **values**: data to update, which is stored in **ValuesBucket**.<br>- **rdbPredicates**: conditions for updating data. | | RdbStore | update(values:ValuesBucket,rdbPredicates:RdbPredicates):Promise\<number> | Updates data based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **values**: data to update, which is stored in **ValuesBucket**.<br>- **rdbPredicates**: conditions for updating data.|
- **Deleting Data** - **Deleting Data**
...@@ -51,7 +51,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th ...@@ -51,7 +51,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
| Class| API| Description| | Class| API| Description|
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | delete(rdbPredicates:RdbPredicates):Promise\<number> | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **rdbPredicates**: conditions for deleting data. | | RdbStore | delete(rdbPredicates:RdbPredicates):Promise\<number> | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **rdbPredicates**: conditions for deleting data.|
- **Querying data** - **Querying data**
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### Using Predicates ### Using Predicates
The RDB provides **RdbPredicates** for you to set database operation conditions. The **RDB** module provides **RdbPredicates** for you to set database operation conditions.
The following lists common predicates. For more information about predicates, see [**RdbPredicates**](../reference/apis/js-apis-data-rdb.md#rdbpredicates). The table below lists common predicates. For more information about predicates, see [**RdbPredicates**](../reference/apis/js-apis-data-rdb.md#rdbpredicates).
**Table 6** APIs for using RDB store predicates **Table 6** APIs for using RDB store predicates
| Class| API| Description| | Class| API| Description|
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbPredicates | equalTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** to match the field with data type **ValueType** and value equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. | | RdbPredicates | equalTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** object to match the field with data type **ValueType** and value equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
| RdbPredicates | notEqualTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** to match the field with data type **ValueType** and value not equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. | | RdbPredicates | notEqualTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** object to match the field with data type **ValueType** and value not equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
| RdbPredicates | or():RdbPredicates | Adds the OR condition to the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** with the OR condition.| | RdbPredicates | or():RdbPredicates | Adds the OR condition to the **RdbPredicates** object.<br>- **RdbPredicates**: **RdbPredicates** with the OR condition.|
| RdbPredicates | and():RdbPredicates | Adds the AND condition to the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** with the AND condition.| | RdbPredicates | and():RdbPredicates | Adds the AND condition to the **RdbPredicates** object.<br>- **RdbPredicates**: **RdbPredicates** with the AND condition.|
| RdbPredicates | contains(field:string,value:string):RdbPredicats | Sets an **RdbPredicates** to match a string that contains the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. | | RdbPredicates | contains(field:string,value:string):RdbPredicats | Sets an **RdbPredicates** object to match a string that contains the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
### Using the Result Set ### Using the Result Set
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en/application-dev/database/database-relational-overview.md
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# RDB Overview<a name="EN-US_TOPIC_0000001231030607"></a> # RDB Overview
The relational database \(RDB\) manages data based on relational models. With the underlying SQLite database, the RDB provides a complete mechanism for managing local databases. To satisfy different needs in complicated scenarios, the RDB offers a series of methods for performing operations such as adding, deleting, modifying, and querying data, and supports direct execution of SQL statements. The relational database (RDB) manages data based on relational models. With the underlying SQLite database, the RDB provides a complete mechanism for managing local databases. To satisfy different needs in complicated scenarios, the RDB offers a series of methods for performing operations such as adding, deleting, modifying, and querying data, and supports direct execution of SQL statements.
## Basic Concepts<a name="section1063573420813"></a> You do not need to care about the implementation of the database locking mechanism.
- **RDB** ## Basic concepts
A type of database based on the relational model of data. The RDB stores data in rows and columns. An RDB is also called RDB store. - **RDB**
- **Predicate** A type of database created on the basis of relational models. The RDB stores data in rows and columns. A RDB is also called RDB store.
A representation of the property or feature of a data entity, or the relationship between data entities. It is mainly used to define operation conditions. - **Predicate**
- **Result set** A representation of the property or feature of a data entity, or the relationship between data entities. It is mainly used to define operation conditions.
A set of query results used to access the data. You can access the required data in a result set in flexible modes. - **Result set**
- **SQLite database** A set of query results used to access data. You can access the required data in a result set in flexible modes.
A lightweight open-source relational database management system that complies with Atomicity, Consistency, Isolation, and Durability \(ACID\). - **SQLite database**
A lightweight open-source relational database management system that complies with Atomicity, Consistency, Isolation, and Durability (ACID).
## Working Principles<a name="section4810552814"></a> ## Working Principles
The RDB provides a common operation interface for external systems. It uses the SQLite as the underlying persistent storage engine, which supports all SQLite database features. The RDB provides common operation APIs for external systems. It uses the SQLite as the underlying persistent storage engine, which supports all SQLite database features.
**Figure 1** How RDB works<a name="fig1826214361535"></a> **Figure 1** How RDB works
![](figures/how-rdb-works.png "how-rdb-works")
## Default Settings<a name="section176091243121218"></a> ![how-rdb-works](figures/how-rdb-works.png)
- The default database logging mode is write-ahead logging \(WAL\). ## Default Settings
- The default database flush mode is Full mode.
- The default shared memory used by the OpenHarmony database is 2 MB.
## Constraints<a name="section929813398308"></a> - The default RDB logging mode is Write Ahead Log (WAL).
- The default data flushing mode is **FULL** mode.
- The default size of the shared memory used by an OpenHarmony database is 2 MB.
- A maximum of four connection pools can be connected to an RDB to manage read and write operations. ## Constraints
- To ensure data accuracy, the RDB supports only one write operation at a time. - A maximum of four connection pools can be connected to an RDB to manage read and write operations.
- To ensure data accuracy, the RDB supports only one write operation at a time.
en/application-dev/database/database-storage-overview.md
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# Lightweight Data Store Overview<a name="EN-US_TOPIC_0000001230752103"></a> # Lightweight Data Store Overview
Lightweight data store is applicable to access and persistence operations on the data in key-value pairs. When an application accesses a lightweight **Storage** instance, data in the **Storage** instance will be cached in the memory for faster access. The cached data can also be written back to the text file for persistent storage. Since file read and write consume system resources, you are advised to minimize the frequency of reading and writing persistent files. The lightweight data store is applicable to access and persistence of data in the key-value structure.
## Basic Concepts<a name="section1055404171115"></a> After an application obtains a lightweight store instance, the data in the instance will be cached in the memory for faster access. The cached data can also be written back to the text file for persistent storage. Since file read and write consume system resources, you are advised to minimize the frequency of reading and writing persistent files.
- **Key-Value data structure** You do not need to care about the implementation of the database lock mechanism.
A type of data structure. The key is the unique identifier for a piece of data, and the value is the specific data being identified. ## Basic Concepts
- **Non-relational database** - **Key-value structure**
A database not in compliance with the atomicity, consistency, isolation, and durability \(ACID\) database management properties of relational data transactions. The data in a non-relational database is independent. A type of data structure. The key is the unique identifier for a piece of data, and the value is the specific data being identified.
- **Non-relational database**
## Working Principles<a name="section682631371115"></a> A database not in compliance with the atomicity, consistency, isolation, and durability (ACID) properties of relational data transactions. The data in a non-relational database is independent.
1. When an application loads data from a specified **Storage** file to a **Storage** instance, the system stores the instance in the memory through a static container. Each file of an application or process has only one **Storage** instance in the memory, till the application removes the instance from the memory or deletes the **Storage** file. ## Working Principles
2. When obtaining a **Storage** instance, the application can read data from or write data to the instance. The data in the **Storage** instance can be flushed to its **Storage** file by calling the **flush** or **flushSync** method.
**Figure 1** How lightweight data store works<a name="fig1657785713509"></a> 1. An application can load data from a specified **Storage** file to a **Storage** instance. The system stores the instance in the memory through a static container. Each file of an application or process has only one **Storage** instance in the memory, till the application removes the instance from the memory or deletes the **Storage** file.
2. When obtaining a **Storage** instance, the application can read data from or write data to the instance. The data in the **Storage** instance can be flushed to its **Storage** file by calling the **flush** or **flushSync** method.
**Figure 1** Working mechanism
![](figures/en-us_image_0000001199139454.png) ![](figures/en-us_image_0000001199139454.png)
## Constraints<a name="section17243172883219"></a> ## Constraints
- **Storage** instances are loaded to the memory. To minimize non-memory overhead, the number of data records stored in a **Storage** instance cannot exceed 10,000. Delete the instances that are no longer used in a timely manner.
- The key in the key-value pairs is of the string type. It cannot be empty or exceed 80 characters.
- If the value in the key-value pairs is of the string type, it can be empty or contain a maximum of 8192 characters.
- **Storage** instances are loaded to the memory. To minimize non-memory overhead, the number of data records stored in a **Storage** instance cannot exceed 10,000. Delete the instances that are no longer used in a timely manner.
- The key in the key-value pairs is of the string type. It cannot be empty or exceed 80 bytes.
- The value of the string type can be empty, but cannot exceed 8192 bytes if not empty.
en/application-dev/reference/apis/js-apis-display.md
浏览文件 @ 3bc24b2e
# Display # Display
Provides APIs for managing displays, such as obtaining information about the default display, obtaining information about all displays, and listening for the addition and removal of displays. The **Display** module provides APIs for managing displays, such as obtaining information about the default display, obtaining information about all displays, and listening for the addition and removal of displays.
> **NOTE** > **NOTE**
> >
...@@ -14,11 +14,11 @@ import display from '@ohos.display'; ...@@ -14,11 +14,11 @@ import display from '@ohos.display';
## DisplayState ## DisplayState
Provides the state of a display. Enumerates the display states.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
| Name| Default Value| Description| | Name| Value| Description|
| -------- | -------- | -------- | | -------- | -------- | -------- |
| STATE_UNKNOWN | 0 | Unknown.| | STATE_UNKNOWN | 0 | Unknown.|
| STATE_OFF | 1 | The display is shut down.| | STATE_OFF | 1 | The display is shut down.|
...@@ -35,163 +35,169 @@ Describes the attributes of a display. ...@@ -35,163 +35,169 @@ Describes the attributes of a display.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
| Name| Type| Readable| Writable| Description| | Name | Type | Readable | Writable | Description |
| -------- | -------- | -------- | -------- | -------- | | ------------- | ----------------------------- | -------- | -------- | ------------------------------------------------------------ |
| id | number | Yes| No| ID of the display.| | id | number | Yes | No | ID of the display. |
| name | string | Yes| No| Name of the display.| | name | string | Yes | No | Name of the display. |
| alive | boolean | Yes| No| Whether the display is alive.| | alive | boolean | Yes | No | Whether the display is alive. |
| state | [DisplayState](#displaystate) | Yes| No| State of the display.| | state | [DisplayState](#displaystate) | Yes | No | State of the display. |
| refreshRate | number | Yes| No| Refresh rate of the display.| | refreshRate | number | Yes | No | Refresh rate of the display. |
| rotation | number | Yes| No| Screen rotation angle of the display.| | rotation | number | Yes | No | Screen rotation angle of the display. |
| width | number | Yes| No| Width of the display, in pixels.| | width | number | Yes | No | Width of the display, in pixels. |
| height | number | Yes| No| Height of the display, in pixels.| | height | number | Yes | No | Height of the display, in pixels. |
| densityDPI | number | Yes| No| Screen density of the display, in DPI.| | densityDPI | number | Yes | No | Screen density of the display, in DPI. |
| densityPixels | number | Yes| No| Screen density of the display, in pixels.| | densityPixels | number | Yes | No | Screen density of the display, in pixels. |
| scaledDensity | number | Yes| No| Scaling factor for fonts displayed on the display.| | scaledDensity | number | Yes | No | Scaling factor for fonts displayed on the display. |
| xDPI | number | Yes| No| Exact physical dots per inch of the screen in the horizontal direction.| | xDPI | number | Yes | No | Exact physical dots per inch of the screen in the horizontal direction. |
| yDPI | number | Yes| No| Exact physical dots per inch of the screen in the vertical direction.| | yDPI | number | Yes | No | Exact physical dots per inch of the screen in the vertical direction. |
## display.getDefaultDisplay ## display.getDefaultDisplay
getDefaultDisplay(callback: AsyncCallback&lt;Display&gt;): void getDefaultDisplay(callback: AsyncCallback&lt;Display&gt;): void
Obtains the default display object. Obtains the default display object. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Parameters** **Parameters**
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- | | Name| Type| Mandatory| Description|
| callback | AsyncCallback&lt;[Display](#display)&gt; | Yes| Callback used to return the default display object.| | -------- | -------- | -------- | -------- |
| callback | AsyncCallback&lt;[Display](#display)&gt; | Yes| Callback used to return the default display object.|
**Example** **Example**
```js
var displayClass = null; ```js
display.getDefaultDisplay((err, data) => { var displayClass = null;
if (err.code) { display.getDefaultDisplay((err, data) => {
console.error('Failed to obtain the default display object. Code: ' + JSON.stringify(err)); if (err.code) {
return; console.error('Failed to obtain the default display object. Code: ' + JSON.stringify(err));
} return;
console.info('Succeeded in obtaining the default display object. Data:' + JSON.stringify(data)); }
displayClass = data; console.info('Succeeded in obtaining the default display object. Data:' + JSON.stringify(data));
}); displayClass = data;
``` });
```
## display.getDefaultDisplay ## display.getDefaultDisplay
getDefaultDisplay(): Promise&lt;Display&gt; getDefaultDisplay(): Promise&lt;Display&gt;
Obtains the default display object. Obtains the default display object. This API uses a promise to return the result.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Return value** **Return value**
| Type | Description | | Type | Description |
| ---------------------------------- | ---------------------------------------------- | | ---------------------------------- | ---------------------------------------------- |
| Promise&lt;[Display](#display)&gt; | Promise used to return the default display object.| | Promise&lt;[Display](#display)&gt; | Promise used to return the default display object.|
**Example** **Example**
```js ```js
let promise = display.getDefaultDisplay(); var displayClass = null;
promise.then(() => { let promise = display.getDefaultDisplay();
console.log('getDefaultDisplay success'); promise.then((data) => {
}).catch((err) => { displayClass = data;
console.log('getDefaultDisplay fail: ' + JSON.stringify(err)); console.info('Succeeded in obtaining the default display object. Data:' + JSON.stringify(data));
}); }).catch((err) => {
``` console.error('Failed to obtain the default display object. Code: ' + JSON.stringify(err));
});
```
## display.getAllDisplay ## display.getAllDisplay
getAllDisplay(callback: AsyncCallback&lt;Array&lt;Display&gt;&gt;): void getAllDisplay(callback: AsyncCallback&lt;Array&lt;Display&gt;&gt;): void
Obtains all the display objects. Obtains all display objects. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Parameters** **Parameters**
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | ---------------------------------------------------- | ---- | ------------------------------- | | -------- | ---------------------------------------------------- | ---- | ------------------------------- |
| callback | AsyncCallback&lt;Array&lt;[Display](#display)&gt;&gt; | Yes | Callback used to return all the display objects.| | callback | AsyncCallback&lt;Array&lt;[Display](#display)&gt;&gt; | Yes | Callback used to return all the display objects.|
**Example** **Example**
```js ```js
display.getAllDisplay((err, data) => { display.getAllDisplay((err, data) => {
if (err.code) { if (err.code) {
console.error('Failed to obtain all the display objects. Code: ' + JSON.stringify(err)); console.error('Failed to obtain all the display objects. Code: ' + JSON.stringify(err));
return; return;
} }
console.info('Succeeded in obtaining all the display objects. Data: ' + JSON.stringify(data)) console.info('Succeeded in obtaining all the display objects. Data: ' + JSON.stringify(data));
}); });
``` ```
## display.getAllDisplay ## display.getAllDisplay
getAllDisplay(): Promise&lt;Array&lt;Display&gt;&gt; getAllDisplay(): Promise&lt;Array&lt;Display&gt;&gt;
Obtains all the display objects. Obtains all display objects. This API uses a promise to return the result.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Return value** **Return value**
| Type | Description | | Type | Description |
| ----------------------------------------------- | ------------------------------------------------------- | | ----------------------------------------------- | ------------------------------------------------------- |
| Promise&lt;Array&lt;[Display](#display)&gt;&gt; | Promise used to return all the display objects.| | Promise&lt;Array&lt;[Display](#display)&gt;&gt; | Promise used to return all the display objects.|
**Example** **Example**
```js ```js
let promise = display.getAllDisplay(); let promise = display.getAllDisplay();
promise.then(() => { promise.then((data) => {
console.log('getAllDisplay success'); console.info('Succeeded in obtaining all the display objects. Data: ' + JSON.stringify(data));
}).catch((err) => { }).catch((err) => {
console.log('getAllDisplay fail: ' + JSON.stringify(err)); console.error('Failed to obtain all the display objects. Code: ' + JSON.stringify(err));
}); });
``` ```
## display.on('add'|'remove'|'change') ## display.on('add'|'remove'|'change')
on(type: 'add'|'remove'|'change', callback: Callback&lt;number&gt;): void on(type: 'add'|'remove'|'change', callback: Callback&lt;number&gt;): void
Enables listening. Subscribes to display changes.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Parameters** **Parameters**
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- | | Name| Type| Mandatory| Description|
| type | string | Yes| Listening type. The available values are as follows:<br>- **add**: listening for whether a display is added<br>- **remove**: listening for whether a display is removed<br>- **change**: listening for whether a display is changed| | -------- | -------- | -------- | -------- |
| callback | Callback&lt;number&gt; | Yes| Callback used to return the ID of the display.| | type | string | Yes| Event type.<br>- **add**, indicating the display addition event.<br>- **remove**, indicating the display removal event.<br>- **change**, indicating the display change event.|
| callback | Callback&lt;number&gt; | Yes| Callback used to return the ID of the display.|
**Example** **Example**
```js
var callback = (data) => {
console.info('Listening enabled. Data: ' + JSON.stringify(data))
}
display.on("add", callback);
```
```js
var callback = (data) => {
console.info('Listening enabled. Data: ' + JSON.stringify(data))
}
display.on("add", callback);
```
## display.off('add'|'remove'|'change') ## display.off('add'|'remove'|'change')
off(type: 'add'|'remove'|'change', callback?: Callback&lt;number&gt;): void off(type: 'add'|'remove'|'change', callback?: Callback&lt;number&gt;): void
Disables listening. Unsubscribes from display changes.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
**Parameters** **Parameters**
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- | | Name| Type| Mandatory| Description|
| type | string | Yes| Listening type. The available values are as follows:<br>- **add**: listening for whether a display is added<br>- **remove**: listening for whether a display is removed<br>- **change**: listening for whether a display is changed| | -------- | -------- | -------- | -------- |
| callback | Callback&lt;number&gt; | No| Callback used to return the ID of the display.| | type | string | Yes| Event type.<br>- **add**, indicating the display addition event.<br>- **remove**, indicating the display removal event.<br>- **change**, indicating the display change event.|
| callback | Callback&lt;number&gt; | No| Callback used to return the ID of the display.|
**Example** **Example**
```js ```js
display.off("remove"); display.off("remove");
``` ```
en/application-dev/reference/apis/js-apis-featureAbility.md
浏览文件 @ 3bc24b2e
...@@ -138,10 +138,10 @@ Starts an ability. This API uses a callback to return the execution result when ...@@ -138,10 +138,10 @@ Starts an ability. This API uses a callback to return the execution result when
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
import wantConstant from '@ohos.ability.wantConstant' import wantConstant from '@ohos.ability.wantConstant'
featureAbility.startAbilityForResult( featureAbility.startAbilityForResult(
{ {
want: want:
{ {
action: "action.system.home", action: "action.system.home",
...@@ -154,6 +154,9 @@ featureAbility.startAbilityForResult( ...@@ -154,6 +154,9 @@ featureAbility.startAbilityForResult(
uri:"" uri:""
}, },
}, },
(err, data) => {
console.info("err: " + JSON.stringify(err) + "data: " + JSON.stringify(data))
}
) )
``` ```
...@@ -180,7 +183,7 @@ Starts an ability. This API uses a promise to return the execution result when t ...@@ -180,7 +183,7 @@ Starts an ability. This API uses a promise to return the execution result when t
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
import wantConstant from '@ohos.ability.wantConstant' import wantConstant from '@ohos.ability.wantConstant'
featureAbility.startAbilityForResult( featureAbility.startAbilityForResult(
{ {
...@@ -284,7 +287,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th ...@@ -284,7 +287,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
import wantConstant from '@ohos.ability.wantConstant' import wantConstant from '@ohos.ability.wantConstant'
featureAbility.terminateSelfWithResult( featureAbility.terminateSelfWithResult(
{ {
...@@ -335,7 +338,7 @@ Checks whether the main window of this ability has the focus. This API uses a ca ...@@ -335,7 +338,7 @@ Checks whether the main window of this ability has the focus. This API uses a ca
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.hasWindowFocus() featureAbility.hasWindowFocus()
``` ```
...@@ -358,7 +361,7 @@ Checks whether the main window of this ability has the focus. This API uses a pr ...@@ -358,7 +361,7 @@ Checks whether the main window of this ability has the focus. This API uses a pr
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.hasWindowFocus().then((data) => { featureAbility.hasWindowFocus().then((data) => {
console.info("==========================>hasWindowFocus=======================>"); console.info("==========================>hasWindowFocus=======================>");
}); });
...@@ -383,7 +386,7 @@ Obtains the **Want** object sent from this ability. This API uses a callback to ...@@ -383,7 +386,7 @@ Obtains the **Want** object sent from this ability. This API uses a callback to
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.getWant() featureAbility.getWant()
``` ```
...@@ -406,7 +409,7 @@ Obtains the **Want** object sent from this ability. This API uses a promise to r ...@@ -406,7 +409,7 @@ Obtains the **Want** object sent from this ability. This API uses a promise to r
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.getWant().then((data) => { featureAbility.getWant().then((data) => {
console.info("==========================>getWantCallBack=======================>"); console.info("==========================>getWantCallBack=======================>");
}); });
...@@ -429,7 +432,7 @@ Obtains the application context. ...@@ -429,7 +432,7 @@ Obtains the application context.
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
var context = featureAbility.getContext() var context = featureAbility.getContext()
context.getBundleName() context.getBundleName()
``` ```
...@@ -453,7 +456,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th ...@@ -453,7 +456,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.terminateSelf() featureAbility.terminateSelf()
``` ```
...@@ -476,7 +479,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th ...@@ -476,7 +479,7 @@ Destroys this Page ability, with the result code and data sent to the caller. Th
**Example** **Example**
```javascript ```javascript
import featureAbility from '@ohos.ability.featureability'; import featureAbility from '@ohos.ability.featureAbility';
featureAbility.terminateSelf().then((data) => { console.info("==========================>terminateSelfCallBack=======================>"); featureAbility.terminateSelf().then((data) => { console.info("==========================>terminateSelfCallBack=======================>");
}); });
``` ```
...@@ -926,6 +929,8 @@ Enumerates operation types of the Data ability. ...@@ -926,6 +929,8 @@ Enumerates operation types of the Data ability.
| action | Read-only | string | No | Action option. | | action | Read-only | string | No | Action option. |
| parameters | Read-only | {[key: string]: any} | No | List of parameters in the **Want** object. | | parameters | Read-only | {[key: string]: any} | No | List of parameters in the **Want** object. |
| entities | Read-only | Array\<string> | No | List of entities. | | entities | Read-only | Array\<string> | No | List of entities. |
| extensionAbilityType<sup>9+</sup> | Read-only | bundle.ExtensionAbilityType | No | Type of the Extension ability. |
| extensionAbilityName<sup>9+<sup> | Read-only | string | No | Description of the Extension ability name in the **Want** object. |
## flags ## flags
......
en/application-dev/reference/apis/js-apis-mediaquery.md
浏览文件 @ 3bc24b2e
...@@ -26,6 +26,7 @@ Sets the media query criteria and returns the corresponding listening handle. ...@@ -26,6 +26,7 @@ Sets the media query criteria and returns the corresponding listening handle.
**System capability**: SystemCapability.ArkUI.ArkUI.Full **System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters** **Parameters**
| Name | Type | Mandatory | Description | | Name | Type | Mandatory | Description |
| --------- | ------ | ---- | ---------------------------------------- | | --------- | ------ | ---- | ---------------------------------------- |
| condition | string | Yes | Matching condition of a media event. For details, see [Syntax of Media Query Conditions](../../ui/ui-ts-layout-mediaquery.md#syntax-of-media-query-conditions).| | condition | string | Yes | Matching condition of a media event. For details, see [Syntax of Media Query Conditions](../../ui/ui-ts-layout-mediaquery.md#syntax-of-media-query-conditions).|
...@@ -37,7 +38,7 @@ Sets the media query criteria and returns the corresponding listening handle. ...@@ -37,7 +38,7 @@ Sets the media query criteria and returns the corresponding listening handle.
**Example** **Example**
```js ```js
listener = mediaquery.matchMediaSync('(orientation: landscape)'); // Listen for landscape events. let listener = mediaquery.matchMediaSync('(orientation: landscape)'); // Listen for landscape events.
``` ```
...@@ -66,7 +67,7 @@ Registers a callback with the corresponding query condition by using the handle. ...@@ -66,7 +67,7 @@ Registers a callback with the corresponding query condition by using the handle.
**Parameters** **Parameters**
| Name | Type | Mandatory | Description | | Name | Type | Mandatory | Description |
| -------- | -------------------------------- | ---- | ---------------- | | -------- | -------------------------------- | ---- | ---------------- |
| type | string | Yes | Must enter the string **'change'**.| | type | string | Yes | Must enter the string **change**.|
| callback | Callback&lt;MediaQueryResult&gt; | Yes | Callback registered with media query. | | callback | Callback&lt;MediaQueryResult&gt; | Yes | Callback registered with media query. |
**Example** **Example**
...@@ -88,7 +89,7 @@ Deregisters a callback with the corresponding query condition by using the handl ...@@ -88,7 +89,7 @@ Deregisters a callback with the corresponding query condition by using the handl
| callback | Callback&lt;MediaQueryResult&gt; | No | Callback to be deregistered. If the default value is used, all callbacks of the handle are deregistered.| | callback | Callback&lt;MediaQueryResult&gt; | No | Callback to be deregistered. If the default value is used, all callbacks of the handle are deregistered.|
**Example** **Example**
```js ```ts
import mediaquery from '@ohos.mediaquery' import mediaquery from '@ohos.mediaquery'
let listener = mediaquery.matchMediaSync('(orientation: landscape)'); // Listen for landscape events. let listener = mediaquery.matchMediaSync('(orientation: landscape)'); // Listen for landscape events.
...@@ -117,10 +118,9 @@ Deregisters a callback with the corresponding query condition by using the handl ...@@ -117,10 +118,9 @@ Deregisters a callback with the corresponding query condition by using the handl
### Example ### Example
```js ```ts
import mediaquery from '@ohos.mediaquery' import mediaquery from '@ohos.mediaquery'
let portraitFunc = null
@Entry @Entry
@Component @Component
...@@ -140,7 +140,7 @@ struct MediaQueryExample { ...@@ -140,7 +140,7 @@ struct MediaQueryExample {
} }
aboutToAppear() { aboutToAppear() {
portraitFunc = this.onPortrait.bind(this) //bind current js instance let portraitFunc = this.onPortrait.bind(this) // Bind the current JS instance.
this.listener.on('change', portraitFunc) this.listener.on('change', portraitFunc)
} }
......
en/application-dev/reference/apis/js-apis-sensor.md
浏览文件 @ 3bc24b2e
# Sensor # Sensor
> **NOTE** > **NOTE**
> >
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
...@@ -1351,8 +1350,6 @@ off(type: SensorType.SENSOR_TYPE_ID_HUMIDITY, callback?: Callback&lt;HumidityRes ...@@ -1351,8 +1350,6 @@ off(type: SensorType.SENSOR_TYPE_ID_HUMIDITY, callback?: Callback&lt;HumidityRes
Unsubscribes from sensor data changes. Unsubscribes from sensor data changes.
**Required permissions**: ohos.permission.READ_HEALTH_DATA (a system permission)
**System capability**: SystemCapability.Sensors.Sensor **System capability**: SystemCapability.Sensors.Sensor
**Parameters** **Parameters**
...@@ -1405,8 +1402,6 @@ sensor.off(sensor.SensorType.SENSOR_TYPE_ID_LINEAR_ACCELERATION, callback); ...@@ -1405,8 +1402,6 @@ sensor.off(sensor.SensorType.SENSOR_TYPE_ID_LINEAR_ACCELERATION, callback);
Unsubscribes from sensor data changes. Unsubscribes from sensor data changes.
**Required permissions**: ohos.permission.ACCELEROMETER (a system permission)
**System capability**: SystemCapability.Sensors.Sensor **System capability**: SystemCapability.Sensors.Sensor
**Parameters** **Parameters**
...@@ -1488,6 +1483,8 @@ off(type: SensorType.SENSOR_TYPE_ID_PEDOMETER, callback?: Callback&lt;PedometerR ...@@ -1488,6 +1483,8 @@ off(type: SensorType.SENSOR_TYPE_ID_PEDOMETER, callback?: Callback&lt;PedometerR
Unsubscribes from sensor data changes. Unsubscribes from sensor data changes.
**Required permissions**: ohos.permission.ACTIVITY_MOTION
**System capability**: SystemCapability.Sensors.Sensor **System capability**: SystemCapability.Sensors.Sensor
**Parameters** **Parameters**
...@@ -1718,7 +1715,7 @@ sensor.getGeomagneticField({latitude:80, longitude:0, altitude:0}, 1580486400000 ...@@ -1718,7 +1715,7 @@ sensor.getGeomagneticField({latitude:80, longitude:0, altitude:0}, 1580486400000
console.error('Operation failed. Error code: ' + err.code + '; message: ' + err.message); console.error('Operation failed. Error code: ' + err.code + '; message: ' + err.message);
return; return;
} }
console.info('sensor_getGeomagneticField_promise x: ' + data.x + ',y: ' + data.y + ',z: ' + console.info('sensor_getGeomagneticField_callback x: ' + data.x + ',y: ' + data.y + ',z: ' +
data.z + ',geomagneticDip: ' + data.geomagneticDip + ',deflectionAngle: ' + data.deflectionAngle + data.z + ',geomagneticDip: ' + data.geomagneticDip + ',deflectionAngle: ' + data.deflectionAngle +
',levelIntensity: ' + data.levelIntensity + ',totalIntensity: ' + data.totalIntensity); ',levelIntensity: ' + data.levelIntensity + ',totalIntensity: ' + data.totalIntensity);
}); });
...@@ -1900,7 +1897,6 @@ Obtains the angle change between two rotation matrices. This API uses a callback ...@@ -1900,7 +1897,6 @@ Obtains the angle change between two rotation matrices. This API uses a callback
err.message); err.message);
return; return;
} }
console.info("SensorJsAPI--->Successed to get getAngleModifiy interface get data: " + data.x);
for (var i=0; i < data.length; i++) { for (var i=0; i < data.length; i++) {
console.info("data[" + i + "]: " + data[i]); console.info("data[" + i + "]: " + data[i]);
} }
...@@ -1968,7 +1964,6 @@ Converts a rotation vector into a rotation matrix. This API uses a callback to r ...@@ -1968,7 +1964,6 @@ Converts a rotation vector into a rotation matrix. This API uses a callback to r
err.message); err.message);
return; return;
} }
console.info("SensorJsAPI--->Successed to get createRotationMatrix interface get data: " + data.x);
for (var i=0; i < data.length; i++) { for (var i=0; i < data.length; i++) {
console.info("data[" + i + "]: " + data[i]); console.info("data[" + i + "]: " + data[i]);
} }
...@@ -2035,7 +2030,6 @@ Converts a rotation vector into a quaternion. This API uses a callback to return ...@@ -2035,7 +2030,6 @@ Converts a rotation vector into a quaternion. This API uses a callback to return
err.message); err.message);
return; return;
} }
console.info("SensorJsAPI--->Successed to get createQuaternion interface get data: " + data.x);
for (var i=0; i < data.length; i++) { for (var i=0; i < data.length; i++) {
console.info("data[" + i + "]: " + data[i]); console.info("data[" + i + "]: " + data[i]);
} }
...@@ -2102,7 +2096,6 @@ Obtains the device direction based on the rotation matrix. This API uses a callb ...@@ -2102,7 +2096,6 @@ Obtains the device direction based on the rotation matrix. This API uses a callb
err.message); err.message);
return; return;
} }
console.info("SensorJsAPI--->Successed to get getDirection interface get data: " + data);
for (var i = 1; i < data.length; i++) { for (var i = 1; i < data.length; i++) {
console.info("sensor_getDirection_callback" + data[i]); console.info("sensor_getDirection_callback" + data[i]);
} }
...@@ -2170,7 +2163,6 @@ Creates a rotation matrix based on the gravity vector and geomagnetic vector. Th ...@@ -2170,7 +2163,6 @@ Creates a rotation matrix based on the gravity vector and geomagnetic vector. Th
err.message); err.message);
return; return;
} }
console.info("SensorJsAPI--->Successed to get createRotationMatrix interface get data: " + data.x);
for (var i=0; i < data.rotation.length; i++) { for (var i=0; i < data.rotation.length; i++) {
console.info("data[" + i + "]: " + data[i]) console.info("data[" + i + "]: " + data[i])
} }
...@@ -2419,9 +2411,9 @@ Describes the Hall effect sensor data. It extends from [Response](#response). ...@@ -2419,9 +2411,9 @@ Describes the Hall effect sensor data. It extends from [Response](#response).
**System capability**: SystemCapability.Sensors.Sensor **System capability**: SystemCapability.Sensors.Sensor
| Name | Type | Readable | Writable | Description | | Name | Type| Readable| Writable| Description |
| ------ | ------ | ---- | ---- | --------------------------------- | | ------ | -------- | ---- | ---- | ------------------------------------------------------------ |
| status | number | Yes | Yes | Hall effect sensor status. This parameter specifies whether a magnetic field exists around a device. The value **0** means that a magnetic field exists around the device, and **1** means the opposite.| | status | number | Yes | Yes | Hall effect sensor status. This parameter specifies whether a magnetic field exists around a device. The value **0** means that a magnetic field does not exist, and a value greater than **0** means the opposite.|
## MagneticFieldResponse ## MagneticFieldResponse
......
en/application-dev/reference/apis/js-apis-timer.md
浏览文件 @ 3bc24b2e
# Timer # Timer
The **Timer** module provides basic timer capabilities. You can use the APIs of this module to execute functions at the specified time.
> **NOTE**
>
> The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
## setTimeout ## setTimeout
...@@ -7,6 +12,8 @@ setTimeout(handler[,delay[,…args]]): number ...@@ -7,6 +12,8 @@ setTimeout(handler[,delay[,…args]]): number
Sets a timer for the system to call a function after the timer goes off. Sets a timer for the system to call a function after the timer goes off.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters** **Parameters**
| Name| Type| Mandatory| Description| | Name| Type| Mandatory| Description|
...@@ -23,15 +30,15 @@ Sets a timer for the system to call a function after the timer goes off. ...@@ -23,15 +30,15 @@ Sets a timer for the system to call a function after the timer goes off.
**Example** **Example**
```js ```js
export default { export default {
setTimeOut() { setTimeOut() {
var timeoutID = setTimeout(function() { var timeoutID = setTimeout(function() {
console.log('delay 1s'); console.log('delay 1s');
}, 1000); }, 1000);
}
} }
} ```
```
## clearTimeout ## clearTimeout
...@@ -40,6 +47,8 @@ clearTimeout(timeoutID: number): void ...@@ -40,6 +47,8 @@ clearTimeout(timeoutID: number): void
Cancels the timer created via **setTimeout()**. Cancels the timer created via **setTimeout()**.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters** **Parameters**
| Name| Type| Mandatory| Description| | Name| Type| Mandatory| Description|
...@@ -48,16 +57,16 @@ Cancels the timer created via **setTimeout()**. ...@@ -48,16 +57,16 @@ Cancels the timer created via **setTimeout()**.
**Example** **Example**
```js ```js
export default { export default {
clearTimeOut() { clearTimeOut() {
var timeoutID = setTimeout(function() { var timeoutID = setTimeout(function() {
console.log('do after 1s delay.'); console.log('do after 1s delay.');
}, 1000); }, 1000);
clearTimeout(timeoutID); clearTimeout(timeoutID);
}
} }
} ```
```
## setInterval ## setInterval
...@@ -66,6 +75,8 @@ setInterval(handler[, delay[, ...args]]): number ...@@ -66,6 +75,8 @@ setInterval(handler[, delay[, ...args]]): number
Sets a repeating timer for the system to repeatedly call a function at a fixed interval. Sets a repeating timer for the system to repeatedly call a function at a fixed interval.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters** **Parameters**
| Name| Type| Mandatory| Description| | Name| Type| Mandatory| Description|
...@@ -82,15 +93,15 @@ Sets a repeating timer for the system to repeatedly call a function at a fixed i ...@@ -82,15 +93,15 @@ Sets a repeating timer for the system to repeatedly call a function at a fixed i
**Example** **Example**
```js ```js
export default { export default {
setInterval() { setInterval() {
var intervalID = setInterval(function() { var intervalID = setInterval(function() {
console.log('do very 1s.'); console.log('do very 1s.');
}, 1000); }, 1000);
}
} }
} ```
```
## clearInterval ## clearInterval
...@@ -99,6 +110,8 @@ clearInterval(intervalID: number): void ...@@ -99,6 +110,8 @@ clearInterval(intervalID: number): void
Cancels the repeating timer set via **setInterval()**. Cancels the repeating timer set via **setInterval()**.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters** **Parameters**
| Name| Type| Mandatory| Description| | Name| Type| Mandatory| Description|
...@@ -107,13 +120,13 @@ Cancels the repeating timer set via **setInterval()**. ...@@ -107,13 +120,13 @@ Cancels the repeating timer set via **setInterval()**.
**Example** **Example**
```js ```js
export default { export default {
clearInterval() { clearInterval() {
var intervalID = setInterval(function() { var intervalID = setInterval(function() {
console.log('do very 1s.'); console.log('do very 1s.');
}, 1000); }, 1000);
clearInterval(intervalID); clearInterval(intervalID);
}
} }
} ```
```
\ No newline at end of file
en/application-dev/reference/apis/js-apis-window.md
浏览文件 @ 3bc24b2e
...@@ -10,7 +10,6 @@ This module provides the following common window-related functions: ...@@ -10,7 +10,6 @@ This module provides the following common window-related functions:
> >
> The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version. > The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
## Modules to Import ## Modules to Import
```js ```js
...@@ -35,10 +34,10 @@ Enumerates the types of the area where the window cannot be displayed. ...@@ -35,10 +34,10 @@ Enumerates the types of the area where the window cannot be displayed.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
| Name | Value | Description | | Name | Value | Description |
| ----------- | ---- | ------------------ | |----------------------------------|-----| ----------------- |
| TYPE_SYSTEM | 0 | Default area of the system.| | TYPE_SYSTEM | 0 | Default area of the system.|
| TYPE_CUTOUT | 1 | Notch. | | TYPE_CUTOUT | 1 | Notch. |
## WindowMode<sup>7+</sup> ## WindowMode<sup>7+</sup>
...@@ -64,11 +63,11 @@ Describes the properties of the status bar and navigation bar. ...@@ -64,11 +63,11 @@ Describes the properties of the status bar and navigation bar.
| Name | Type| Readable| Writable| Description | | Name | Type| Readable| Writable| Description |
| -------------------------------------- | -------- | ---- | ---- | ------------------------------------------------------------ | | -------------------------------------- | -------- | ---- | ---- | ------------------------------------------------------------ |
| statusBarColor | string | Yes | Yes | Background color of the status bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.| | statusBarColor | string | No | Yes | Background color of the status bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.|
| isStatusBarLightIcon<sup>7+</sup> | boolean | No | Yes | Whether any icon on the status bar is highlighted. | | isStatusBarLightIcon<sup>7+</sup> | boolean | No | Yes | Whether any icon on the status bar is highlighted. |
| statusBarContentColor<sup>8+</sup> | string | No | Yes | Color of the text on the status bar. | | statusBarContentColor<sup>8+</sup> | string | No | Yes | Color of the text on the status bar. |
| navigationBarColor | string | Yes | Yes | Background color of the navigation bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.| | navigationBarColor | string | No | Yes | Background color of the navigation bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.|
| isNavigationBarLightIcon<sup>7+</sup> | boolean | No | No | Whether any icon on the navigation bar is highlighted. | | isNavigationBarLightIcon<sup>7+</sup> | boolean | No | Yes | Whether any icon on the navigation bar is highlighted. |
| navigationBarContentColor<sup>8+</sup> | string | No | Yes | Color of the text on the navigation bar. | | navigationBarContentColor<sup>8+</sup> | string | No | Yes | Color of the text on the navigation bar. |
## SystemBarRegionTint<sup>8+</sup> ## SystemBarRegionTint<sup>8+</sup>
...@@ -81,11 +80,11 @@ Describes the callback for a single system bar. ...@@ -81,11 +80,11 @@ Describes the callback for a single system bar.
| Name | Type | Readable| Writable| Description | | Name | Type | Readable| Writable| Description |
| --------------- | ------------------------- | ---- | ---- | ------------------------------------------------------------ | | --------------- | ------------------------- | ---- | ---- | ------------------------------------------------------------ |
| type | [WindowType](#windowtype) | Yes | Yes | Type of the system bar whose properties are changed. Only the status bar and navigation bar are supported.| | type | [WindowType](#windowtype) | Yes | No | Type of the system bar whose properties are changed. Only the status bar and navigation bar are supported.|
| isEnable | boolean | Yes | Yes | Whether the system bar is displayed. | | isEnable | boolean | Yes | No | Whether the system bar is displayed. |
| region | [Rect](#rect) | Yes | Yes | Current position and size of the system bar. | | region | [Rect](#rect) | Yes | No | Current position and size of the system bar. |
| backgroundColor | string | Yes | Yes | Background color of the system bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.| | backgroundColor | string | Yes | No | Background color of the system bar. The value is a hexadecimal RGB or aRGB color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.|
| contentColor | string | Yes | Yes | Color of the text on the system bar. | | contentColor | string | Yes | No | Color of the text on the system bar. |
## SystemBarTintState<sup>8+</sup> ## SystemBarTintState<sup>8+</sup>
...@@ -98,7 +97,7 @@ Describes the callback for the current system bar. ...@@ -98,7 +97,7 @@ Describes the callback for the current system bar.
| Name | Type | Readable| Writable| Description | | Name | Type | Readable| Writable| Description |
| ---------- | --------------------------------------------------- | ---- | ---- | ---------------------------- | | ---------- | --------------------------------------------------- | ---- | ---- | ---------------------------- |
| displayId | number | Yes | No | ID of the current physical screen. | | displayId | number | Yes | No | ID of the current physical screen. |
| regionTint | Array<[SystemBarRegionTint](#systembarregiontint8)> | Yes | Yes | All system bar information that has been changed.| | regionTint | Array<[SystemBarRegionTint](#systembarregiontint8)> | Yes | No | All system bar information that has been changed.|
## Rect<sup>7+</sup> ## Rect<sup>7+</sup>
...@@ -126,6 +125,7 @@ Describes the area where the window cannot be displayed. ...@@ -126,6 +125,7 @@ Describes the area where the window cannot be displayed.
| rightRect | [Rect](#rect) | Yes | Yes | Rectangle on the right of the screen.| | rightRect | [Rect](#rect) | Yes | Yes | Rectangle on the right of the screen.|
| bottomRect | [Rect](#rect) | Yes | Yes | Rectangle at the bottom of the screen.| | bottomRect | [Rect](#rect) | Yes | Yes | Rectangle at the bottom of the screen.|
## Size<sup>7+</sup> ## Size<sup>7+</sup>
Describes the window size. Describes the window size.
...@@ -143,20 +143,20 @@ Describes the window properties. ...@@ -143,20 +143,20 @@ Describes the window properties.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
| Name | Type | Readable| Writable| Description | | Name | Type | Readable| Writable| Description |
| ------------------------------- | ------------------------- | ---- | ---- | -------------------------------------------- | | ------------------------------------- | ------------------------- | ---- | ---- | ------------------------------------------------------------ |
| windowRect<sup>7+</sup> | [Rect](#rect) | Yes | Yes | Window size. | | windowRect<sup>7+</sup> | [Rect](#rect) | Yes | Yes | Window size. |
| type<sup>7+</sup> | [WindowType](#windowtype) | Yes | Yes | Window type. | | type<sup>7+</sup> | [WindowType](#windowtype) | Yes | Yes | Window type. |
| isFullScreen | boolean | Yes | Yes | Whether the window is displayed in full screen mode. The default value is `false`. | | isFullScreen | boolean | Yes | Yes | Whether the window is displayed in full screen mode. The default value is `false`. |
| isLayoutFullScreen<sup>7+</sup> | boolean | Yes | Yes | Whether the window layout is in full-screen mode (whether the window is immersive). The default value is `false`. | | isLayoutFullScreen<sup>7+</sup> | boolean | Yes | Yes | Whether the window layout is in full-screen mode (whether the window is immersive). The default value is `false`. |
| focusable<sup>7+</sup> | boolean | Yes | No | Whether the window can gain focus. The default value is `true`. | | focusable<sup>7+</sup> | boolean | Yes | No | Whether the window can gain focus. The default value is `true`. |
| touchable<sup>7+</sup> | boolean | Yes | No | Whether the window is touchable. The default value is `true`. | | touchable<sup>7+</sup> | boolean | Yes | No | Whether the window is touchable. The default value is `true`. |
| brightness | number | Yes | Yes | Screen brightness. The value ranges from 0 to 1. The value `1` indicates the maximum brightness. | | brightness | number | Yes | Yes | Screen brightness. The value ranges from 0 to 1. The value `1` indicates the maximum brightness. |
| dimBehindValue<sup>7+</sup> | number | Yes | Yes | Dimness of the window that is not on top. The value ranges from 0 to 1. The value `1` indicates the maximum dimness.| | dimBehindValue<sup>7+</sup> | number | Yes | Yes | Dimness of the window that is not on top. The value ranges from 0 to 1. The value `1` indicates the maximum dimness. |
| isKeepScreenOn | boolean | Yes | Yes | Whether the screen is always on. The default value is `false`. | | isKeepScreenOn | boolean | Yes | Yes | Whether the screen is always on. The default value is `false`. |
| isPrivacyMode<sup>7+</sup> | boolean | Yes | Yes | Whether the window is in privacy mode. The default value is `false`. | | isPrivacyMode<sup>7+</sup> | boolean | Yes | Yes | Whether the window is in privacy mode. The default value is `false`. |
| isRoundCorner<sup>7+</sup> | boolean | Yes | Yes | Whether the window has rounded corners. The default value is `false`. | | isRoundCorner<sup>7+</sup> | boolean | Yes | Yes | Whether the window has rounded corners. The default value is `false`. |
| isTransparent<sup>7+</sup> | boolean | Yes | Yes | Whether the window is transparent. The default value is `false`. | | isTransparent<sup>7+</sup> | boolean | Yes | Yes | Whether the window is transparent. The default value is `false`. |
## ColorSpace<sup>8+</sup> ## ColorSpace<sup>8+</sup>
...@@ -245,7 +245,7 @@ Creates a subwindow. This API uses an asynchronous callback to return the result ...@@ -245,7 +245,7 @@ Creates a subwindow. This API uses an asynchronous callback to return the result
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | -------------------------------------- | ---- | ------------------------------------------------------------ | | -------- | -------------------------------------- | ---- | ------------------------------------------------------------ |
| ctx | [Context](js-apis-Context.md) | Yes | Current application context.| | ctx | [Context](js-apis-Context.md) | Yes | Current application context.|
| id | string | Yes | Window ID. | | id | string | Yes | Window ID. |
| type | [WindowType](#windowtype) | Yes | Window type. | | type | [WindowType](#windowtype) | Yes | Window type. |
| callback | AsyncCallback&lt;[Window](#window)&gt; | Yes | Callback used to return the subwindow created. | | callback | AsyncCallback&lt;[Window](#window)&gt; | Yes | Callback used to return the subwindow created. |
...@@ -430,7 +430,7 @@ Obtains the top window of the current application. This API uses an asynchronous ...@@ -430,7 +430,7 @@ Obtains the top window of the current application. This API uses an asynchronous
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | -------------------------------------- | ---- | ------------------------------------------------------------ | | -------- | -------------------------------------- | ---- | ------------------------------------------------------------ |
| ctx | [Context](js-apis-Context.md) | Yes | Current application context. | | ctx | [Context](js-apis-Context.md) | Yes | Current application context.|
| callback | AsyncCallback&lt;[Window](#window)&gt; | Yes | Callback used to return the top window obtained. | | callback | AsyncCallback&lt;[Window](#window)&gt; | Yes | Callback used to return the top window obtained. |
**Example** **Example**
...@@ -937,8 +937,8 @@ Obtains the area where this window cannot be displayed, for example, the system ...@@ -937,8 +937,8 @@ Obtains the area where this window cannot be displayed, for example, the system
**Parameters** **Parameters**
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | -------------------------------------------- | ---- | ------------------------------------------------------------ | | -------- |-----------------------------------------------| ---- | ------------------------------------------------------------ |
| type | [AvoidAreaType](#avoidareatype) | Yes | Type of the area. `TYPE_SYSTEM` indicates the default area of the system. `TYPE_CUTOUT` indicates the notch.| | type | [AvoidAreaType](#avoidareatype) | Yes | Type of the area. `TYPE_SYSTEM` indicates the default area of the system. `TYPE_CUTOUT` indicates the notch.|
| callback | AsyncCallback&lt;[AvoidArea](#avoidarea)&gt; | Yes | Callback used to return the area. | | callback | AsyncCallback&lt;[AvoidArea](#avoidarea)&gt; | Yes | Callback used to return the area. |
...@@ -965,20 +965,21 @@ Obtains the area where this window cannot be displayed, for example, the system ...@@ -965,20 +965,21 @@ Obtains the area where this window cannot be displayed, for example, the system
**Parameters** **Parameters**
| Name| Type | Mandatory| Description | | Name| Type | Mandatory| Description |
| ------ | ------------------------------- | ---- | ------------------------------------------------------------ | | ------ |----------------------------------| ---- | ------------------------------------------------------------ |
| type | [AvoidAreaType](#avoidareatype) | Yes | Type of the area. `TYPE_SYSTEM` indicates the default area of the system. `TYPE_CUTOUT` indicates the notch.| | type | [AvoidAreaType](#avoidareatype) | Yes | Type of the area. `TYPE_SYSTEM` indicates the default area of the system. `TYPE_CUTOUT` indicates the notch.|
**Return value** **Return value**
| Type | Description | | Type | Description |
| -------------------------------------- | ----------------------------------- | |-----------------------------------------| ----------------------------------- |
| Promise&lt;[AvoidArea](#avoidarea)&gt; | Promise used to return the area.| | Promise&lt;[AvoidArea](#avoidarea)&gt; | Promise used to return the area.|
**Example** **Example**
```js ```js
let promise = windowClass.getAvoidArea(); var type = window.AvoidAreaType.TYPE_SYSTEM;
let promise = windowClass.getAvoidArea(type);
promise.then((data)=> { promise.then((data)=> {
console.info('Succeeded in obtaining the area. Data:' + JSON.stringify(data)); console.info('Succeeded in obtaining the area. Data:' + JSON.stringify(data));
}).catch((err)=>{ }).catch((err)=>{
...@@ -1315,7 +1316,7 @@ Checks whether this window is displayed. This API uses an asynchronous callback ...@@ -1315,7 +1316,7 @@ Checks whether this window is displayed. This API uses an asynchronous callback
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | ---------------------------- | ---- | ------------------------------------------------------------ | | -------- | ---------------------------- | ---- | ------------------------------------------------------------ |
| callback | AsyncCallback&lt;boolean&gt; | Yes | Callback used to return the result. The value `true` means that this window is displayed, and `false` means the opposite.| | callback | AsyncCallback&lt;boolean&gt; | Yes | Callback used to return the result. The value `true` means that the window is displayed, and `false` means the opposite.|
**Example** **Example**
...@@ -1341,7 +1342,7 @@ Checks whether this window is displayed. This API uses a promise to return the r ...@@ -1341,7 +1342,7 @@ Checks whether this window is displayed. This API uses a promise to return the r
| Type | Description | | Type | Description |
| ---------------------- | ------------------------------------------------------------ | | ---------------------- | ------------------------------------------------------------ |
| Promise&lt;boolean&gt; | Promise used to return the result. The value `true` means that this window is displayed, and `false` means the opposite.| | Promise&lt;boolean&gt; | Promise used to return the result. The value `true` means that the window is displayed, and `false` means the opposite.|
**Example** **Example**
...@@ -1408,9 +1409,9 @@ Enables listening for changes to the area where the window cannot be displayed. ...@@ -1408,9 +1409,9 @@ Enables listening for changes to the area where the window cannot be displayed.
**Parameters** **Parameters**
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | --------------------------------------- | ---- | ------------------------------------------------------------ | | -------- |------------------------------------------| ---- | ------------------------------------------------------- |
| type | string | Yes | Event type. The value is fixed at `systemAvoidAreaChange`, indicating the event of changes to the area where the window cannot be displayed.| | type | string | Yes | Event type. The value is fixed at `systemAvoidAreaChange`, indicating the event of changes to the area where the window cannot be displayed.|
| callback | Callback&lt;[AvoidArea](#avoidarea)&gt; | Yes | Callback used to return the area. | | callback | Callback&lt;[AvoidArea](#avoidarea)&gt; | Yes | Callback used to return the area. |
**Example** **Example**
...@@ -1431,10 +1432,10 @@ Disables listening for changes to the area where the window cannot be displayed. ...@@ -1431,10 +1432,10 @@ Disables listening for changes to the area where the window cannot be displayed.
**Parameters** **Parameters**
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | --------------------------------------- | ---- | ------------------------------------------------------------ | | -------- |------------------------------------------| ---- | ------------------------------------------------------- |
| type | string | Yes | Event type. The value is fixed at `systemAvoidAreaChange`, indicating the event of changes to the area where the window cannot be displayed.| | type | string | Yes | Event type. The value is fixed at `systemAvoidAreaChange`, indicating the event of changes to the area where the window cannot be displayed.|
| callback | Callback&lt;[AvoidArea](#avoidarea)&gt; | No | Callback used to return the area. | | callback | Callback&lt;[AvoidArea](#avoidarea)&gt; | No | Callback used to return the area. |
**Example** **Example**
...@@ -1658,7 +1659,7 @@ Sets the background color for this window. This API uses an asynchronous callbac ...@@ -1658,7 +1659,7 @@ Sets the background color for this window. This API uses an asynchronous callbac
| Name | Type | Mandatory| Description | | Name | Type | Mandatory| Description |
| -------- | ------------------------- | ---- | ------------------------------------------------------------ | | -------- | ------------------------- | ---- | ------------------------------------------------------------ |
| color | string | Yes | Background color to set. The value is a hexadecimal color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.| | color | string | Yes | Background color to set. The value is a hexadecimal color code and is case insensitive, for example, `#00FF00` or `#FF00FF00`.|
| callback | AsyncCallback&lt;void&gt; | Yes | Callback used to return the result. | | callback | AsyncCallback&lt;void&gt; | Yes | Callback used to return the result. |
**Example** **Example**
...@@ -1686,7 +1687,7 @@ Sets the background color for this window. This API uses a promise to return the ...@@ -1686,7 +1687,7 @@ Sets the background color for this window. This API uses a promise to return the
| Name| Type | Mandatory| Description | | Name| Type | Mandatory| Description |
| ------ | ------ | ---- | ------------------------------------------------------------ | | ------ | ------ | ---- | ------------------------------------------------------------ |
| color | string | Yes | Background color to set. The value is a hexadecimal color value and is case insensitive, for example, `#00FF00` or `#FF00FF00`.| | color | string | Yes | Background color to set. The value is a hexadecimal color code and is case insensitive, for example, `#00FF00` or `#FF00FF00`.|
**Return value** **Return value**
...@@ -1772,8 +1773,9 @@ setDimBehind(dimBehindValue: number, callback: AsyncCallback&lt;void&gt;): void ...@@ -1772,8 +1773,9 @@ setDimBehind(dimBehindValue: number, callback: AsyncCallback&lt;void&gt;): void
Sets the dimness of the window that is not on top. This API uses an asynchronous callback to return the result. Sets the dimness of the window that is not on top. This API uses an asynchronous callback to return the result.
> **NOTE**: This API cannot be used. > **NOTE**
>
> This API cannot be used.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
...@@ -1802,8 +1804,9 @@ setDimBehind(dimBehindValue: number): Promise&lt;void&gt; ...@@ -1802,8 +1804,9 @@ setDimBehind(dimBehindValue: number): Promise&lt;void&gt;
Sets the dimness of the window that is not on top. This API uses a promise to return the result. Sets the dimness of the window that is not on top. This API uses a promise to return the result.
> **NOTE**: This API cannot be used. > **NOTE**
>
> This API cannot be used.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
...@@ -1956,8 +1959,9 @@ setOutsideTouchable(touchable: boolean, callback: AsyncCallback&lt;void&gt;): vo ...@@ -1956,8 +1959,9 @@ setOutsideTouchable(touchable: boolean, callback: AsyncCallback&lt;void&gt;): vo
Sets whether the area outside the subwindow is touchable. This API uses an asynchronous callback to return the result. Sets whether the area outside the subwindow is touchable. This API uses an asynchronous callback to return the result.
> **NOTE**: This API cannot be used. > **NOTE**
>
> This API cannot be used.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
...@@ -1986,8 +1990,9 @@ setOutsideTouchable(touchable: boolean): Promise&lt;void&gt; ...@@ -1986,8 +1990,9 @@ setOutsideTouchable(touchable: boolean): Promise&lt;void&gt;
Sets whether the area outside the subwindow is touchable. This API uses a promise to return the result. Sets whether the area outside the subwindow is touchable. This API uses a promise to return the result.
> **NOTE**: This API cannot be used. > **NOTE**
>
> This API cannot be used.
**System capability**: SystemCapability.WindowManager.WindowManager.Core **System capability**: SystemCapability.WindowManager.WindowManager.Core
......
en/application-dev/reference/arkui-ts/ts-basic-components-search.md
浏览文件 @ 3bc24b2e
# Search # Search
The **\<Search>** component provides an input area for users to search.
> **NOTE** > **NOTE**
> >
> This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version. > This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
The **\<Search>** component provides an input area for users to search.
## Required Permissions ## Required Permissions
None None
...@@ -18,34 +18,34 @@ Not supported ...@@ -18,34 +18,34 @@ Not supported
Search(options?: { value?: string; placeholder?: string; icon?: string; controller?: SearchController }) Search(options?: { value?: string; placeholder?: string; icon?: string; controller?: SearchController })
- Parameters **Parameters**
| Name | Type | Mandatory | Default Value | Description | | Name | Type | Mandatory | Default Value | Description |
| -------- | -------- | -------- | -------- | -------- | | ----------- | ---------------- | ---- | ---- | ---------------------------------------- |
| value | string | No| - | Text input in the search text box. | | value | string | No | - | Text input in the search text box. |
| placeholder | string | No | - | Text displayed when there is no input. | | placeholder | string | No | - | Text displayed when there is no input. |
| icon | string | No| - | Path to the search icon. By default, the system search icon is used. The supported icon formats are .svg, .jpg, and .png. | | icon | string | No | - | Path to the search icon. By default, the system search icon is used. The supported icon formats are .svg, .jpg, and .png.|
| controller | SearchController | No| - | Controller. | | controller | SearchController | No | - | Controller. |
## Attributes ## Attributes
| Name | Type | Default Value | Description | | Name | Type | Default Value | Description |
| -------- | -------- | -------- | -------- | | ----------------------- | ---------------------------------------- | ---- | --------------------- |
| searchButton | string | –| Text on the search button located next to the search text box. By default, there is no search button. | | searchButton | string | – | Text on the search button located next to the search text box. By default, there is no search button.|
| placeholderColor | [ResourceColor](../../ui/ts-types.md) | - | Placeholder text color. | | placeholderColor | [ResourceColor](ts-types.md#resourcecolor8) | - | Placeholder text color. |
| placeholderFont | [Font](../../ui/ts-types.md) | - | Placeholder text style. | | placeholderFont | [Font](ts-types.md#font) | - | Placeholder text style. |
| textFont | [Font](../../ui/ts-types.md) | - | Text font for the search text box. | | textFont | [Font](ts-types.md#font) | - | Text font for the search text box. |
## Events ## Events
| Name | Description | | Name | Description |
| -------- | -------- | | ---------------------------------------- | ---------------------------------------- |
| onSubmit(callback: (value: string) => void) | Triggered when users click the search icon or the search button, or tap the search button on a soft keyboard.<br> - **value**: current text input. | | onSubmit(callback: (value: string) => void) | Triggered when users click the search icon or the search button, or touch the search button on a soft keyboard.<br> -**value**: current text input.|
| onChange(callback: (value: string) => void) | Triggered when the input in the text box changes.<br> - **value**: current text input. | | onChange(callback: (value: string) => void) | Triggered when the input in the text box changes.<br> -**value**: current text input. |
| onCopy(callback: (value: string) => void) | Triggered when data is copied to the pasteboard.<br> - **value**: text copied. | | onCopy(callback: (value: string) => void) | Triggered when data is copied to the pasteboard.<br> -**value**: text copied. |
| onCut(callback: (value: string) => void) | Triggered when data is cut from the pasteboard.<br> - **value**: text cut. | | onCut(callback: (value: string) => void) | Triggered when data is cut from the pasteboard.<br> -**value**: text cut. |
| onPaste(callback: (value: string) => void) | Triggered when data is pasted from the pasteboard.<br> - **value**: text pasted. | | onPaste(callback: (value: string) => void) | Triggered when data is pasted from the pasteboard.<br> -**value**: text pasted. |
## SearchController ## SearchController
...@@ -61,11 +61,11 @@ caretPosition(value: number): void ...@@ -61,11 +61,11 @@ caretPosition(value: number): void
Sets the position of the caret. Sets the position of the caret.
- Parameters **Parameters**
| Name | Type | Mandatory | Default Value | Description | | Name | Type | Mandatory | Default Value | Description |
| ---- | ------ | ---- | ---- | --------------------- | | ----- | ------ | ---- | ---- | ----------------- |
| value | number | Yes | - | Length from the start of the text string to the position where the caret is located. | | value | number | Yes | - | Length from the start of the character string to the position where the caret is located.|
...@@ -76,29 +76,30 @@ Sets the position of the caret. ...@@ -76,29 +76,30 @@ Sets the position of the caret.
@Entry @Entry
@Component @Component
struct SearchExample { struct SearchExample {
@State changevalue: string = '' @State changeValue: string = ''
@State submitvalue: string = '' @State submitValue: string = ''
controller: SearchController = new SearchController() controller: SearchController = new SearchController()
build() { build() {
Flex({ direction: FlexDirection.Row, justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) { Flex({ direction: FlexDirection.Row, justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
Text(this.submitvalue) Text(this.submitValue)
Text(this.changevalue) Text(this.changeValue)
Search({value: '', placeholder: 'Type to search', controller: this.controller}) Search({value: this.changeValue, placeholder: 'Type to search', controller: this.controller})
.searchButton('Search') .searchButton('Search')
.width(400) .width(400)
.height(35) .height(35)
.backgroundColor(Color.White) .backgroundColor(Color.White)
.placeholderColor(Color.Grey) .placeholderColor(Color.Grey)
.placeholderFont({ size: 50, weight: 10, family: 'serif', style: FontStyle.Normal }) .placeholderFont({ size: 26, weight: 10, family: 'serif', style: FontStyle.Normal })
.onSubmit((value: string) => { .onSubmit((value: string) => {
this.submitvalue = value this.submitValue = value
}) })
.onChange((value: string) => { .onChange((value: string) => {
this.changevalue = value this.changeValue = value
}) })
.margin({ top: 30 }) .margin({ top: 30, left:10, right:10 })
} }
} }
} }
``` ```
![search](figures/search.png)
en/application-dev/reference/arkui-ts/ts-container-swiper.md
浏览文件 @ 3bc24b2e
...@@ -33,23 +33,23 @@ Swiper(value:{controller?: SwiperController}) ...@@ -33,23 +33,23 @@ Swiper(value:{controller?: SwiperController})
[Menu control](ts-universal-attributes-menu.md) is not supported. [Menu control](ts-universal-attributes-menu.md) is not supported.
| Name | Type | Description | | Name | Type | Default Value | Description |
| --------------------------- | ---------------------------------------- | ---------------------------------------- | | --------------------------- | ---------------------------------------- | ---------------------------------------- | ---------------------------------------- |
| index | number | Index of the child component currently displayed in the container.<br>Default value: **0** | | index | number | 0 | Index of the child component currently displayed in the container. |
| autoPlay | boolean | Whether to enable automatic playback for child component switching. If this attribute is **true**, the navigation dots indicator does not take effect.<br>Default value: **false** | | autoPlay | boolean | false | Whether to enable automatic playback for child component switching. If this attribute is **true**, the navigation dots indicator does not take effect. |
| interval | number | Interval for automatic playback, in ms.<br>Default value: **3000** | | interval | number | 3000 | Interval for automatic playback, in ms. |
| indicator | boolean | Whether to enable the navigation dots indicator.<br>Default value: **true** | | indicator | boolean | true | Whether to enable the navigation dots indicator. |
| loop | boolean | Whether to enable loop playback.<br>The value **true** means to enable loop playback. When LazyForEach is used, it is recommended that the number of the components to load exceed 5.<br>Default value: **true**| | loop | boolean | true | Whether to enable loop playback.<br>The value **true** means to enable loop playback. When LazyForEach is used, it is recommended that the number of the components to load exceed 5. |
| duration | number | Duration of the animation for switching child components, in ms.<br>Default value: **400** | | duration | number | 400 | Duration of the animation for switching child components, in ms. |
| vertical | boolean | Whether vertical swiping is used.<br>Default value: **false** | | vertical | boolean | false | Whether vertical swiping is used. |
| itemSpace | Length | Space between child components.<br>Default value: **0** | | itemSpace | number \| string | 0 | Space between child components. |
| displayMode | SwiperDisplayMode | Mode in which elements are displayed along the main axis. This attribute takes effect only when **displayCount** is not set.<br>Default value: **SwiperDisplayMode.Stretch**| | displayMode | SwiperDisplayMode | SwiperDisplayMode.Stretch | Mode in which elements are displayed along the main axis. This attribute takes effect only when **displayCount** is not set. |
| cachedCount<sup>8+</sup> | number | Number of child components to be cached.<br>Default value: **1** | | cachedCount<sup>8+</sup> | number | 1 | Number of child components to be cached. |
| disableSwipe<sup>8+</sup> | boolean | Whether to disable the swipe feature.<br>Default value: **false** | | disableSwipe<sup>8+</sup> | boolean | false | Whether to disable the swipe feature. |
| curve<sup>8+</sup> | [Curve](ts-animatorproperty.md#Curve) \| string | Animation curve. The ease-in/ease-out curve is used by default. For details about common curves, see [Curve enums](ts-animatorproperty.md#curve-enums). You can also create custom curves ([interpolation curve objects](ts-interpolation-calculation.md)) by using the API provided by the interpolation calculation module.<br>Default value: **Curve.Ease**| | displayCount<sup>8+</sup> | number \| string | 1 | Number of elements to display. |
| indicatorStyle<sup>8+</sup> | {<br>left?:&nbsp;Length,<br>top?:&nbsp;Length,<br>right?:&nbsp;Length,<br>bottom?:&nbsp;Length,<br>size?:&nbsp;Length,<br>color?:&nbsp;Color,<br>selectedColor?:&nbsp;Color<br>} | Style of the navigation dots indicator.<br>- **left**: distance between the navigation dots indicator and the left edge of the **\<Swiper>** component.<br>- **top**: distance between the navigation dots indicator and the top edge of the **\<Swiper>** component.<br>- **right**: distance between the navigation dots indicator and the right edge of the **\<Swiper>** component.<br>- **bottom**: distance between the navigation dots indicator and the bottom edge of the **\<Swiper>** component.<br>- **size**: diameter of the navigation dots indicator.<br>- **color**: color of the navigation dots indicator.<br>- **selectedColor**: color of the selected navigation dot.| | effectMode<sup>8+</sup> | EdgeEffect | EdgeEffect.Spring | Swipe effect. For details, see **EdgeEffect**. |
| displayCount<sup>8+</sup> | number\|string | Number of elements to display.<br>Default value: **1** | | curve<sup>8+</sup> | [Curve](ts-appendix-enums.md#curve) \| string | Curve.Ease | Animation curve. The ease-in/ease-out curve is used by default. For details about common curves, see [Curve](ts-appendix-enums.md#curve). You can also create custom curves ([interpolation curve objects](ts-interpolation-calculation.md)) by using the API provided by the interpolation calculation module. |
| effectMode<sup>8+</sup> | EdgeEffect | Swipe effect. For details, see **EdgeEffect**.<br>Default value: **EdgeEffect.Spring**| | indicatorStyle<sup>8+</sup> | {<br/>left?: [Length](ts-types.md#length),<br/>top?: [Length](ts-types.md#length),<br/>right?: [Length](ts-types.md#length),<br/>bottom?: [Length](ts-types.md#length),<br/>size?: [Length](ts-types.md#length),<br/>mask?: boolean,<br/>color?: [ResourceColor](ts-types.md#resourcecolor8),<br/>selectedColor?: [ResourceColor](ts-types.md#resourcecolor8)<br/>} | - | Style of the navigation dots indicator.<br>- **left**: distance between the navigation dots indicator and the left edge of the **\<Swiper>** component.<br>- **top**: distance between the navigation dots indicator and the top edge of the **\<Swiper>** component.<br>- **right**: distance between the navigation dots indicator and the right edge of the **\<Swiper>** component.<br>- **bottom**: distance between the navigation dots indicator and the bottom edge of the **\<Swiper>** component.<br>- **size**: diameter of the navigation dots indicator.<br>- **color**: color of the navigation dots indicator.<br>- **selectedColor**: color of the selected navigation dot.|
## SwiperDisplayMode ## SwiperDisplayMode
...@@ -98,7 +98,7 @@ Stops this animation. ...@@ -98,7 +98,7 @@ Stops this animation.
### onChange ### onChange
onChange(&nbsp;index:&nbsp;number)&nbsp;=&gt;&nbsp;void onChange( index: number) =&gt; void
Triggered when the index of the currently displayed component changes. Triggered when the index of the currently displayed component changes.
......
en/application-dev/reference/arkui-ts/ts-universal-attributes-image-effect.md
浏览文件 @ 3bc24b2e
# Image Effect Configuration # Image Effects
Image effects include background blur, content blur, grayscale, and much more.
> **NOTE** > **NOTE**
>
> This attribute is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version. > This attribute is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.
...@@ -15,28 +17,30 @@ None ...@@ -15,28 +17,30 @@ None
| Name | Type | Default Value | Description | | Name | Type | Default Value | Description |
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| blur | number | - | Adds the content blurring for the current component. The input parameter is the blur radius. The larger the radius is, the more blurred the content is. If the value is **0**, the content is not blurred. | | blur | number | - | Adds the content blur effect to the current component. The input parameter is the blur radius. The larger the radius is, the more blurred the content is. If the value is **0**, the content is not blurred. |
| backdropBlur | number | - | Adds the background blur effect for the current component. The input parameter is the blur radius. The larger the radius is, the more blurred the background is. If the value is **0**, the background is not blurred. | | backdropBlur | number | - | Adds the background blur effect to the current component. The input parameter is the blur radius. The larger the radius is, the more blurred the background is. If the value is **0**, the background is not blurred. |
| shadow | {<br/>radius: number,<br/>color?: Color,<br/>offsetX?: number,<br/>offsetY?: number<br/>} | - | Adds the shadow effect to the current component. The input parameters are the fuzzy radius (mandatory), shadow color (optional; gray by default), X-axis offset (optional and 0 by default), and Y-axis offset (optional; 0 by default). The offset unit is px. | | shadow | {<br/>radius: number,<br/>color?: Color \| string \| [Resource](../../ui/ts-types.md#resource-type),<br/>offsetX?: number,<br/>offsetY?: number<br/>} | - | Adds the shadow effect to the current component. The input parameters are the fuzzy radius (mandatory), shadow color (optional; gray by default), X-axis offset (optional and 0 by default), and Y-axis offset (optional; 0 by default). The offset unit is px. |
| grayscale | number | 0.0 | The value indicates the grayscale conversion ratio. If the input value is **1.0**, the image is converted into a grayscale image. If the input value is **0.0**, the image does not change. If the input value is between **0.0** and **1.0**, the effect changes in linear mode. The unit is percentage. The unit is percentage. | | grayscale | number | 0.0 | Converts the input image to grayscale. The value indicates the grayscale conversion ratio. If the input value is **1.0**, the image is converted into a grayscale image. If the input value is **0.0**, the image does not change. If the input value is between **0.0** and **1.0**, the effect changes in linear mode. The unit is percentage. The unit is percentage. |
| brightness | number | 1.0 | Adds a brightness to the current component. The input parameter is a brightness ratio. The value **1** indicates no effects. The value **0** indicates the complete darkness. If the value is less than **1**, the brightness decreases. If the value is greater than **1**, the brightness increases. A larger value indicates a higher brightness. | | brightness | number | 1.0 | Adds a brightness to the current component. The input parameter is a brightness ratio. The value **1** indicates no effects. The value **0** indicates the complete darkness. If the value is less than **1**, the brightness decreases. If the value is greater than **1**, the brightness increases. A larger value indicates a higher brightness. |
| saturate | number | 1.0 | Adds the saturation effect to the current component. The saturation is the ratio of the chromatic component to the achromatic component (gray) in a color. When the input value is **1**, the source image is displayed. When the input value is greater than **1**, a higher percentage of the chromatic component indicates a higher saturation. When the input value is less than **1**, a higher percentage of the achromatic component indicates a lower saturation. The unit is percentage. | | saturate | number | 1.0 | Adds the saturation effect to the current component. The saturation is the ratio of the chromatic component to the achromatic component (gray) in a color. When the input value is **1**, the source image is displayed. When the input value is greater than **1**, a higher percentage of the chromatic component indicates a higher saturation. When the input value is less than **1**, a higher percentage of the achromatic component indicates a lower saturation. The unit is percentage. |
| contrast | number | 1.0 | Adds the contrast effect to the current component. The input parameter is a contrast value. If the value is **1**, the source image is displayed. If the value is greater than **1**, a larger value indicates a higher contrast and a clearer image. If the value is less than **1**, a smaller value indicates a lower contrast is. If the value is **0**, the image becomes all gray. The unit is percentage. | | contrast | number | 1.0 | Adds the contrast effect to the current component. The input parameter is a contrast value. If the value is **1**, the source image is displayed. If the value is greater than **1**, a larger value indicates a higher contrast and a clearer image. If the value is less than **1**, a smaller value indicates a lower contrast is. If the value is **0**, the image becomes all gray. The unit is percentage. |
| invert | number | 0 | Inverts the input image. The input parameter is an image inversion ratio. The value **1** indicates complete inversion. The value **0** indicates that the image does not change. The unit is percentage. | | invert | number | 0 | Inverts the input image. The input parameter is an image inversion ratio. The value **1** indicates complete inversion. The value **0** indicates that the image does not change. The unit is percentage. |
| colorBlend <sup>8+</sup> | Color | - | Adds the color blend effect to the current component. The input parameter is the blended color. | | colorBlend<sup>8+</sup> | Color | - | Adds the color blend effect to the current component. The input parameter is the blended color. |
| sepia | number | 0 | Converts the image color to sepia. The input parameter is an image inversion ratio. The value **1** indicates the image is completely sepia. The value **0** indicates that the image does not change. The unit is percentage. | | sepia | number | 0 | Converts the image color to sepia. The input parameter is an image inversion ratio. The value **1** indicates the image is completely sepia. The value **0** indicates that the image does not change. The unit is percentage. |
| hueRotate | number \| string | '0deg' |Adds the hue rotation effect to the current component. The input parameter is a rotation angle. If the input value is **0deg**, the image does not change (because the default rotation angle is **0deg**). The input parameter does not have the maximum value. If the value exceeds **360deg**, the image is rotated for one more circle. In other words, the value **370deg** has the same effect as **10deg**.| | hueRotate | number \| string | '0deg' | Adds the hue rotation effect to the current component. The input parameter is a rotation angle. If the input value is **0deg**, the image does not change (because the default rotation angle is **0deg**). The input parameter does not have the maximum value. If the value exceeds **360deg**, the image is rotated for one more circle. In other words, the value **370deg** has the same effect as **10deg**.|
## Example ## Example
You can preview how this component looks on a real device. The preview is not yet available in the DevEco Studio Previewer.
``` ```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ImageEffectsExample { struct ImageEffectsExample {
build() { build() {
Column({space: 10}) { Column({space: 10}) {
// Blur the font. // Blur the font.
Text('font blur').fontSize(15).fontColor(0xCCCCCC).width('90%') Text('font blur').fontSize(15).fontColor(0xCCCCCC).width('90%')
Text('text').blur(3).width('90%').height(40) Text('text').blur(3).width('90%').height(40)
......
en/application-dev/ui/js-framework-syntax-css.md
浏览文件 @ 3bc24b2e
...@@ -85,11 +85,11 @@ The following is an example: ...@@ -85,11 +85,11 @@ The following is an example:
```css ```css
/* Page style xxx.css */ /* Page style xxx.css */
/\* Set the style for all <div> components. \*/ /* Set the style for all <div> components. */
div { div {
flex-direction: column; flex-direction: column;
} }
/* Set the style for the component whose class is title. */ /* Set the style for the component whose class is title.*/
.title { .title {
font-size: 30px; font-size: 30px;
} }
...@@ -101,13 +101,13 @@ div { ...@@ -101,13 +101,13 @@ div {
.title, .content { .title, .content {
padding: 5px; padding: 5px;
} }
/\* Set the style for all texts of components whose class is container.\*/ /* Set the style for all texts of components whose class is container.*/
.container text { .container text {
color: \#007dff; color: \#007dff;
} }
/\* Set the style for direct descendant texts of components whose class is container.\*/ /* Set the style for direct descendant texts of components whose class is container.*/
.container &gt; text { .container &gt; text {
color: \#fa2a2d; color: #fa2a2d;
} }
``` ```
...@@ -128,7 +128,7 @@ When multiple selectors point to the same element, their priorities are as follo ...@@ -128,7 +128,7 @@ When multiple selectors point to the same element, their priorities are as follo
A CSS pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s). For example, :disabled can be used to select the element whose disabled attribute is true. A CSS pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s). For example, :disabled can be used to select the element whose disabled attribute is true.
In addition to a single pseudo-class, a combination of pseudo-classes is supported. For example, **:focus:checked** selects the element whose focus and checked attributes are both set to true. The following table lists the supported single pseudo-class in descending order of priority. In addition to a single pseudo-class, a combination of pseudo-classes is supported. For example, :focus:checked selects the element whose focus and checked attributes are both set to true. The following table lists the supported single pseudo-class in descending order of priority.
| Pseudo-class | Available Components | Description | | Pseudo-class | Available Components | Description |
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en/application-dev/ui/ts-application-states-appstorage.md
浏览文件 @ 3bc24b2e
...@@ -21,7 +21,7 @@ By default, the attributes in the AppStorage are changeable. If needed, AppStora ...@@ -21,7 +21,7 @@ By default, the attributes in the AppStorage are changeable. If needed, AppStora
| Set | key: string,<br/>newValue: T | void | Replaces the value of a saved key. | | Set | key: string,<br/>newValue: T | void | Replaces the value of a saved key. |
| Link | key: string | @Link | Returns two-way binding to this attribute if there is data with a given key. This means that attribute changes made by a variable or component will be synchronized to the AppStorage, and attribute changes made through the AppStorage will be synchronized to the variable or component. If the attribute with this key does not exist or is read-only, undefined is returned. | | Link | key: string | @Link | Returns two-way binding to this attribute if there is data with a given key. This means that attribute changes made by a variable or component will be synchronized to the AppStorage, and attribute changes made through the AppStorage will be synchronized to the variable or component. If the attribute with this key does not exist or is read-only, undefined is returned. |
| SetAndProp | propName: string,<br/>defaultValue: S | @Prop | Works in a way similar to the Prop API. If the current key is stored in the AppStorage, the value corresponding to the key is returned. If the key has not been created, a Prop instance corresponding to the default value is created and returned. | | SetAndProp | propName: string,<br/>defaultValue: S | @Prop | Works in a way similar to the Prop API. If the current key is stored in the AppStorage, the value corresponding to the key is returned. If the key has not been created, a Prop instance corresponding to the default value is created and returned. |
| Prop | key: string | @Prop | Returns one-way binding to an attribute with a given key if the attribute exists. This means that attribute changes made through the AppStorage will be synchronized to the variable or component, but attribute changes made by the variable or component will be synchronized to the AppStorage. The variable returned by this method is an immutable one, which is applicable both to the variable and immutable state attributes. If the attribute with the specified key does not exist, undefined is returned.<br/>> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**:<br/>> The attribute value used in the prop method must be of a simple type. | | Prop | key: string | @Prop | Returns one-way binding to an attribute with a given key if the attribute exists. This means that attribute changes made through the AppStorage will be synchronized to the variable or component, but attribute changes made by the variable or component will be synchronized to the AppStorage. The variable returned by this method is an immutable one, which is applicable both to the variable and immutable state attributes. If the attribute with the specified key does not exist, undefined is returned.<br/>**NOTE**<br/>The attribute value used in the prop method must be of a simple type. |
| SetOrCreate | key: string,<br/>newValue: T | boolean | If an attribute that has the same name as the specified key exists: replaces the value of the attribute and returns true when the attribute can be modified; retains the original value of the attribute and returns false otherwise.<br/>If an attribute that has the same name as the specified key does not exist: creates an attribute whose key is key and value is newValue. The values null and undefined are not supported. | | SetOrCreate | key: string,<br/>newValue: T | boolean | If an attribute that has the same name as the specified key exists: replaces the value of the attribute and returns true when the attribute can be modified; retains the original value of the attribute and returns false otherwise.<br/>If an attribute that has the same name as the specified key does not exist: creates an attribute whose key is key and value is newValue. The values null and undefined are not supported. |
| Get | key: string | T or undefined | Obtains the value of the specified key. | | Get | key: string | T or undefined | Obtains the value of the specified key. |
| Has | propName: string | boolean | Checks whether the attribute corresponding to the specified key value exists. | | Has | propName: string | boolean | Checks whether the attribute corresponding to the specified key value exists. |
...@@ -51,9 +51,8 @@ One-way data binding can be established between components and the AppStorage th ...@@ -51,9 +51,8 @@ One-way data binding can be established between components and the AppStorage th
## Example ## Example
``` ```ts
let varA = AppStorage.Link('varA') // xxx.ets
let envLang = AppStorage.Prop('languageCode')
@Entry @Entry
@Component @Component
......
en/application-dev/ui/ts-resource-access.md
浏览文件 @ 3bc24b2e
...@@ -5,10 +5,13 @@ ...@@ -5,10 +5,13 @@
To reference an application resource in a project, use the `"$r('app.type.name')"` format. **app** indicates the resource defined in the **resources** directory of the application. **type** indicates the resource type (or the location where the resource is stored). The value can be **color**, **float**, **string**, **plural**, or **media**. **name** indicates the resource name, which you set when defining the resource. To reference an application resource in a project, use the `"$r('app.type.name')"` format. **app** indicates the resource defined in the **resources** directory of the application. **type** indicates the resource type (or the location where the resource is stored). The value can be **color**, **float**, **string**, **plural**, or **media**. **name** indicates the resource name, which you set when defining the resource.
When referencing resources in the **rawfile** sub-directory, use the `"$rawfile('filename')"` format. Currently, **$rawfile** allows only the **\<Image>** component to reference image resources. **filename** indicates the relative path of a file in the **rawfile** directory, and the file name must contain the file name extension. Note that the relative path cannot start with a slash (/). When referencing resources in the **rawfile** sub-directory, use the ```"$rawfile('filename')"``` format. **filename** indicates the relative path of a file in the **rawfile** directory, and the file name must contain the file name extension. Note that the relative path cannot start with a slash (/).
> **NOTE** > **NOTE**
>
> Resource descriptors accept only strings, such as `'app.type.name'`, and cannot be combined. > Resource descriptors accept only strings, such as `'app.type.name'`, and cannot be combined.
>
> `$r` returns a **Resource** object. To obtain the corresponding string, use [getString](../reference/apis/js-apis-resource-manager.md#getstring).
In the **.ets** file, you can use the resources defined in the **resources** directory. In the **.ets** file, you can use the resources defined in the **resources** directory.
...@@ -47,7 +50,7 @@ Image($rawfile('newDir/newTest.png')) // Reference an image in the rawfile direc ...@@ -47,7 +50,7 @@ Image($rawfile('newDir/newTest.png')) // Reference an image in the rawfile direc
System resources include colors, rounded corners, fonts, spacing, character strings, and images. By using system resources, you can develop different applications with the same visual style. System resources include colors, rounded corners, fonts, spacing, character strings, and images. By using system resources, you can develop different applications with the same visual style.
To reference a system resource, use the "$r('sys.type.resource_id')" format. Wherein: sys indicates a system resource; type indicates the resource type, which can be color, float, string, or media; resource_id indicates the resource ID, which is determined when the system resource is provided. For details about available system resource IDs. To reference a system resource, use the ```"$r('sys.type.resource_id')"``` format. Wherein: **sys** indicates a system resource; **type** indicates the resource type, which can be **color**, **float**, **string**, or **media**; **resource_id** indicates the resource ID.
```ts ```ts
Text('Hello') Text('Hello')
......
en/application-dev/ui/ts-syntactic-sugar.md
浏览文件 @ 3bc24b2e
# About Syntactic Sugar # About Syntactic Sugar
## Decorators ## Decorators
A decorator @Decorator can decorate a class, structure, or class attribute. Multiple decorators can be applied to the same target element and defined on a single line or multiple lines. It is recommended that the decorators be defined on multiple lines.
In the example below, the elements decorated by @Component take on the form of a component, and the variables decorated by @State can be used to represent states. A decorator **@Decorator** can decorate a class, structure, or class attribute. Multiple decorators can be applied to the same target element and defined on a single line or multiple lines. It is recommended that the decorators be defined on multiple lines.
``` In the example below, the elements decorated by **@Component** take on the form of a component, and the variables decorated by **@State** can be used to represent states.
```ts
@Component @Component
struct MyComponent { struct MyComponent {
@State count: number = 0 @State count: number = 0
} }
``` ```
Multiple decorators can be defined on a single line, as shown below: Multiple decorators can be defined on a single line, as shown below:
``` ```ts
@Entry @Component struct MyComponent { @Entry @Component struct MyComponent {
} }
``` ```
However, you are advised to define the decorators on multiple lines, as shown below: However, you are advised to define the decorators on multiple lines, as shown below:
``` ```ts
@Entry @Entry
@Component @Component
struct MyComponent { struct MyComponent {
...@@ -36,30 +39,29 @@ struct MyComponent { ...@@ -36,30 +39,29 @@ struct MyComponent {
### Supported Decorators ### Supported Decorators
| Decorator | Decorates... | Description | | Decorator | Decorates... | Description |
| -------- | -------- | -------- | | ------------- | ------------------------------------------------------------ | ------------------------------------------------------------ |
| @Component | struct | The decorated structure has the component-based capability. The build method must be implemented to update the UI. | | @Component | struct | The decorated structure has the component-based capability. The **build** method must be implemented to update the UI.|
| @Entry | struct | The decorated component is used as the entry of a page. The component is rendered and displayed when the page is loaded. | | @Entry | struct | The decorated component is used as the entry of a page. The component is rendered and displayed when the page is loaded. |
| @Preview | struct | Custom components decorated by @Preview can be previewed in the Previewer of DevEco Studio. When the page is loaded, the custom components decorated by @Preview are created and displayed. | | @Preview | struct | Custom components decorated by **@Preview** can be previewed in DevEco Studio. When the target page is loaded, the custom components decorated by **@Preview** are created and displayed.|
| @Builder | Methods | In the decorated method, you can use the declarative UI description to quickly generate multiple layouts in a custom component. | | @Builder | Methods | In the decorated method, you can use the declarative UI description to quickly generate multiple layouts in a custom component.|
| @Extend | Methods | This decorator adds new attribute functions to a preset component, allowing you to quickly define and reuse the custom style of the component. | | @Extend | Methods | This decorator adds attribute functions to a preset component, allowing you to quickly define and reuse the custom style of the component.|
| @CustomDialog | struct | This decorator is used to decorate custom pop-up dialog boxes. | | @CustomDialog | struct | This decorator is used to decorate custom pop-up dialog boxes. |
| @State | Primitive data types, classes, and arrays | If the decorated state data is modified, the build method of the component will be called to update the UI. | | @State | Primitive data types, classes, and arrays | If the decorated state data is modified, the **build** method of the component will be called to update the UI. |
| @Prop | Primitive data types | This decorator is used to establish one-way data binding between the parent and child components. When the data associated with the parent component is modified, the UI of the current component is updated. | | @Prop | Primitive data types | This decorator is used to establish one-way data binding between the parent and child components. When the data associated with the parent component is modified, the UI of the current component is updated.|
| @Link | Primitive data types, classes, and arrays | This decorator is used to establish two-way data binding between the parent and child components. The internal state data of the parent component is used as the data source. Any changes made to one component will be reflected to the other. | | @Link | Primitive data types, classes, and arrays | This decorator is used to establish two-way data binding between the parent and child components. The internal state data of the parent component is used as the data source. Any changes made to one component will be reflected to the other.|
| @Observed | Classes | This decorator is used to indicate that the data changes in the class will be managed by the UI page. | | @Observed | Classes | This decorator is used to indicate that the data changes in the class will be managed by the UI page. |
| @ObjectLink | Objects of @Observed decorated classes | When the decorated state variable is modified, the parent and sibling components that have the state variable will be notified for UI re-rendering. | | @ObjectLink | Objects of **@Observed** decorated classes | When the decorated state variable is modified, the parent and sibling components that have the state variable will be notified for UI re-rendering.|
| @Consume | Primitive data types, classes, and arrays | When the @Consume decorated variable detects the update of the @Provide decorated variable, the re-rendering of the current custom component is triggered. | | @Consume | Primitive data types, classes, and arrays | When the **@Consume** decorated variable detects the update of the **@Provide** decorated variable, the re-rendering of the current custom component is triggered.|
| @Provide | Primitive data types, classes, and arrays | As the data provider, @Provide can update the data of child nodes and trigger page rendering. | | @Provide | Primitive data types, classes, and arrays | As the data provider, **@Provide** can update the data of child nodes and trigger page rendering.|
| @Watch | Variables decorated by @State, @Prop, @Link, @ObjectLink, @Provide, @Consume, @StorageProp, or @StorageLink | This decorator is used to listen for the changes of the state variables. The application can register a callback method through @Watch. | | @Watch | Variables decorated by **@State**, **@Prop**, **@Link**, **@ObjectLink**, **@Provide**, **@Consume**, **@StorageProp**, or **@StorageLink** | This decorator is used to listen for the changes of the state variables. The application can register a callback method through **@Watch**. |
## Chain Call ## Chain Call
You can configure the UI structure and its attributes and events and separate them with a dot(.) to implement chain call. You can configure the UI structure and its attributes and events and separate them with a dot(.) to implement chain call.
```ts
```
Column() { Column() {
Image('1.jpg') Image('1.jpg')
.alt('error.jpg') .alt('error.jpg')
...@@ -71,10 +73,9 @@ Column() { ...@@ -71,10 +73,9 @@ Column() {
## struct ## struct
Components can be implemented based on structs. Components cannot inherit from each other. The structs implemented components can be created and destroyed more quickly than class implemented components. Components can be implemented based on **struct**s. Components cannot inherit from each other. The **struct**s implemented components can be created and destroyed more quickly than **class** implemented components.
```ts
```
@Component @Component
struct MyComponent { struct MyComponent {
@State data: string = '' @State data: string = ''
...@@ -87,10 +88,9 @@ struct MyComponent { ...@@ -87,10 +88,9 @@ struct MyComponent {
## Instantiating a struct Without the new Keyword ## Instantiating a struct Without the new Keyword
You can omit the new keyword when instantiating a struct. You can omit the **new** keyword when instantiating a **struct**.
``` ```ts
// Definition // Definition
@Component @Component
struct MyComponent { struct MyComponent {
...@@ -98,7 +98,7 @@ struct MyComponent { ...@@ -98,7 +98,7 @@ struct MyComponent {
} }
} }
// Use // Usage
Column() { Column() {
MyComponent() MyComponent()
} }
...@@ -114,23 +114,22 @@ new Column() { ...@@ -114,23 +114,22 @@ new Column() {
TypeScript has the following restrictions on generators: TypeScript has the following restrictions on generators:
- Expressions can be used only in character strings (${expression}), if conditions, ForEach parameters, and component parameters. - Expressions can be used only in character strings (${expression}), **if** conditions, **ForEach** parameters, and component parameters.
- No expressions should cause any application state variables (@State, @Link, and @Prop) to change. Otherwise, undefined and potentially unstable framework behavior may occur. - No expressions should cause any application state variables (**@State**, **@Link**, and **@Prop**) to change. Otherwise, undefined and potentially unstable framework behavior may occur.
- The generator function cannot contain local variables. - The generator function cannot contain local variables.
None of the above restrictions apply to anonymous function implementations of event-handling functions (such as onClick) None of the above restrictions apply to anonymous function implementations of event-handling functions (such as **onClick**)
Incorrect: Incorrect:
```ts
```
build() { build() {
let a: number = 1 // invalid: variable declaration not allowed let a: number = 1 // invalid: variable declaration not allowed
Column() { Column() {
Text('Hello ${this.myName.toUpperCase()}') // ok. Text(`Hello ${this.myName.toUpperCase()}`) // ok.
ForEach(this.arr.reverse(), ..., ...) // invalid: Array.reverse modifies the @State array varible in place ForEach(this.arr.reverse(), ..., ...) // invalid: Array.reverse modifies the @State array variable in place
} }
buildSpecial() // invalid: no function calls buildSpecial() // invalid: no function calls
Text(this.calcTextValue()) // this function call is ok. Text(this.calcTextValue()) // this function call is ok.
...@@ -139,11 +138,13 @@ build() { ...@@ -139,11 +138,13 @@ build() {
## $$ ## $$
$$ supports two-way binding for simple variables and @State, @Link, and @Prop decorated variables. **$$** supports two-way binding for simple variables and **@State**, **@Link**, and **@Prop** decorated variables.
Currently, $$ supports only the rendering between the show parameter of the bindPopup attribute and the @State decorated variable, and the checked attribute of the \<Radio> component. Currently, **$$** supports only the rendering between the **show** parameter of the **[bindPopup](../reference/arkui-ts/ts-universal-attributes-popup.md)** attribute and the **@State** decorated variable, and the **checked** attribute of the **\<Radio>** component.
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct bindPopup { struct bindPopup {
...@@ -166,3 +167,29 @@ struct bindPopup { ...@@ -166,3 +167,29 @@ struct bindPopup {
} }
``` ```
## Restrictions on Declaring Multiple Data Types of State Variables
If a **@State**, **@Provide**, **@Link**, or **@Consume** decorated state variable supports multiple data types, they must be all simple data types or references at one time.
Example:
```ts
@Entry
@Component
struct Index {
// Incorrect: @State message: string | Resource = 'Hello World'
@State message: string = 'Hello World'
build() {
Row() {
Column() {
Text(`${ this.message }`)
.fontSize(50)
.fontWeight(FontWeight.Bold)
}
.width('100%')
}
.height('100%')
}
}
```
en/application-dev/ui/ui-js-components-switch.md
浏览文件 @ 3bc24b2e
...@@ -9,14 +9,15 @@ The **&lt;switch&gt;** component is used to switch between the on and off states ...@@ -9,14 +9,15 @@ The **&lt;switch&gt;** component is used to switch between the on and off states
Create a **&lt;switch&gt;** component in the .hml file under **pages/index**. Create a **&lt;switch&gt;** component in the .hml file under **pages/index**.
``` ```html
<!-- xxx.hml -->
<div class="container"> <div class="container">
<switch></switch> <switch></switch>
</div> </div>
``` ```
``` ```css
/* xxx.css */ /* xxx.css */
.container { .container {
flex-direction: column; flex-direction: column;
...@@ -31,9 +32,9 @@ Create a **&lt;switch&gt;** component in the .hml file under **pages/index**. ...@@ -31,9 +32,9 @@ Create a **&lt;switch&gt;** component in the .hml file under **pages/index**.
## Adding Attributes and Methods ## Adding Attributes and Methods
Use the **textoff** and **showtext** attributes to set the status when text is selected and unselected. Set the **checked** attribute to **true** (indicating that the component is on). Add the **change** event that is triggered when the component status changes. After the event is triggered, the **switchChange** function is executed to obtain the current component status (on or off). Use the **textoff** and **showtext** attributes to set the status when text is selected and unselected. Set the **checked** attribute to **true** (indicating that the component is on). Add the **change** event that is triggered when the component status changes. After the event is triggered, the **switchChange** function is executed to obtain the current component status (on or off).
``` ```html
<!-- xxx.hml --> <!-- xxx.hml -->
<div class="container"> <div class="container">
<switch showtext="true" texton="open" textoff="close" checked="true" @change="switchChange"></switch> <switch showtext="true" texton="open" textoff="close" checked="true" @change="switchChange"></switch>
...@@ -41,28 +42,26 @@ Create a **&lt;switch&gt;** component in the .hml file under **pages/index**. ...@@ -41,28 +42,26 @@ Create a **&lt;switch&gt;** component in the .hml file under **pages/index**.
``` ```
``` ```css
/* xxx.css */ /* xxx.css */
.container { .container {
width: 100%; width: 100%;
height: 100%; height: 100%;
display: flex; display: flex;
justify-content: center; justify-content: center;
align-items: center; align-items: center;
background-color: #F1F3F5; background-color: #F1F3F5;
} }
switch{ switch {
// Color of the selected text
texton-color: #002aff; texton-color: #002aff;
// Color of the unselected text textoff-color: silver;
textoff-color: silver;
text-padding: 20px; text-padding: 20px;
font-size: 50px; font-size: 50px;
} }
``` ```
``` ```js
// xxx.js // xxx.js
import prompt from '@system.prompt'; import prompt from '@system.prompt';
export default { export default {
...@@ -84,7 +83,8 @@ export default { ...@@ -84,7 +83,8 @@ export default {
![en-us_image_0000001276003505](figures/en-us_image_0000001276003505.gif) ![en-us_image_0000001276003505](figures/en-us_image_0000001276003505.gif)
> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE:** > **NOTE**
>
> The text set by **texton** and **textoff** takes effect only when **showtext** is set to **true**. > The text set by **texton** and **textoff** takes effect only when **showtext** is set to **true**.
...@@ -94,7 +94,7 @@ Turn on the switch and the default delivery address is used. When the switch is ...@@ -94,7 +94,7 @@ Turn on the switch and the default delivery address is used. When the switch is
Implementation method: Create a **&lt;switch&gt;** component, set the **checked** attribute to **true**, and change the delivery address through data binding. Set the **display** attribute (the default value is **none**). When the switch is turned off and the **display** attribute is set to **flex**, the address module is displayed and clicking the button can change the color. Implementation method: Create a **&lt;switch&gt;** component, set the **checked** attribute to **true**, and change the delivery address through data binding. Set the **display** attribute (the default value is **none**). When the switch is turned off and the **display** attribute is set to **flex**, the address module is displayed and clicking the button can change the color.
``` ```html
<!-- xxx.hml --> <!-- xxx.hml -->
<div class="container"> <div class="container">
<div class="change"> <div class="change">
...@@ -113,11 +113,11 @@ Turn on the switch and the default delivery address is used. When the switch is ...@@ -113,11 +113,11 @@ Turn on the switch and the default delivery address is used. When the switch is
``` ```
``` ```css
/* xxx.css */ /* xxx.css */
.container { .container {
width: 100%; width: 100%;
height: 100%; height: 100%;
background-color: #F1F3F5; background-color: #F1F3F5;
flex-direction: column; flex-direction: column;
padding: 50px; padding: 50px;
...@@ -168,7 +168,7 @@ switch{ ...@@ -168,7 +168,7 @@ switch{
``` ```
``` ```js
// xxx.js // xxx.js
import prompt from '@system.prompt'; import prompt from '@system.prompt';
export default { export default {
......
en/device-dev/driver/driver-platform-uart-des.md
浏览文件 @ 3bc24b2e
# UART<a name="EN-US_TOPIC_0000001160652800"></a> # UART
## Overview<a name="section833012453535"></a>
The Universal Asynchronous Receiver/Transmitter \(UART\) is a universal serial data bus used for asynchronous communication. It enables bi-directional communication between devices in full-duplex mode. ## Overview
The Universal Asynchronous Receiver/Transmitter (UART) is a universal serial data bus used for asynchronous communication. It enables bi-directional communication between devices in full-duplex mode.
UART is widely used to print information for debugging or to connect to various external modules such as GPS and Bluetooth. UART is widely used to print information for debugging or to connect to various external modules such as GPS and Bluetooth.
A UART is connected to other modules through two wires \(as shown in [Figure 1](#fig68294715408)\) or four wires \(as shown in [Figure 2](#fig179241542163112)\).
- TX: TX pin of the transmitting UART. It is connected to the RX pin of the peer UART. A UART is connected to other modules through two wires (as shown in Figure 1) or four wires (as shown in Figure 2).
- RX: RX pin of the receiving UART. It is connected to the TX pin of the peer UART. - TX: TX pin of the transmitting UART. It is connected to the RX pin of the peer UART.
- RTS: Request to Send signal pin. It is connected to the CTS pin of the peer UART and is used to indicate whether the local UART is ready to receive data. - RX: RX pin of the receiving UART. It is connected to the TX pin of the peer UART.
- CTS: Clear to Send signal pin. It is connected to the RTS pin of the peer UART and is used to indicate whether the local UART is allowed to send data to the peer end. - RTS: Request to Send signal pin. It is connected to the CTS pin of the peer UART and is used to indicate whether the local UART is ready to receive data.
- CTS: Clear to Send signal pin. It is connected to the RTS pin of the peer UART and is used to indicate whether the local UART is allowed to send data to the peer end.
**Figure 1** 2-wire UART communication<a name="fig68294715408"></a>
![](figures/2-wire-uart-communication.png "2-wire-uart-communication") **Figure 1** Two-wire UART communication
**Figure 2** 4-wire UART communication<a name="fig179241542163112"></a> ![](figures/2-wire-uart-communication.png "2-wire-uart-communication")
![](figures/4-wire-uart-communication.png "4-wire-uart-communication")
**Figure 2** Four-wire UART communication
The transmitting and receiving UARTs must ensure that they have the same settings on particular attributes such as the baud rate and data format \(start bit, data bit, parity bit, and stop bit\) before they start to communicate. During data transmission, a UART sends data to the peer end over the TX pin and receives data from the peer end over the RX pin. When the size of the buffer used by a UART for storing received data reaches the preset threshold, the RTS signal of the UART changes to **1** \(data cannot be received\), and the peer UART stops sending data to it because its CTS signal does not allow it to send data. ![](figures/4-wire-uart-communication.png "4-wire-uart-communication")
- The transmitting and receiving UARTs must ensure that they have the same settings on particular attributes such as the baud rate and data format (start bit, data bit, parity bit, and stop bit) before they start to communicate. During data transmission, a UART sends data to the peer end over the TX pin and receives data from the peer end over the RX pin. When the size of the buffer used by a UART for storing received data reaches the preset threshold, the RTS signal of the UART changes to **1** (data cannot be received), and the peer UART stops sending data to it because its CTS signal does not allow it to send data.
## Available APIs<a name="section1928742202715"></a>
- The UART interface defines a set of common functions for operating a UART port, including obtaining and releasing device handles, reading and writing data of a specified length, and obtaining and setting the baud rate, as well as the device attributes.
The UART interface defines a set of common functions for operating a UART port, including obtaining and releasing device handles, reading and writing data of a specified length, and obtaining and setting the baud rate, as well as the device attributes.
**Table 1** APIs for the UART driver ## Available APIs
<a name="table1731550155318"></a> **Table 1** UART driver APIs
<table><thead align="left"><tr id="row1223152681611"><th class="cellrowborder" valign="top" width="26.619999999999997%" id="mcps1.2.4.1.1"><p id="p210413571619"><a name="p210413571619"></a><a name="p210413571619"></a><strong id="b4100105545211"><a name="b4100105545211"></a><a name="b4100105545211"></a>Capability</strong></p>
</th> | API| Description|
<th class="cellrowborder" valign="top" width="31.369999999999997%" id="mcps1.2.4.1.2"><p id="p810403511614"><a name="p810403511614"></a><a name="p810403511614"></a><strong id="b1653121711186"><a name="b1653121711186"></a><a name="b1653121711186"></a>Function</strong></p> | -------- | -------- |
</th> | UartOpen | Obtains a UART device handle.|
<th class="cellrowborder" valign="top" width="42.01%" id="mcps1.2.4.1.3"><p id="p110418354161"><a name="p110418354161"></a><a name="p110418354161"></a><strong id="b69108168153412"><a name="b69108168153412"></a><a name="b69108168153412"></a>Description</strong></p> | UartClose | Releases a UART device handle.|
</th> | UartRead | Reads data of the specified length from a UART device.|
</tr> | UartWrite | Writes data of the specified length to a UART device.|
</thead> | UartGetBaud | Obtains the UART baud rate.|
<tbody><tr id="row1638573613415"><td class="cellrowborder" rowspan="2" valign="top" width="26.619999999999997%" headers="mcps1.2.4.1.1 "><p id="p917154316414"><a name="p917154316414"></a><a name="p917154316414"></a>Obtaining and releasing device handles</p> | UartSetBaud | Sets the UART baud rate.|
<p id="p9596111154212"><a name="p9596111154212"></a><a name="p9596111154212"></a></p> | UartGetAttribute | Obtains UART device attributes.|
</td> | UartSetAttribute | Sets UART device attributes.|
<td class="cellrowborder" valign="top" width="31.369999999999997%" headers="mcps1.2.4.1.2 "><p id="p20385163614412"><a name="p20385163614412"></a><a name="p20385163614412"></a>UartOpen</p> | UartSetTransMode | Sets the UART transmission mode.|
</td>
<td class="cellrowborder" valign="top" width="42.01%" headers="mcps1.2.4.1.3 "><p id="p12101135184213"><a name="p12101135184213"></a><a name="p12101135184213"></a>Obtains the UART device handle.</p> > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br>
</td> > All APIs described in this document can be called only in kernel mode.
</tr>
<tr id="row5950143316415"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p149501733134113"><a name="p149501733134113"></a><a name="p149501733134113"></a>UartClose</p>
</td> ## Usage Guidelines
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p371073520422"><a name="p371073520422"></a><a name="p371073520422"></a>Releases a specified UART device handle.</p>
</td>
</tr> ### How to Use
<tr id="row34145016535"><td class="cellrowborder" rowspan="2" valign="top" width="26.619999999999997%" headers="mcps1.2.4.1.1 "><p id="p229610227124"><a name="p229610227124"></a><a name="p229610227124"></a>Reading and writing data</p>
<p id="p131072201215"><a name="p131072201215"></a><a name="p131072201215"></a></p>
</td>
<td class="cellrowborder" valign="top" width="31.369999999999997%" headers="mcps1.2.4.1.2 "><p id="p8296182221219"><a name="p8296182221219"></a><a name="p8296182221219"></a>UartRead</p>
</td>
<td class="cellrowborder" valign="top" width="42.01%" headers="mcps1.2.4.1.3 "><p id="p16297172213125"><a name="p16297172213125"></a><a name="p16297172213125"></a>Reads data of a specified length from a UART device.</p>
</td>
</tr>
<tr id="row11585016539"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1095722493616"><a name="p1095722493616"></a><a name="p1095722493616"></a>UartWrite</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15297162215122"><a name="p15297162215122"></a><a name="p15297162215122"></a>Writes data of a specified length into a UART device.</p>
</td>
</tr>
<tr id="row8687115843715"><td class="cellrowborder" rowspan="2" valign="top" width="26.619999999999997%" headers="mcps1.2.4.1.1 "><p id="p196317143813"><a name="p196317143813"></a><a name="p196317143813"></a>Obtaining and setting the baud rate</p>
</td>
<td class="cellrowborder" valign="top" width="31.369999999999997%" headers="mcps1.2.4.1.2 "><p id="p166885582375"><a name="p166885582375"></a><a name="p166885582375"></a>UartGetBaud</p>
</td>
<td class="cellrowborder" valign="top" width="42.01%" headers="mcps1.2.4.1.3 "><p id="p13688358183716"><a name="p13688358183716"></a><a name="p13688358183716"></a>Obtains the UART baud rate.</p>
</td>
</tr>
<tr id="row18987529382"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p698719214383"><a name="p698719214383"></a><a name="p698719214383"></a>UartSetBaud</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1398712123810"><a name="p1398712123810"></a><a name="p1398712123810"></a>Sets the UART baud rate.</p>
</td>
</tr>
<tr id="row1551850115317"><td class="cellrowborder" rowspan="2" valign="top" width="26.619999999999997%" headers="mcps1.2.4.1.1 "><p id="p1629782201218"><a name="p1629782201218"></a><a name="p1629782201218"></a>Obtaining and setting device attributes</p>
<p id="p10308192211216"><a name="p10308192211216"></a><a name="p10308192211216"></a></p>
</td>
<td class="cellrowborder" valign="top" width="31.369999999999997%" headers="mcps1.2.4.1.2 "><p id="p32972022151218"><a name="p32972022151218"></a><a name="p32972022151218"></a>UartGetAttribute</p>
</td>
<td class="cellrowborder" valign="top" width="42.01%" headers="mcps1.2.4.1.3 "><p id="p13297122216123"><a name="p13297122216123"></a><a name="p13297122216123"></a>Obtains the UART device attributes.</p>
</td>
</tr>
<tr id="row7545065311"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p102974224120"><a name="p102974224120"></a><a name="p102974224120"></a>UartSetAttribute</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p152971322111219"><a name="p152971322111219"></a><a name="p152971322111219"></a>Sets the UART device attributes.</p>
</td>
</tr>
<tr id="row14614115403"><td class="cellrowborder" valign="top" width="26.619999999999997%" headers="mcps1.2.4.1.1 "><p id="p1746281144010"><a name="p1746281144010"></a><a name="p1746281144010"></a>Setting the transmission mode</p>
</td>
<td class="cellrowborder" valign="top" width="31.369999999999997%" headers="mcps1.2.4.1.2 "><p id="p1146215112405"><a name="p1146215112405"></a><a name="p1146215112405"></a>UartSetTransMode</p>
</td>
<td class="cellrowborder" valign="top" width="42.01%" headers="mcps1.2.4.1.3 "><p id="p11303181216414"><a name="p11303181216414"></a><a name="p11303181216414"></a>Sets the UART transmission mode.</p>
</td>
</tr>
</tbody>
</table>
>![](../public_sys-resources/icon-note.gif) **NOTE**<br>
>All functions provided in this document can be called only in kernel space.
## Usage Guidelines<a name="section12779050105412"></a>
### How to Use<a name="section1858116395510"></a>
The figure below illustrates how to use the APIs. The figure below illustrates how to use the APIs.
**Figure 3** Using UART driver APIs<a name="fig99673244388"></a> **Figure 3** Using UART driver APIs
![](figures/using-uart-process.png "process-of-using-a-uart-device")
![](figures/using-UART-process.png)
### Obtaining a UART Device Handle<a name="section124512065617"></a>
Before performing UART communication, call **UartOpen** to obtain a UART device handle. This function returns the pointer to the UART device handle with a specified port number. ### Opening a UART Device Handle
DevHandle UartOpen\(uint32\_t port\); Before performing UART communication, call **UartOpen** to obtain a UART device handle. This function returns the pointer to the UART device handle with the specified port number.
**Table 2** Description of UartOpen
```
<a name="table14222165114310"></a> DevHandle UartOpen(uint32_t port);
<table><thead align="left"><tr id="row1022175133111"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p13221551153117"><a name="p13221551153117"></a><a name="p13221551153117"></a><strong id="b538194163718"><a name="b538194163718"></a><a name="b538194163718"></a>Parameter</strong></p> ```
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p122211251103111"><a name="p122211251103111"></a><a name="p122211251103111"></a><strong id="b20924204203714"><a name="b20924204203714"></a><a name="b20924204203714"></a>Description</strong></p> **Table 2** Description of UartOpen
</th>
</tr> | Parameter| Description|
</thead> | -------- | -------- |
<tbody><tr id="row6222451133114"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p92221518315"><a name="p92221518315"></a><a name="p92221518315"></a>port</p> | port | UART port number.|
</td> | **Return Value**| **Description**|
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1322217518318"><a name="p1322217518318"></a><a name="p1322217518318"></a>UART port number.</p> | NULL | The operation failed.|
</td> | Device handle| The operation is successful. The obtained UART device handle is returned.|
</tr>
<tr id="row1122245153112"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p102221451123118"><a name="p102221451123118"></a><a name="p102221451123118"></a><strong id="b101754483378"><a name="b101754483378"></a><a name="b101754483378"></a>Return Value</strong></p> Example: Obtain the device handle of UART port 3.
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1122215143113"><a name="p1122215143113"></a><a name="p1122215143113"></a><strong id="b647184919374"><a name="b647184919374"></a><a name="b647184919374"></a>Description</strong></p> ```
</td> DevHandle handle = NULL; /* UART device handle */
</tr> uint32_t port = 3; /* UART port number */
<tr id="row522275114317"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p422235114313"><a name="p422235114313"></a><a name="p422235114313"></a>NULL</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p5222351203112"><a name="p5222351203112"></a><a name="p5222351203112"></a>Failed to obtain the UART device handle.</p>
</td>
</tr>
<tr id="row1222212513311"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p5222125115316"><a name="p5222125115316"></a><a name="p5222125115316"></a>Device handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p192228515311"><a name="p192228515311"></a><a name="p192228515311"></a>UART device handle.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to obtain a UART device handle based on the assumption that the UART port number is **3**:
```
DevHandle handle = NULL; /* The UART device handle */
uint32_t port = 3; /* UART port number */
handle = UartOpen(port); handle = UartOpen(port);
if (handle == NULL) { if (handle == NULL) {
HDF_LOGE("UartOpen: failed!\n"); HDF_LOGE("UartOpen: failed!\n");
...@@ -158,51 +88,29 @@ if (handle == NULL) { ...@@ -158,51 +88,29 @@ if (handle == NULL) {
} }
``` ```
### Setting the UART Baud Rate<a name="section86881004579"></a>
After obtaining the UART device handle, set the UART baud rate by calling the following function:
int32\_t UartSetBaud\(DevHandle handle, uint32\_t baudRate\);
**Table 3** Description of UartSetBaud
<a name="table539135313325"></a>
<table><thead align="left"><tr id="row15391205311323"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p11390453103216"><a name="p11390453103216"></a><a name="p11390453103216"></a><strong id="b0704124143717"><a name="b0704124143717"></a><a name="b0704124143717"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p839065316328"><a name="p839065316328"></a><a name="p839065316328"></a><strong id="b10127164520376"><a name="b10127164520376"></a><a name="b10127164520376"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row2039115373216"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p1639165310324"><a name="p1639165310324"></a><a name="p1639165310324"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p539115320328"><a name="p539115320328"></a><a name="p539115320328"></a>UART device handle.</p>
</td>
</tr>
<tr id="row163911753143214"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p13911653203215"><a name="p13911653203215"></a><a name="p13911653203215"></a>baudRate</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p163919537322"><a name="p163919537322"></a><a name="p163919537322"></a>Baud rate of the UART to set.</p>
</td>
</tr>
<tr id="row539155343218"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p1039185313321"><a name="p1039185313321"></a><a name="p1039185313321"></a><strong id="b1551834812373"><a name="b1551834812373"></a><a name="b1551834812373"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p123911753143213"><a name="p123911753143213"></a><a name="p123911753143213"></a><strong id="b43667492373"><a name="b43667492373"></a><a name="b43667492373"></a>Description</strong></p>
</td>
</tr>
<tr id="row2391853153218"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p17391185310322"><a name="p17391185310322"></a><a name="p17391185310322"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p14391653193210"><a name="p14391653193210"></a><a name="p14391653193210"></a>Succeeded in setting the UART baud rate.</p>
</td>
</tr>
<tr id="row23912053143211"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p7391165320321"><a name="p7391165320321"></a><a name="p7391165320321"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p639185318322"><a name="p639185318322"></a><a name="p639185318322"></a>Failed to set the UART baud rate.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to set the UART baud rate to **9600**:
### Setting the UART Baud Rate
Call **UartSetBaud()** to set the UART baud rate.
```
int32_t UartSetBaud(DevHandle handle, uint32_t baudRate);
```
**Table 3** Description of UartSetBaud
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| baudRate | Baud rate to set.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Set the UART baud rate to **9600**.
``` ```
int32_t ret; int32_t ret;
/* Set the UART baud rate to 9600. */ /* Set the UART baud rate to 9600. */
...@@ -212,51 +120,29 @@ if (ret != 0) { ...@@ -212,51 +120,29 @@ if (ret != 0) {
} }
``` ```
### Obtaining the UART Baud Rate<a name="section897032965712"></a>
After setting the UART baud rate, obtain the current baud rate by calling the following function:
int32\_t UartGetBaud\(DevHandle handle, uint32\_t \*baudRate\);
**Table 4** Description of UartGetBaud
<a name="table20393185311326"></a>
<table><thead align="left"><tr id="row19392653123215"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p6392105315326"><a name="p6392105315326"></a><a name="p6392105315326"></a><strong id="b13706541173716"><a name="b13706541173716"></a><a name="b13706541173716"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p53920531329"><a name="p53920531329"></a><a name="p53920531329"></a><strong id="b15128194510378"><a name="b15128194510378"></a><a name="b15128194510378"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row103921553103211"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p1539220536326"><a name="p1539220536326"></a><a name="p1539220536326"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p6392553203217"><a name="p6392553203217"></a><a name="p6392553203217"></a>UART device handle.</p>
</td>
</tr>
<tr id="row1539211532322"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p93921053123210"><a name="p93921053123210"></a><a name="p93921053123210"></a>baudRate</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p93926536328"><a name="p93926536328"></a><a name="p93926536328"></a>Pointer to the UART baud rate.</p>
</td>
</tr>
<tr id="row1239318531326"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p17392653123213"><a name="p17392653123213"></a><a name="p17392653123213"></a><strong id="b55191048113716"><a name="b55191048113716"></a><a name="b55191048113716"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1339365316327"><a name="p1339365316327"></a><a name="p1339365316327"></a><strong id="b193671249193713"><a name="b193671249193713"></a><a name="b193671249193713"></a>Description</strong></p>
</td>
</tr>
<tr id="row143939531328"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p2393953153213"><a name="p2393953153213"></a><a name="p2393953153213"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p8393165383218"><a name="p8393165383218"></a><a name="p8393165383218"></a>Succeeded in obtaining the UART baud rate.</p>
</td>
</tr>
<tr id="row5393105363210"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p17393125363215"><a name="p17393125363215"></a><a name="p17393125363215"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1539325393211"><a name="p1539325393211"></a><a name="p1539325393211"></a>Failed to obtain the UART baud rate.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to obtain the UART baud rate:
### Obtaining the UART Baud Rate
Call **UartGetBaud()** to obtain the UART baud rate.
```
int32_t UartGetBaud(DevHandle handle, uint32_t *baudRate);
```
**Table 4** Description of UartGetBaud
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| baudRate | Pointer to the UART baud rate obtained.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Obtain the UART baud rate.
``` ```
int32_t ret; int32_t ret;
uint32_t baudRate; uint32_t baudRate;
...@@ -267,168 +153,102 @@ if (ret != 0) { ...@@ -267,168 +153,102 @@ if (ret != 0) {
} }
``` ```
### Setting the UART Device Attributes<a name="section129141884588"></a>
Before performing UART communication, set the UART device attributes by calling the following function:
int32\_t UartSetAttribute\(DevHandle handle, struct UartAttribute \*attribute\);
**Table 5** Description of UartSetAttribute
<a name="table1453119335341"></a>
<table><thead align="left"><tr id="row3530433103416"><th class="cellrowborder" valign="top" width="49.980000000000004%" id="mcps1.2.3.1.1"><p id="p1853073310341"><a name="p1853073310341"></a><a name="p1853073310341"></a><strong id="b8706441133719"><a name="b8706441133719"></a><a name="b8706441133719"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50.019999999999996%" id="mcps1.2.3.1.2"><p id="p553083393417"><a name="p553083393417"></a><a name="p553083393417"></a><strong id="b16129154519371"><a name="b16129154519371"></a><a name="b16129154519371"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row55303331347"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p1530113313341"><a name="p1530113313341"></a><a name="p1530113313341"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p3530173313346"><a name="p3530173313346"></a><a name="p3530173313346"></a>UART device handle.</p>
</td>
</tr>
<tr id="row45309337342"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p553083319348"><a name="p553083319348"></a><a name="p553083319348"></a>attribute</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p5530133314343"><a name="p5530133314343"></a><a name="p5530133314343"></a>Pointer to the UART device attributes to set.</p>
</td>
</tr>
<tr id="row12530833103415"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p185309331345"><a name="p185309331345"></a><a name="p185309331345"></a><strong id="b18520248203717"><a name="b18520248203717"></a><a name="b18520248203717"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p145309332344"><a name="p145309332344"></a><a name="p145309332344"></a><strong id="b5367174913370"><a name="b5367174913370"></a><a name="b5367174913370"></a>Description</strong></p>
</td>
</tr>
<tr id="row14530203310348"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p1653014339343"><a name="p1653014339343"></a><a name="p1653014339343"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p1453023323419"><a name="p1453023323419"></a><a name="p1453023323419"></a>Succeeded in setting the UART device attributes.</p>
</td>
</tr>
<tr id="row6531163373412"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p16530123310345"><a name="p16530123310345"></a><a name="p16530123310345"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p1953118334347"><a name="p1953118334347"></a><a name="p1953118334347"></a>Failed to set the UART device attributes.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to set the UART device attributes:
### Setting UART Device Attributes
Call **UartSetAttribute()** to set UART device attributes.
```
int32_t UartSetAttribute(DevHandle handle, struct UartAttribute *attribute);
```
**Table 5** Description of UartSetAttribute
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| attribute | Pointer to the UART device attributes to set.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Set UART device attributes.
``` ```
int32_t ret; int32_t ret;
struct UartAttribute attribute; struct UartAttribute attribute;
attribute.dataBits = UART_ATTR_DATABIT_7; /* Set the number of data bits to 7. */ attribute.dataBits = UART_ATTR_DATABIT_7; /* Enable 7 bits to be transferred each time. */
attribute.parity = UART_ATTR_PARITY_NONE; /* Set the parity bit to no parity. */ attribute.parity = UART_ATTR_PARITY_NONE; /* Disable parity check. */
attribute.stopBits = UART_ATTR_STOPBIT_1; /* Set the stop bit to 1. */ attribute.stopBits = UART_ATTR_STOPBIT_1; /* Set the stop bit to 1. */
attribute.rts = UART_ATTR_RTS_DIS; /* Disable the RTS signal. */ attribute.rts = UART_ATTR_RTS_DIS; /* Disable the RTS signal. */
attribute.cts = UART_ATTR_CTS_DIS; /* Disable the CTS signal. */ attribute.cts = UART_ATTR_CTS_DIS; /* Disable the CTS signal. */
attribute.fifoRxEn = UART_ATTR_RX_FIFO_EN; /* Enable RX FIFO. */ attribute.fifoRxEn = UART_ATTR_RX_FIFO_EN; /* Enable RX FIFO. */
attribute.fifoTxEn = UART_ATTR_TX_FIFO_EN; /* Enable TX FIFO. */ attribute.fifoTxEn = UART_ATTR_TX_FIFO_EN; /* Enable TX FIFO. */
/* Set the UART device attributes. */ /* Set UART device attributes. */
ret = UartSetAttribute(handle, &attribute); ret = UartSetAttribute(handle, &attribute);
if (ret != 0) { if (ret != 0) {
HDF_LOGE("UartSetAttribute: failed, ret %d\n", ret); HDF_LOGE("UartSetAttribute: failed, ret %d\n", ret);
} }
``` ```
### Obtaining UART Device Attributes<a name="section18689637165812"></a>
After setting the UART device attributes, obtain the current device attributes by calling the following function:
int32\_t UartGetAttribute\(DevHandle handle, struct UartAttribute \*attribute\);
**Table 6** Description of UartGetAttribute
<a name="table17532123316342"></a>
<table><thead align="left"><tr id="row18531193383420"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p85311833143420"><a name="p85311833143420"></a><a name="p85311833143420"></a><strong id="b1770784123715"><a name="b1770784123715"></a><a name="b1770784123715"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p17531103319348"><a name="p17531103319348"></a><a name="p17531103319348"></a><strong id="b0130114519373"><a name="b0130114519373"></a><a name="b0130114519373"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row35311533153413"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p453133333418"><a name="p453133333418"></a><a name="p453133333418"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p753193323420"><a name="p753193323420"></a><a name="p753193323420"></a>UART device handle.</p>
</td>
</tr>
<tr id="row1953103315344"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p35315333346"><a name="p35315333346"></a><a name="p35315333346"></a>attribute</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p14531633133416"><a name="p14531633133416"></a><a name="p14531633133416"></a>Pointer to the UART device attributes.</p>
</td>
</tr>
<tr id="row45321433143415"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p653273363417"><a name="p653273363417"></a><a name="p653273363417"></a><strong id="b15211548193719"><a name="b15211548193719"></a><a name="b15211548193719"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1653203312347"><a name="p1653203312347"></a><a name="p1653203312347"></a><strong id="b836815498379"><a name="b836815498379"></a><a name="b836815498379"></a>Description</strong></p>
</td>
</tr>
<tr id="row175320339342"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p10532163383412"><a name="p10532163383412"></a><a name="p10532163383412"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p5532143319341"><a name="p5532143319341"></a><a name="p5532143319341"></a>Succeeded in obtaining the UART device attributes.</p>
</td>
</tr>
<tr id="row125327337340"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p19532153317345"><a name="p19532153317345"></a><a name="p19532153317345"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p175321933163410"><a name="p175321933163410"></a><a name="p175321933163410"></a>Failed to obtain the UART device attributes.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to obtain the UART device attributes:
### Obtaining UART Device Attributes
Call **UartGetAttribute()** to obtain the current UART device attributes.
```
int32_t UartGetAttribute(DevHandle handle, struct UartAttribute *attribute);
```
**Table 6** Description of UartGetAttribute
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| attribute | Pointer to the UART device attributes obtained.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Obtain UART device attributes.
``` ```
int32_t ret; int32_t ret;
struct UartAttribute attribute; struct UartAttribute attribute;
/* Obtain the UART attributes. */ /* Obtain UART device attributes. */
ret = UartGetAttribute(handle, &attribute); ret = UartGetAttribute(handle, &attribute);
if (ret != 0) { if (ret != 0) {
HDF_LOGE("UartGetAttribute: failed, ret %d\n", ret); HDF_LOGE("UartGetAttribute: failed, ret %d\n", ret);
} }
``` ```
### Setting the UART Transmission Mode<a name="section72713435918"></a>
Before performing UART communication, set the UART transmission mode by calling the following function:
int32\_t UartSetTransMode\(DevHandle handle, enum UartTransMode mode\);
**Table 7** Description of UartSetTransMode
<a name="table131892266313"></a>
<table><thead align="left"><tr id="row018922615318"><th class="cellrowborder" valign="top" width="49.980000000000004%" id="mcps1.2.3.1.1"><p id="p131891826835"><a name="p131891826835"></a><a name="p131891826835"></a><strong id="b197086411379"><a name="b197086411379"></a><a name="b197086411379"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50.019999999999996%" id="mcps1.2.3.1.2"><p id="p101894269314"><a name="p101894269314"></a><a name="p101894269314"></a><strong id="b813014510375"><a name="b813014510375"></a><a name="b813014510375"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row11893261734"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p81897261333"><a name="p81897261333"></a><a name="p81897261333"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p5190142618310"><a name="p5190142618310"></a><a name="p5190142618310"></a>UART device handle.</p>
</td>
</tr>
<tr id="row1119082615317"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p1519012261314"><a name="p1519012261314"></a><a name="p1519012261314"></a>mode</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p121901026632"><a name="p121901026632"></a><a name="p121901026632"></a>UART transmission mode to set.</p>
</td>
</tr>
<tr id="row19190152612317"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p131900266316"><a name="p131900266316"></a><a name="p131900266316"></a><strong id="b1352194823717"><a name="b1352194823717"></a><a name="b1352194823717"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p1519022616315"><a name="p1519022616315"></a><a name="p1519022616315"></a><strong id="b1836924917371"><a name="b1836924917371"></a><a name="b1836924917371"></a>Description</strong></p>
</td>
</tr>
<tr id="row919016261932"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p10190526334"><a name="p10190526334"></a><a name="p10190526334"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p1219012264318"><a name="p1219012264318"></a><a name="p1219012264318"></a>Succeeded in setting the UART transmission mode.</p>
</td>
</tr>
<tr id="row1219017262313"><td class="cellrowborder" valign="top" width="49.980000000000004%" headers="mcps1.2.3.1.1 "><p id="p15190162616316"><a name="p15190162616316"></a><a name="p15190162616316"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50.019999999999996%" headers="mcps1.2.3.1.2 "><p id="p131906262311"><a name="p131906262311"></a><a name="p131906262311"></a>Failed to set the UART transmission mode.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to set the transmission mode to **UART\_MODE\_RD\_BLOCK**:
### Setting the UART Transmission Mode
Call **UartSetTransMode()** to set the UART transmission mode.
```
int32_t UartSetTransMode(DevHandle handle, enum UartTransMode mode);
```
**Table 7** Description of UartSetTransMode
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| mode | UART transmission mode to set.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Set the UART transmission mode to **UART_MODE_RD_BLOCK**.
``` ```
int32_t ret; int32_t ret;
/* Set the UART transmission mode. */ /* Set the UART transmission mode. */
...@@ -438,116 +258,64 @@ if (ret != 0) { ...@@ -438,116 +258,64 @@ if (ret != 0) {
} }
``` ```
### Writing Data of a Specified Length into a UART Device<a name="section128001736155919"></a>
To write data into a UART device, call the following function:
int32\_t UartWrite\(DevHandle handle, uint8\_t \*data, uint32\_t size\);
**Table 8** Description of UartWrite
<a name="table27825111368"></a>
<table><thead align="left"><tr id="row1578171123619"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p078112115360"><a name="p078112115360"></a><a name="p078112115360"></a><strong id="b14708841203711"><a name="b14708841203711"></a><a name="b14708841203711"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p37811711163612"><a name="p37811711163612"></a><a name="p37811711163612"></a><strong id="b2131174553712"><a name="b2131174553712"></a><a name="b2131174553712"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row1878291143611"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p07818112360"><a name="p07818112360"></a><a name="p07818112360"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p178281113369"><a name="p178281113369"></a><a name="p178281113369"></a>UART device handle.</p>
</td>
</tr>
<tr id="row7782811123614"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p8782911173610"><a name="p8782911173610"></a><a name="p8782911173610"></a>data</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p17782171120366"><a name="p17782171120366"></a><a name="p17782171120366"></a>Pointer to the data to write.</p>
</td>
</tr>
<tr id="row1578251112367"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p3782911183612"><a name="p3782911183612"></a><a name="p3782911183612"></a>size</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p17782161110366"><a name="p17782161110366"></a><a name="p17782161110366"></a>Length of the data to write.</p>
</td>
</tr>
<tr id="row1378281113363"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p87821411183616"><a name="p87821411183616"></a><a name="p87821411183616"></a><strong id="b2052274863718"><a name="b2052274863718"></a><a name="b2052274863718"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p13782111116361"><a name="p13782111116361"></a><a name="p13782111116361"></a><strong id="b73704492377"><a name="b73704492377"></a><a name="b73704492377"></a>Description</strong></p>
</td>
</tr>
<tr id="row47822112365"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p107821011103613"><a name="p107821011103613"></a><a name="p107821011103613"></a>0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p11782191103610"><a name="p11782191103610"></a><a name="p11782191103610"></a>Succeeded in writing data into the UART device.</p>
</td>
</tr>
<tr id="row11782911113611"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p1578221111367"><a name="p1578221111367"></a><a name="p1578221111367"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p9782151110366"><a name="p9782151110366"></a><a name="p9782151110366"></a>Failed to write data into the UART device.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to write data of a specified length into the UART device:
### Writing Data to a UART Device
Call **UartWrite()** to write data of the specified length to a UART device.
```
int32_t UartWrite(DevHandle handle, uint8_t *data, uint32_t size);
```
**Table 8** Description of UartWrite
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| data | Pointer to the data to write.|
| size | Length of the data to write.|
| **Return Value**| **Description**|
| 0 | The operation is successful.|
| Negative value| The operation failed.|
Example: Write data to a UART device.
``` ```
int32_t ret; int32_t ret;
uint8_t wbuff[5] = {1, 2, 3, 4, 5}; uint8_t wbuff[5] = {1, 2, 3, 4, 5};
/* Write 5-byte data into the UART device. */ /* Write 5-byte data to the UART device. */
ret = UartWrite(handle, wbuff, 5); ret = UartWrite(handle, wbuff, 5);
if (ret != 0) { if (ret != 0) {
HDF_LOGE("UartWrite: failed, ret %d\n", ret); HDF_LOGE("UartWrite: failed, ret %d\n", ret);
} }
``` ```
### Reading Data of a Specified Length from a UART Device<a name="section92851601604"></a>
To write data into a UART device, call the following function:
int32\_t UartRead\(DevHandle handle, uint8\_t \*data, uint32\_t size\);
**Table 9** Description of UartRead
<a name="table162341717123713"></a>
<table><thead align="left"><tr id="row023313171377"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p1123331710376"><a name="p1123331710376"></a><a name="p1123331710376"></a><strong id="b970911411374"><a name="b970911411374"></a><a name="b970911411374"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p523321783715"><a name="p523321783715"></a><a name="p523321783715"></a><strong id="b16132114553713"><a name="b16132114553713"></a><a name="b16132114553713"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row6234417133712"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p7233121716379"><a name="p7233121716379"></a><a name="p7233121716379"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p17234101753712"><a name="p17234101753712"></a><a name="p17234101753712"></a>UART device handle.</p>
</td>
</tr>
<tr id="row18234151718372"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p16234191783711"><a name="p16234191783711"></a><a name="p16234191783711"></a>data</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p923417175378"><a name="p923417175378"></a><a name="p923417175378"></a>Pointer to the buffer for receiving the data.</p>
</td>
</tr>
<tr id="row82341017193711"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p13234917103717"><a name="p13234917103717"></a><a name="p13234917103717"></a>size</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p182341817153717"><a name="p182341817153717"></a><a name="p182341817153717"></a>Length of the data to read.</p>
</td>
</tr>
<tr id="row102341617123717"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p172341617163712"><a name="p172341617163712"></a><a name="p172341617163712"></a><strong id="b1352319486376"><a name="b1352319486376"></a><a name="b1352319486376"></a>Return Value</strong></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p1623431763718"><a name="p1623431763718"></a><a name="p1623431763718"></a><strong id="b73711949113718"><a name="b73711949113718"></a><a name="b73711949113718"></a>Description</strong></p>
</td>
</tr>
<tr id="row4234151719372"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p3234131716375"><a name="p3234131716375"></a><a name="p3234131716375"></a>Non-negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p7234171783718"><a name="p7234171783718"></a><a name="p7234171783718"></a>Length of the data read from the UART device.</p>
</td>
</tr>
<tr id="row112340173378"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p1423431743714"><a name="p1423431743714"></a><a name="p1423431743714"></a>Negative value</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p32349178378"><a name="p32349178378"></a><a name="p32349178378"></a>Failed to read data from the UART device.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to read data of a specified length from the UART device:
### Reading Data from a UART Device
Call **UartRead()** to read data of the specified length from a UART device.
```
int32_t UartRead(DevHandle handle, uint8_t *data, uint32_t size);
```
**Table 9** Description of UartRead
| Parameter| Description|
| -------- | -------- |
| handle | UART device handle.|
| data | Pointer to the buffer for receiving the data.|
| size | Length of the data to read.|
| **Return Value**| **Description**|
| Non-negative value| The operation is successful. The length of the data read is returned.|
| Negative value| The operation failed.|
Example: Read data of the specified length from a UART device.
``` ```
int32_t ret; int32_t ret;
uint8_t rbuff[5] = {0}; uint8_t rbuff[5] = {0};
...@@ -558,44 +326,39 @@ if (ret < 0) { ...@@ -558,44 +326,39 @@ if (ret < 0) {
} }
``` ```
>![](../public_sys-resources/icon-caution.gif) **CAUTION:** > ![icon-caution.gif](../public_sys-resources/icon-caution.gif) **CAUTION**<br/>
>Data is successfully read from the UART device if a non-negative value is returned. If the return value is **0**, no valid data can be read from the UART device. If the return value is greater than **0**, the return value is the length of the data actually read from the UART device. The length is less than or equal to the value of **size** and does not exceed the maximum length of data to read at a time specified by the UART controller in use. > Data is successfully read from the UART device if a non-negative value is returned. If **0** is returned, no valid data can be read from the UART device. A value greater than **0** indicates the length of the data read from the UART device. The data length must be less than or equal to the value of **size** and cannot exceed the maximum length of the data to read at a time specified by the UART controller in use.
### Destroying the UART Device Handle<a name="section1477410521406"></a>
After the UART communication, destroy the UART device handle by calling the following function: ### Closing a UART Device Handle
void UartClose\(DevHandle handle\); Call **UartClose()** to close a UART device handle.
This function will release the resources previously obtained.
```
void UartClose(DevHandle handle);
```
**Table 10** Description of UartClose This function releases the resources requested by **UartOpen**.
<a name="table03348317351"></a> **Table 10** Description of UartClose
<table><thead align="left"><tr id="row15334837351"><th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.1"><p id="p933411316354"><a name="p933411316354"></a><a name="p933411316354"></a><strong id="b1710184115375"><a name="b1710184115375"></a><a name="b1710184115375"></a>Parameter</strong></p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.2.3.1.2"><p id="p16334103143517"><a name="p16334103143517"></a><a name="p16334103143517"></a><strong id="b2013254513370"><a name="b2013254513370"></a><a name="b2013254513370"></a>Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="row733483103513"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.1 "><p id="p7334530358"><a name="p7334530358"></a><a name="p7334530358"></a>handle</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.2.3.1.2 "><p id="p133341331356"><a name="p133341331356"></a><a name="p133341331356"></a>UART device handle.</p>
</td>
</tr>
</tbody>
</table>
The following example shows how to destroy the UART device handle: | Parameter| Description|
| -------- | -------- |
| handle | UART device handle to close.|
Example: Close a UART device handle.
``` ```
UartClose(handle); /* Destroy the UART device handle. */ UartClose(handle); /* Close the UART device handle. */
``` ```
## Usage Example<a name="section35404241311"></a>
The following is a usage example of a UART device, including how to obtain the UART device handle, set the baud rate, device attributes, and transmission mode, read data from or write data into the UART device, and then destroy the UART device handle. ## Example
The following example shows how to open a UART device handle, set the baud rate, device attributes, and transmission mode, read data from or write data into the UART device, and then close the UART device handle.
``` ```
#include "hdf_log.h" #include "hdf_log.h"
#include "uart_if.h" #include "uart_if.h"
...@@ -608,16 +371,16 @@ void UartTestSample(void) ...@@ -608,16 +371,16 @@ void UartTestSample(void)
uint8_t wbuff[5] = { 1, 2, 3, 4, 5 }; uint8_t wbuff[5] = { 1, 2, 3, 4, 5 };
uint8_t rbuff[5] = { 0 }; uint8_t rbuff[5] = { 0 };
struct UartAttribute attribute; struct UartAttribute attribute;
attribute.dataBits = UART_ATTR_DATABIT_7; /* Set the number of data bits to 7. */ attribute.dataBits = UART_ATTR_DATABIT_7; /* Enable 7 bits to be transferred each time. */
attribute.parity = UART_ATTR_PARITY_NONE; /* Set the parity bit to no parity. */ attribute.parity = UART_ATTR_PARITY_NONE; /* Disable parity check. */
attribute.stopBits = UART_ATTR_STOPBIT_1; /* Set the stop bit to 1. */ attribute.stopBits = UART_ATTR_STOPBIT_1; /* Set the stop bit to 1. */
attribute.rts = UART_ATTR_RTS_DIS; /* Disable the RTS signal. */ attribute.rts = UART_ATTR_RTS_DIS; /* Disable the RTS signal. */
attribute.cts = UART_ATTR_CTS_DIS; /* Disable the CTS signal. */ attribute.cts = UART_ATTR_CTS_DIS; /* Disable the CTS signal. */
attribute.fifoRxEn = UART_ATTR_RX_FIFO_EN; /* Enable RX FIFO. */ attribute.fifoRxEn = UART_ATTR_RX_FIFO_EN; /* Enable RX FIFO. */
attribute.fifoTxEn = UART_ATTR_TX_FIFO_EN; /* Enable TX FIFO. */ attribute.fifoTxEn = UART_ATTR_TX_FIFO_EN; /* Enable TX FIFO. */
/* Set the UART port number actually used. */ /* Enter the UART port number. */
port = 1; port = 1;
/* Obtain the UART device handle. */ /* Open the UART device handle based on the port number. */
handle = UartOpen(port); handle = UartOpen(port);
if (handle == NULL) { if (handle == NULL) {
HDF_LOGE("UartOpen: failed!\n"); HDF_LOGE("UartOpen: failed!\n");
...@@ -629,7 +392,7 @@ void UartTestSample(void) ...@@ -629,7 +392,7 @@ void UartTestSample(void)
HDF_LOGE("UartSetBaud: failed, ret %d\n", ret); HDF_LOGE("UartSetBaud: failed, ret %d\n", ret);
goto _ERR; goto _ERR;
} }
/* Set the UART device attributes. */ /* Set UART device attributes. */
ret = UartSetAttribute(handle, &attribute); ret = UartSetAttribute(handle, &attribute);
if (ret != 0) { if (ret != 0) {
HDF_LOGE("UartSetAttribute: failed, ret %d\n", ret); HDF_LOGE("UartSetAttribute: failed, ret %d\n", ret);
...@@ -641,7 +404,7 @@ void UartTestSample(void) ...@@ -641,7 +404,7 @@ void UartTestSample(void)
HDF_LOGE("UartSetTransMode: failed, ret %d\n", ret); HDF_LOGE("UartSetTransMode: failed, ret %d\n", ret);
goto _ERR; goto _ERR;
} }
/* Write 5-byte data into the UART device. */ /* Write 5-byte data to the UART device. */
ret = UartWrite(handle, wbuff, 5); ret = UartWrite(handle, wbuff, 5);
if (ret != 0) { if (ret != 0) {
HDF_LOGE("UartWrite: failed, ret %d\n", ret); HDF_LOGE("UartWrite: failed, ret %d\n", ret);
...@@ -654,7 +417,7 @@ void UartTestSample(void) ...@@ -654,7 +417,7 @@ void UartTestSample(void)
goto _ERR; goto _ERR;
} }
_ERR: _ERR:
/* Destroy the UART device handle. */ /* Close the UART device handle. */
UartClose(handle); UartClose(handle);
} }
``` ```
\ No newline at end of file
en/device-dev/driver/driver-platform-uart-develop.md
浏览文件 @ 3bc24b2e
...@@ -14,7 +14,7 @@ In the Hardware Driver Foundation (HDF), the Universal Asynchronous Receiver/Tra ...@@ -14,7 +14,7 @@ In the Hardware Driver Foundation (HDF), the Universal Asynchronous Receiver/Tra
**UartHostMethod**: **UartHostMethod**:
``` ```
struct UartHostMethod { struct UartHostMethod {
int32_t (*Init)(struct UartHost *host); int32_t (*Init)(struct UartHost *host);
...@@ -32,18 +32,18 @@ struct UartHostMethod { ...@@ -32,18 +32,18 @@ struct UartHostMethod {
**Table 1** Description of the callback functions in UartHostMethod **Table 1** Description of the callback functions in UartHostMethod
| Function| Input Parameter| Output Parameter| Return Value| Description| | Function| Input Parameter| Output Parameter| Return Value| Description|
| -------- | -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- | -------- |
| Init | **host**: structure pointer to the UART controller at the core layer.| –| HDF_STATUS| Initializes a UART device.| | Init | **host**: structure pointer to the UART controller at the core layer.| –| HDF_STATUS| Initializes a UART device.|
| Deinit | **host**: structure pointer to the UART controller at the core layer.| –| HDF_STATUS| Deinitializes a UART device.| | Deinit | **host**: structure pointer to the UART controller at the core layer.| –| HDF_STATUS| Deinitializes a UART device.|
| Read | **host**: structure pointer to the UART controller at the core layer.<br>**size**: data size, which is of the uint32_t type.| **data**: pointer to the output data. The value is of the uint8_t type.| HDF_STATUS| Reads data.| | Read | **host**: structure pointer to the UART controller at the core layer.<br>**size**: data size, which is of the uint32_t type.| **data**: pointer to the data read. The value is of the uint8_t type. | HDF_STATUS| Reads data.|
| Write | **host**: structure pointer to the UART controller at the core layer.<br>**data**: pointer to the input data. The value is of the uint8_t type.<br>**size**: data size, which is of the uint32_t type.| –| HDF_STATUS| Writes data.| | Write | **host**: structure pointer to the UART controller at the core layer.<br>**data**: pointer to the data to write. The value is of the uint8_t type.<br>**size**: data size, which is of the uint32_t type. | –| HDF_STATUS| Writes data.|
| SetBaud | **host**: structure pointer to the UART controller at the core layer.<br>**baudRate**: pointer to the input baud rate. The value is of the uint32_t type. | –| HDF_STATUS| Sets the baud rate.| | SetBaud | **host**: structure pointer to the UART controller at the core layer.<br>**baudRate**: pointer to the baud rate to set. The value is of the uint32_t type. | –| HDF_STATUS| Sets the baud rate.|
| GetBaud | **host**: structure pointer to the UART controller at the core layer.| **baudRate**: pointer to the output baud rate. The value is of the uint32_t type.| HDF_STATUS| Obtains the current baud rate.| | GetBaud | **host**: structure pointer to the UART controller at the core layer.| **baudRate**: pointer to the baud rate obtained. The value is of the uint32_t type. | HDF_STATUS| Obtains the current baud rate.|
| GetAttribute | **host**: structure pointer to the UART controller at the core layer.| **attribute**: structure pointer to the UART attributes. For details, see **UartAttribute** in **uart_if.h**.| HDF_STATUS| Obtains UART attributes.| | GetAttribute | **host**: structure pointer to the UART controller at the core layer.| **attribute**: structure pointer to the attribute obtained. For details, see **UartAttribute** in **uart_if.h**. | HDF_STATUS| Obtains UART attributes.|
| SetAttribute | **host**: structure pointer to the UART controller at the core layer.<br>**attribute**: structure pointer to the UART attributes to set.| –| HDF_STATUS| Sets UART attributes.| | SetAttribute | **host**: structure pointer to the UART controller at the core layer.<br>**attribute**: structure pointer to the attribute to set. | –| HDF_STATUS| Sets UART attributes.|
| SetTransMode | **host**: structure pointer to the UART controller at the core layer.<br>**mode**: transfer mode to set. For details, see **UartTransMode** in **uart_if.h**.| –| HDF_STATUS| Sets the UART transfer mode.| | SetTransMode | **host**: structure pointer to the UART controller at the core layer.<br>**mode**: transfer mode to set. For details, see **UartTransMode** in **uart_if.h**.| –| HDF_STATUS| Sets the UART transfer mode.|
| PollEvent | **host**: structure pointer to the UART controller at the core layer.<br>**filep**: void pointer to a file.<br>**table**: void pointer to poll_table.| –| HDF_STATUS| Polls for pending events.| | PollEvent | **host**: structure pointer to the UART controller at the core layer.<br>**filep**: void pointer to a file.<br>**table**: void pointer to poll_table.| –| HDF_STATUS| Polls for pending events.|
## How to Develop ## How to Develop
...@@ -61,10 +61,11 @@ The UART module adaptation involves the following steps: ...@@ -61,10 +61,11 @@ The UART module adaptation involves the following steps:
3. Instantiate the UART controller object. 3. Instantiate the UART controller object.
- Initialize **UartHost**. - Initialize **UartHost**.
- Instantiate **UartHostMethod** in the **UartHost** object. - Instantiate **UartHostMethod** in the **UartHost** object.
> ![icon-note.gif](../public_sys-resources/icon-note.gif) **NOTE**<br> > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br>
> For details about the functions in **UartHostMethod**, see [Available APIs](#available-apis). > For details about the functions in **UartHostMethod**, see [Available APIs](#available-apis).
4. Debug the driver.<br> 4. Debug the driver.
(Optional) For new drivers, verify the basic functions, such as the UART status control and response to interrupts. (Optional) For new drivers, verify the basic functions, such as the UART status control and response to interrupts.
...@@ -72,11 +73,16 @@ The UART module adaptation involves the following steps: ...@@ -72,11 +73,16 @@ The UART module adaptation involves the following steps:
The following uses **uart_hi35xx.c** as an example to present the information required for implementing device functions. The following uses **uart_hi35xx.c** as an example to present the information required for implementing device functions.
1. Instantiate the driver entry.<br/>The driver entry must be a global variable of the **HdfDriverEntry** type (defined in **hdf_device_desc.h**), and the value of **moduleName** must be the same as that in **device_info.hcs**. In the HDF, the start address of each **HdfDriverEntry** object of all loaded drivers is collected to form a segment address space similar to an array for the upper layer to invoke. 1. Instantiate the driver entry.
The driver entry must be a global variable of the **HdfDriverEntry** type (defined in **hdf_device_desc.h**), and the value of **moduleName** must be the same as that in **device_info.hcs**.
In the HDF, the start address of each **HdfDriverEntry** object of all loaded drivers is collected to form a segment address space similar to an array for the upper layer to invoke.
Generally, the HDF calls the **Bind** function and then the **Init** function to load a driver. If **Init** fails to be called, the HDF calls **Release** to release driver resources and exit. Generally, the HDF calls the **Bind** function and then the **Init** function to load a driver. If **Init** fails to be called, the HDF calls **Release** to release driver resources and exit.
UART driver entry example: UART driver entry example:
``` ```
struct HdfDriverEntry g_hdfUartDevice = { struct HdfDriverEntry g_hdfUartDevice = {
.moduleVersion = 1, .moduleVersion = 1,
...@@ -89,11 +95,15 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -89,11 +95,15 @@ The following uses **uart_hi35xx.c** as an example to present the information re
HDF_INIT(g_hdfUartDevice); HDF_INIT(g_hdfUartDevice);
``` ```
2. Add the **deviceNode** information to the **device_info.hcs** file and configure the device attributes in the **uart_config.hcs** file.<br> The **deviceNode** information is related to registration of the driver entry. The device attribute values are closely related to the default values or value ranges of the **UartHost** members at the core layer. 2. Add the **deviceNode** information to the **device_info.hcs** file and configure the device attributes in the **uart_config.hcs** file.
In this example, there is only one UART controller. If there are multiple UART controllers, you need to add the **deviceNode** information to the **device_info** file and add the corresponding device attributes to the **uart_config** file for each controller.
- **device_info.hcs** configuration example The **deviceNode** information is related to registration of the driver entry. The device attribute values are closely related to the default values or value ranges of the **UartHost** members at the core layer.
In this example, there is only one UART controller. If there are multiple UART controllers, you need to add the **deviceNode** information to the **device_info** file and add the corresponding device attributes to the **uart_config** file for each controller.
- **device_info.hcs** configuration example:
``` ```
root { root {
device_info { device_info {
...@@ -103,11 +113,11 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -103,11 +113,11 @@ The following uses **uart_hi35xx.c** as an example to present the information re
priority = 50; priority = 50;
device_uart :: device { device_uart :: device {
device0 :: deviceNode { device0 :: deviceNode {
policy = 1; // The driver publishes services only for kernel-mode processes. policy = 1; // The driver publishes services only for kernel-mode processes.
priority = 40; // Driver startup priority. priority = 40; // Driver startup priority.
permission = 0644; // Permission for the driver to create a device node. permission = 0644; // Permission for the driver to create a device node.
moduleName = "HDF_PLATFORM_UART"; // Driver name, which must be the same as moduleName in the HdfDriverEntry structure. moduleName = "HDF_PLATFORM_UART"; // Driver name, which must be the same as moduleName in the HdfDriverEntry structure.
serviceName = "HDF_PLATFORM_UART_0";// Unique name of the service published by the driver. The name is in the HDF_PLATFORM_UART_X format. X indicates the UART controller number. serviceName = "HDF_PLATFORM_UART_0"; // Unique name of the service published by the driver. The name is in the HDF_PLATFORM_UART_X format. X indicates the UART controller number.
deviceMatchAttr = "hisilicon_hi35xx_uart_0"; // Keyword for matching the private data of the driver. The value must be the same as that of match_attr in the private data configuration table of the driver. deviceMatchAttr = "hisilicon_hi35xx_uart_0"; // Keyword for matching the private data of the driver. The value must be the same as that of match_attr in the private data configuration table of the driver.
} }
device1 :: deviceNode { device1 :: deviceNode {
...@@ -127,20 +137,20 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -127,20 +137,20 @@ The following uses **uart_hi35xx.c** as an example to present the information re
- **uart_config.hcs** configuration example - **uart_config.hcs** configuration example
``` ```
root { root {
platform { platform {
template uart_controller { // Template configuration. In the template, you can configure the common parameters shared by device nodes. template uart_controller { // Template configuration. In the template, you can configure the common parameters shared by device nodes.
match_attr = ""; match_attr = "";
num = 0; // (Mandatory) Device number num = 0; // (Mandatory) Device number.
baudrate = 115200; // (Mandatory) Baud rate. Set the value based on service requirements. baudrate = 115200; // (Mandatory) Baud rate. Set the value based on service requirements.
fifoRxEn = 1; // (Mandatory) Enable FIFOs to be received. fifoRxEn = 1; // (Mandatory) Enable FIFOs to be received.
fifoTxEn = 1; // (Mandatory) Enable FIFOs to be transferred. fifoTxEn = 1; // (Mandatory) Enable FIFOs to be transferred.
flags = 4; // (Mandatory) Flag signal. flags = 4; // (Mandatory) Flag signal.
regPbase = 0x120a0000; // (Mandatory) Used for address mapping. regPbase = 0x120a0000; // (Mandatory) Used for address mapping.
interrupt = 38; // (Mandatory) Interrupt number. interrupt = 38; // (Mandatory) Interrupt number.
iomemCount = 0x48; // (Mandatory) Used for address mapping. iomemCount = 0x48; // (Mandatory) Used for address mapping.
} }
controller_0x120a0000 :: uart_controller { controller_0x120a0000 :: uart_controller {
match_attr = "hisilicon_hi35xx_uart_0";// (Mandatory) The value must be the same as that of deviceMatchAttr of the corresponding device in device_info.hcs. match_attr = "hisilicon_hi35xx_uart_0";// (Mandatory) The value must be the same as that of deviceMatchAttr of the corresponding device in device_info.hcs.
...@@ -159,43 +169,44 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -159,43 +169,44 @@ The following uses **uart_hi35xx.c** as an example to present the information re
``` ```
3. Initialize the **UartHost** object at the core layer, including defining a custom structure (to pass parameters and data) and implementing the **HdfDriverEntry** member functions (**Bind**, **Init**, and **Release**) to instantiate **UartHostMethod** in **UartHost** (so that the underlying driver functions can be called). 3. Initialize the **UartHost** object at the core layer, including defining a custom structure (to pass parameters and data) and implementing the **HdfDriverEntry** member functions (**Bind**, **Init**, and **Release**) to instantiate **UartHostMethod** in **UartHost** (so that the underlying driver functions can be called).
- Defining a custom structure - Defining a custom structure
To the driver, the custom structure holds parameters and data. The **DeviceResourceIface** method provided by the HDF reads the values in the **uart_config.hcs** file to initialize the members in the custom structure and passes important parameters, such as the device number, to the **UartHost** object at the core layer. To the driver, the custom structure holds parameters and data. The **DeviceResourceIface** method provided by the HDF reads the values in the **uart_config.hcs** file to initialize the members in the custom structure and passes important parameters, such as the device number, to the **UartHost** object at the core layer.
``` ```
struct UartPl011Port { // Interface structure struct UartPl011Port { // Interface structure
int32_t enable; int32_t enable;
unsigned long physBase; // Physical address unsigned long physBase; // Physical address
uint32_t irqNum; // Interrupt number uint32_t irqNum; // Interrupt number
uint32_t defaultBaudrate;// Default baud rate uint32_t defaultBaudrate; // Default baud rate
uint32_t flags; // Flags related to the following three macros. uint32_t flags; // Flags related to the following three macros
#define PL011_FLG_IRQ_REQUESTED (1 << 0) #define PL011_FLG_IRQ_REQUESTED (1 << 0)
#define PL011_FLG_DMA_RX_REQUESTED (1 << 1) #define PL011_FLG_DMA_RX_REQUESTED (1 << 1)
#define PL011_FLG_DMA_TX_REQUESTED (1 << 2) #define PL011_FLG_DMA_TX_REQUESTED (1 << 2)
struct UartDmaTransfer *rxUdt; // DMA transfer struct UartDmaTransfer *rxUdt; // DMA transfer
struct UartDriverData *udd; // The data structure is defined as follows: struct UartDriverData *udd; // The data structure is defined as follows:
}; };
struct UartDriverData { // Structure related to data transfer struct UartDriverData { // Structure related to data transfer
uint32_t num; uint32_t num;
uint32_t baudrate; // Baud rate (configurable) uint32_t baudrate; // Baud rate (configurable)
struct UartAttribute attr; // Attributes, such as the data bit and stop bit, related to data transfer struct UartAttribute attr; // Attributes, such as the data bit and stop bit, related to data transfer.
struct UartTransfer *rxTransfer; // Buffer (FIFO structure) struct UartTransfer *rxTransfer; // Buffer (FIFO structure)
wait_queue_head_t wait; // Queuing signal related to conditional variables wait_queue_head_t wait; // Queuing signal related to conditional variables
int32_t count; // Data count int32_t count; // Data count
int32_t state; // UART controller state int32_t state; // UART controller state
#define UART_STATE_NOT_OPENED 0 #define UART_STATE_NOT_OPENED 0
#define UART_STATE_OPENING 1 #define UART_STATE_OPENING 1
#define UART_STATE_USEABLE 2 #define UART_STATE_USEABLE 2
#define UART_STATE_SUSPENDED 3 #define UART_STATE_SUSPENDED 3
uint32_t flags; // Status flags uint32_t flags; // Status flags
#define UART_FLG_DMA_RX (1 << 0) #define UART_FLG_DMA_RX (1 << 0)
#define UART_FLG_DMA_TX (1 << 1) #define UART_FLG_DMA_TX (1 << 1)
#define UART_FLG_RD_BLOCK (1 << 2) #define UART_FLG_RD_BLOCK (1 << 2)
RecvNotify recv; // Pointer to the function that receives serial port data RecvNotify recv; // Pointer to the function that receives serial port data.
struct UartOps *ops; // Custom function pointer structure. For details, see device/hisilicon/drivers/uart/uart_pl011.c. struct UartOps *ops; // Custom function pointer structure. For details, see device/hisilicon/drivers/uart/uart_pl011.c.
void *private; // It stores the pointer to the start address of UartPl011Port for easy invocation. void *private; // It stores the pointer to the start address of UartPl011Port for easy invocation.
}; };
// UartHost is the controller structure at the core layer. The Init function assigns values to the members of UartHost. // UartHost is the controller structure at the core layer. The Init function assigns values to the members of UartHost.
...@@ -205,12 +216,13 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -205,12 +216,13 @@ The following uses **uart_hi35xx.c** as an example to present the information re
uint32_t num; uint32_t num;
OsalAtomic atom; OsalAtomic atom;
void *priv; // It stores the pointer to the start address of the vendor's custom structure for easy invocation. void *priv; // It stores the pointer to the start address of the vendor's custom structure for easy invocation.
struct UartHostMethod *method; // Hook at the core layer. You need to implement and instantiate its member functions. struct UartHostMethod *method; // Hook at the core layer. You need to implement and instantiate its member functions.
}; };
``` ```
- Instantiating **UartHostMethod** in **UartHost** (other members are initialized by **Bind**) - Instantiating **UartHostMethod** in **UartHost** (other members are initialized by **Bind**)
``` ```
// Example in uart_hi35xx.c: instantiate the hook. // Example in uart_hi35xx.c: instantiate the hook.
struct UartHostMethod g_uartHostMethod = { struct UartHostMethod g_uartHostMethod = {
...@@ -229,30 +241,30 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -229,30 +241,30 @@ The following uses **uart_hi35xx.c** as an example to present the information re
- **Bind** function - **Bind** function
Input parameter: **Input parameter**:
**HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information. **HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information.
Return value: **Return value**:
HDF_STATUS<br/>The table below describes some status. For more information, see **HDF_STATUS** in the **/drivers/framework/include/utils/hdf_base.h** file. **HDF_STATUS**<br/>The table below describes some status. For more information, see **HDF_STATUS** in the **/drivers/framework/include/utils/hdf_base.h** file.
**Table 2** HDF_STATUS **Table 2** Description of HDF_STATUS
| Status| Description| | Status| Description|
| -------- | -------- | | -------- | -------- |
| HDF_ERR_INVALID_OBJECT | Invalid controller object.| | HDF_ERR_INVALID_OBJECT | Invalid controller object.|
| HDF_ERR_MALLOC_FAIL | Failed to allocate memory.| | HDF_ERR_MALLOC_FAIL | Failed to allocate memory.|
| HDF_ERR_INVALID_PARAM | Invalid parameter.| | HDF_ERR_INVALID_PARAM | Invalid parameter.|
| HDF_ERR_IO | I/O error.| | HDF_ERR_IO | I/O error.|
| HDF_SUCCESS | Initialization successful.| | HDF_SUCCESS | Initialization successful.|
| HDF_FAILURE | Initialization failed.| | HDF_FAILURE | Initialization failed.|
Function description: **Function description**:
Initializes the custom structure object and **UartHost**. Initializes the custom structure object and **UartHost**.
``` ```
//uart_hi35xx.c //uart_hi35xx.c
static int32_t HdfUartDeviceBind(struct HdfDeviceObject *device) static int32_t HdfUartDeviceBind(struct HdfDeviceObject *device)
...@@ -267,10 +279,10 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -267,10 +279,10 @@ The following uses **uart_hi35xx.c** as an example to present the information re
... ...
host = (struct UartHost *)OsalMemCalloc(sizeof(*host));// Allocate memory. host = (struct UartHost *)OsalMemCalloc(sizeof(*host));// Allocate memory.
... ...
host->device = device; // (Mandatory) Prerequisites for conversion between HdfDeviceObject and UartHost host->device = device; // (Mandatory) Prerequisites for conversion between HdfDeviceObject and UartHost.
device->service = &(host->service; // (Mandatory) Prerequisites for conversion between HdfDeviceObject and UartHost device->service = &(host->service; // (Mandatory) Prerequisites for conversion between HdfDeviceObject and UartHost.
host->device->service->Dispatch = UartIoDispatch;// Assign values to Dispatch of service. host->device->service->Dispatch = UartIoDispatch; // Assign values to Dispatch of service.
OsalAtomicSet(&host->atom, 0); // Initialize or set the atomic services. OsalAtomicSet(&host->atom, 0); // Initialize or set the atomic services.
host->priv = NULL; host->priv = NULL;
host->method = NULL; host->method = NULL;
return host; return host;
...@@ -279,19 +291,19 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -279,19 +291,19 @@ The following uses **uart_hi35xx.c** as an example to present the information re
- **Init** function - **Init** function
Input parameter: **Input parameter**:
**HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information. **HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information.
Return value: **Return value**:
HDF_STATUS **HDF_STATUS**
Function description: **Function description**:
Initializes the custom structure object and **UartHost**, calls the **artAddDev** function at the core layer, and connects to the VFS. Initializes the custom structure object and **UartHost**, calls the **artAddDev** function at the core layer, and connects to the VFS.
``` ```
int32_t HdfUartDeviceInit(struct HdfDeviceObject *device) int32_t HdfUartDeviceInit(struct HdfDeviceObject *device)
{ {
...@@ -303,7 +315,7 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -303,7 +315,7 @@ The following uses **uart_hi35xx.c** as an example to present the information re
... ...
ret = Hi35xxAttach(host, device); // Initialize the UartHost object. ret = Hi35xxAttach(host, device); // Initialize the UartHost object.
... ...
host->method = &g_uartHostMethod; // Hook the UartHostMethod instance. host->method = &g_uartHostMethod; // Attach the UartHostMethod instance.
return ret; return ret;
} }
// Initialize UartHost. // Initialize UartHost.
...@@ -351,30 +363,34 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -351,30 +363,34 @@ The following uses **uart_hi35xx.c** as an example to present the information re
``` ```
- **Release** function - **Release** function
Input parameter: **Input parameter**:
**HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information. **HdfDeviceObject**, an interface parameter exposed by the driver, contains the .hcs information.
Return value: **Return value**:
No value is returned. No value is returned.
Function description: **Function description**:
Releases the memory and deletes the controller. This function assigns values to the **Release** API in the driver entry structure. When the HDF fails to call the **Init** function to initialize the driver, the **Release** function can be called to release driver resources. All forced conversion operations for obtaining the corresponding object can be successful only when **Init()** has the corresponding value assignment operations. Releases the memory and deletes the controller. This function assigns values to the **Release** API in the driver entry structure. When the HDF fails to call the **Init** function to initialize the driver, the **Release** function can be called to release driver resources.
> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
>
> All forced conversion operations for obtaining the corresponding object can be successful only when **Init()** has the corresponding value assignment operations.
``` ```
void HdfUartDeviceRelease(struct HdfDeviceObject *device) void HdfUartDeviceRelease(struct HdfDeviceObject *device)
{ {
struct UartHost *host = NULL; struct UartHost *host = NULL;
... ...
host = UartHostFromDevice(device);// Forcibly convert HdfDeviceObject to UartHost by using service. For details about the value assignment, see the Bind function. host = UartHostFromDevice(device); // Forcibly convert HdfDeviceObject to UartHost by using service. For details about the value assignment, see the Bind function.
... ...
if (host->priv != NULL) { if (host->priv != NULL) {
Hi35xxDetach(host); // Customized memory release function. Hi35xxDetach(host); // Customized memory release function.
} }
UartHostDestroy(host); // Call the function of the core layer to release the host. UartHostDestroy(host); // Call the function of the core layer to release the host.
} }
static void Hi35xxDetach(struct UartHost *host) static void Hi35xxDetach(struct UartHost *host)
...@@ -382,10 +398,10 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -382,10 +398,10 @@ The following uses **uart_hi35xx.c** as an example to present the information re
struct UartDriverData *udd = NULL; struct UartDriverData *udd = NULL;
struct UartPl011Port *port = NULL; struct UartPl011Port *port = NULL;
... ...
udd = host->priv; // Convert UartHost to UartDriverData. udd = host->priv; // The conversion from UartHost to UartDriverData is involved.
... ...
UartRemoveDev(host);// Remove the VFS. UartRemoveDev (host); // Remove the VFS.
port = udd->private;// Convert UartDriverData to UartPl011Port. port = udd->private; // The conversion from UartDriverData to UartPl011Port is involved.
if (port != NULL) { if (port != NULL) {
if (port->physBase != 0) { if (port->physBase != 0) {
OsalIoUnmap((void *)port->physBase);// Unmap addresses. OsalIoUnmap((void *)port->physBase);// Unmap addresses.
...@@ -393,7 +409,7 @@ The following uses **uart_hi35xx.c** as an example to present the information re ...@@ -393,7 +409,7 @@ The following uses **uart_hi35xx.c** as an example to present the information re
OsalMemFree(port); OsalMemFree(port);
udd->private = NULL; udd->private = NULL;
} }
OsalMemFree(udd);//Release UartDriverData. OsalMemFree (udd); // Release UartDriverData.
host->priv = NULL; host->priv = NULL;
} }
``` ```
zh-cn/application-dev/database/database-mdds-guidelines.md
浏览文件 @ 3bc24b2e
...@@ -14,13 +14,13 @@ ...@@ -14,13 +14,13 @@
| 接口名称 | 描述 | | 接口名称 | 描述 |
| ------------------------------------------------------------ | ----------------------------------------------- | | ------------------------------------------------------------ | ----------------------------------------------- |
| createKVManager(config:KVManagerConfig,callback:AsyncCallback&lt;KVManager&gt;):void<br/>createKVManager(config:KVManagerConfig):Promise&lt;KVManager> | 创建一个`KVManager`对象实例，用于管理数据库对象。 | | createKVManager(config: KVManagerConfig, callback: AsyncCallback&lt;KVManager&gt;): void<br/>createKVManager(config: KVManagerConfig): Promise&lt;KVManager> | 创建一个`KVManager`对象实例，用于管理数据库对象。 |
| getKVStore&lt;TextendsKVStore&gt;(storeId:string,options:Options,callback:AsyncCallback&lt;T&gt;):void<br/>getKVStore&lt;TextendsKVStore&gt;(storeId:string,options:Options):Promise&lt;T&gt; | 指定`Options`和`storeId`，创建并获取`KVStore`数据库。 | | getKVStore&lt;TextendsKVStore&gt;(storeId: string, options: Options, callback: AsyncCallback&lt;T&gt;): void<br/>getKVStore&lt;TextendsKVStore&gt;(storeId: string, options: Options): Promise&lt;T&gt; | 指定`Options`和`storeId`，创建并获取`KVStore`数据库。 |
| put(key:string,value:Uint8Array\|string\|number\|boolean,callback:AsyncCallback&lt;void&gt;):void<br/>put(key:string,value:Uint8Array\|string\|number\|boolean):Promise&lt;void> | 插入和更新数据。 | | put(key: string, value: Uint8Array\|string\|number\|boolean, callback: AsyncCallback&lt;void&gt;): void<br/>put(key: string, value: Uint8Array\|string\|number\|boolean): Promise&lt;void> | 插入和更新数据。 |
| delete(key:string,callback:AsyncCallback&lt;void&gt;):void<br/>delete(key:string):Promise&lt;void> | 删除数据。 | | delete(key: string, callback: AsyncCallback&lt;void&gt;): void<br/>delete(key: string): Promise&lt;void> | 删除数据。 |
| get(key:string,callback:AsyncCallback&lt;Uint8Array\|string\|boolean\|number&gt;):void<br/>get(key:string):Promise&lt;Uint8Array\|string\|boolean\|number> | 查询数据。 | | get(key: string, callback: AsyncCallback&lt;Uint8Array\|string\|boolean\|number&gt;): void<br/>get(key: string): Promise&lt;Uint8Array\|string\|boolean\|number> | 查询数据。 |
| on(event:'dataChange',type:SubscribeType,observer:Callback&lt;ChangeNotification&gt;):void<br/>on(event:'syncComplete',syncCallback:Callback&lt;Array&lt;[string,number]&gt;&gt;):void | 订阅数据库中数据的变化。 | | on(event: 'dataChange', type: SubscribeType, observer: Callback&lt;ChangeNotification&gt;): void<br/>on(event: 'syncComplete', syncCallback: Callback&lt;Array&lt;[string,number]&gt;&gt;): void | 订阅数据库中数据的变化。 |
| sync(deviceIdList:string[],mode:SyncMode,allowedDelayMs?:number):void | 在手动模式下，触发数据库同步。 | | sync(deviceIdList: string[], mode: SyncMode, allowedDelayMs?: number): void | 在手动模式下，触发数据库同步。 |
...@@ -34,8 +34,40 @@ ...@@ -34,8 +34,40 @@
```js ```js
import distributedData from '@ohos.data.distributedData'; import distributedData from '@ohos.data.distributedData';
``` ```
2. 请求权限（同步操作时进行该步骤）。
2. 根据配置构造分布式数据库管理类实例。 需要在`config.json`文件里进行配置请求权限，示例代码如下：
```json
{
"module": {
"reqPermissions": [
{
"name": "ohos.permission.DISTRIBUTED_DATASYNC"
}
]
}
}
```
这个权限还需要在应用首次启动的时候弹窗获取用户授权，可以通过如下代码实现：
```js
import featureAbility from '@ohos.ability.featureAbility';
function grantPermission() {
console.info('grantPermission');
let context = featureAbility.getContext();
context.requestPermissionsFromUser(['ohos.permission.DISTRIBUTED_DATASYNC'], 666, function (result) {
console.info(`result.requestCode=${result.requestCode}`)
})
console.info('end grantPermission');
}
grantPermission();
```
3. 根据配置构造分布式数据库管理类实例。
1. 根据应用上下文创建`kvManagerConfig`对象。 1. 根据应用上下文创建`kvManagerConfig`对象。
2. 创建分布式数据库管理器实例。 2. 创建分布式数据库管理器实例。
...@@ -64,7 +96,7 @@ ...@@ -64,7 +96,7 @@
} }
``` ```
3. 获取/创建分布式数据库。 4. 获取/创建分布式数据库。
1. 声明需要创建的分布式数据库ID描述。 1. 声明需要创建的分布式数据库ID描述。
2. 创建分布式数据库，建议关闭自动同步功能（`autoSync:false`），需要同步时主动调用`sync`接口。 2. 创建分布式数据库，建议关闭自动同步功能（`autoSync:false`），需要同步时主动调用`sync`接口。
...@@ -98,7 +130,7 @@ ...@@ -98,7 +130,7 @@
> >
> 组网设备间同步数据的场景，建议在应用启动时打开分布式数据库，获取数据库的句柄。在该句柄（如示例中的`kvStore`）的生命周期内无需重复创建数据库，可直接使用句柄对数据库进行数据的插入等操作。 > 组网设备间同步数据的场景，建议在应用启动时打开分布式数据库，获取数据库的句柄。在该句柄（如示例中的`kvStore`）的生命周期内无需重复创建数据库，可直接使用句柄对数据库进行数据的插入等操作。
4. 订阅分布式数据变化。 5. 订阅分布式数据变化。
以下为订阅单版本分布式数据库数据变化通知的代码示例: 以下为订阅单版本分布式数据库数据变化通知的代码示例:
```js ```js
...@@ -107,7 +139,7 @@ ...@@ -107,7 +139,7 @@
}); });
``` ```
5. 将数据写入分布式数据库。 6. 将数据写入分布式数据库。
1. 构造需要写入分布式数据库的`Key`（键）和`Value`（值）。 1. 构造需要写入分布式数据库的`Key`（键）和`Value`（值）。
2. 将键值数据写入分布式数据库。 2. 将键值数据写入分布式数据库。
...@@ -130,7 +162,7 @@ ...@@ -130,7 +162,7 @@
} }
``` ```
6. 查询分布式数据库数据。 7. 查询分布式数据库数据。
1. 构造需要从单版本分布式数据库中查询的`Key`（键）。 1. 构造需要从单版本分布式数据库中查询的`Key`（键）。
2. 从单版本分布式数据库中获取数据。 2. 从单版本分布式数据库中获取数据。
...@@ -155,7 +187,7 @@ ...@@ -155,7 +187,7 @@
} }
``` ```
7. 同步数据到其他设备。 8. 同步数据到其他设备。
选择同一组网环境下的设备以及同步模式，进行数据同步。 选择同一组网环境下的设备以及同步模式，进行数据同步。
......
zh-cn/application-dev/database/database-relational-guidelines.md
浏览文件 @ 3bc24b2e
...@@ -16,8 +16,8 @@ ...@@ -16,8 +16,8 @@
| 接口名 | 描述 | | 接口名 | 描述 |
| -------- | -------- | | -------- | -------- |
|getRdbStore(config:StoreConfig,version:number):Promise&lt;RdbStore&gt; | 获得一个相关的RdbStore，操作关系型数据库，用户可以根据自己的需求配置RdbStore的参数，然后通过RdbStore调用相关接口可以执行相关的数据操作，使用Promise异步回调。<br/>-config：与此RDB存储相关的数据库配置。<br/>-version：数据库版本。 | |getRdbStore(config: StoreConfig, version: number): Promise&lt;RdbStore&gt; | 获得一个相关的RdbStore，操作关系型数据库，用户可以根据自己的需求配置RdbStore的参数，然后通过RdbStore调用相关接口可以执行相关的数据操作，使用Promise异步回调。<br/>-config：与此RDB存储相关的数据库配置。<br/>-version：数据库版本。 |
| deleteRdbStore(name:string):Promise&lt;void&gt; | 使用指定的数据库文件配置删除数据库，使用Promise异步回调。<br/>-name：数据库名称。 | | deleteRdbStore(name: string): Promise&lt;void&gt; | 使用指定的数据库文件配置删除数据库，使用Promise异步回调。<br/>-name：数据库名称。 |
### 数据库的增删改查 ### 数据库的增删改查
...@@ -31,7 +31,7 @@ ...@@ -31,7 +31,7 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | insert(name:string,values:ValuesBucket):Promise&lt;number&gt; | 向目标表中插入一行数据，使用Promise异步回调。<br>如果操作成功，返回行ID；否则返回-1。<br/>-name：指定的目标表名。<br/>-values：表示要插入到表中的数据行。 | | RdbStore | insert(name: string, values: ValuesBucket): Promise&lt;number&gt; | 向目标表中插入一行数据，使用Promise异步回调。<br>如果操作成功，返回行ID；否则返回-1。<br/>-name：指定的目标表名。<br/>-values：表示要插入到表中的数据行。 |
- **更新** - **更新**
...@@ -41,7 +41,7 @@ ...@@ -41,7 +41,7 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | update(values:ValuesBucket,rdbPredicates:RdbPredicates):Promise\<number> | 根据RdbPredicates的指定实例对象更新数据库中的数据，使用Promise异步回调。<br>返回受影响的行数。<br/>-values：以ValuesBucket存储的要更新的数据。<br/>-rdbPredicates：表示RdbPredicates的实例对象指定的更新条件。 | | RdbStore | update(values: ValuesBucket, rdbPredicates: RdbPredicates): Promise\<number> | 根据RdbPredicates的指定实例对象更新数据库中的数据，使用Promise异步回调。<br>返回受影响的行数。<br/>-values：以ValuesBucket存储的要更新的数据。<br/>-rdbPredicates：表示RdbPredicates的实例对象指定的更新条件。 |
- **删除** - **删除**
...@@ -51,7 +51,7 @@ ...@@ -51,7 +51,7 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | delete(rdbPredicates:RdbPredicates):Promise\<number> | 根据rdbPredicates的指定实例对象从数据库中删除数据，使用Promise异步回调。<br>返回受影响的行数。<br/>-rdbPredicates：RdbPredicates的实例对象指定的删除条件。 | | RdbStore | delete(rdbPredicates: RdbPredicates): Promise\<number> | 根据rdbPredicates的指定实例对象从数据库中删除数据，使用Promise异步回调。<br>返回受影响的行数。<br/>-rdbPredicates：RdbPredicates的实例对象指定的删除条件。 |
- **查询** - **查询**
...@@ -64,8 +64,8 @@ ...@@ -64,8 +64,8 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbStore | query(rdbPredicates:RdbPredicates,columns:Array):Promise&lt;ResultSet&gt; | 根据指定条件查询数据库中的数据，使用Promise异步回调。<br/>-rdbPredicates：表示RdbPredicates的实例对象指定的查询条件。<br/>-columns：表示要查询的列。如果值为空，则查询应用于所有列。 | | RdbStore | query(rdbPredicates: RdbPredicates, columns: Array): Promise&lt;ResultSet&gt; | 根据指定条件查询数据库中的数据，使用Promise异步回调。<br/>-rdbPredicates：表示RdbPredicates的实例对象指定的查询条件。<br/>-columns：表示要查询的列。如果值为空，则查询应用于所有列。 |
| RdbStore | querySql(sql:string,bindArgs?:Array&lt;ValueType&gt;):Promise&lt;ResultSet&gt; | 根据指定SQL语句查询数据库中的数据，使用Promise异步回调。<br/>-sql：指定要查询的SQL语句。<br/>-bindArgs：SQL语句中参数的值。 | | RdbStore | querySql(sql: string, bindArgs?: Array&lt;ValueType&gt;): Promise&lt;ResultSet&gt; | 根据指定SQL语句查询数据库中的数据，使用Promise异步回调。<br/>-sql：指定要查询的SQL语句。<br/>-bindArgs：SQL语句中参数的值。 |
### 数据库谓词的使用 ### 数据库谓词的使用
...@@ -77,11 +77,11 @@ ...@@ -77,11 +77,11 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| RdbPredicates | equalTo(field:string,value:ValueType):RdbPredicates | 配置谓词以匹配数据字段为ValueType且值等于指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回与指定字段匹配的谓词。 | | RdbPredicates | equalTo(field: string, value: ValueType): RdbPredicates | 配置谓词以匹配数据字段为ValueType且值等于指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates | notEqualTo(field:string,value:ValueType):RdbPredicates | 配置谓词以匹配数据字段为ValueType且值不等于指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回与指定字段匹配的谓词。 | | RdbPredicates | notEqualTo(field: string, value: ValueType): RdbPredicates | 配置谓词以匹配数据字段为ValueType且值不等于指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates | or():RdbPredicates | 将或条件添加到谓词中。<br/>-RdbPredicates：返回带有或条件的谓词。 | | RdbPredicates | or(): RdbPredicates | 将或条件添加到谓词中。<br/>-RdbPredicates：返回带有或条件的谓词。 |
| RdbPredicates | and():RdbPredicates | 向谓词添加和条件。<br/>-RdbPredicates：返回带有和条件的谓词。 | | RdbPredicates | and(): RdbPredicates | 向谓词添加和条件。<br/>-RdbPredicates：返回带有和条件的谓词。 |
| RdbPredicates | contains(field:string,value:string):RdbPredicats | 配置谓词以匹配数据字段为String且value包含指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回带有包含条件的谓词。 | | RdbPredicates | contains(field: string, value: string): RdbPredicats | 配置谓词以匹配数据字段为String且value包含指定值的字段。<br/>-field：数据库表中的列名。<br/>-value：指示要与谓词匹配的值。<br/>-RdbPredicates：返回带有包含条件的谓词。 |
### 查询结果集的使用 ### 查询结果集的使用
...@@ -97,12 +97,12 @@ ...@@ -97,12 +97,12 @@
| 类名 | 接口名 | 描述 | | 类名 | 接口名 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| ResultSet | goToFirstRow():boolean | 将结果集移动到第一行。 | | ResultSet | goToFirstRow(): boolean | 将结果集移动到第一行。 |
| ResultSet | getString(columnIndex:number):string | 获取当前行指定列的值，以String类型返回。 | | ResultSet | getString(columnIndex:number): string | 获取当前行指定列的值，以String类型返回。 |
| ResultSet | getBlob(columnIndex:number):Uint8Array | 获取当前行指定列的值，以字节数组形式返回。 | | ResultSet | getBlob(columnIndex:number): Uint8Array | 获取当前行指定列的值，以字节数组形式返回。 |
| ResultSet | getDouble(columnIndex:number):number | 获取当前行指定列的值，以double型返回。 | | ResultSet | getDouble(columnIndex:number): number | 获取当前行指定列的值，以double型返回。 |
| ResultSet | getLong(columnIndex:number):number | 获取当前行指定列的值，以Long形式返回。 | | ResultSet | getLong(columnIndex:number): number | 获取当前行指定列的值，以Long形式返回。 |
| ResultSet | close():void | 关闭结果集。 | | ResultSet | close(): void | 关闭结果集。 |
......
zh-cn/application-dev/device/usb-guidelines.md
浏览文件 @ 3bc24b2e
...@@ -17,19 +17,19 @@ USB类开放能力如下，具体请查阅[API参考文档](../reference/apis/js ...@@ -17,19 +17,19 @@ USB类开放能力如下，具体请查阅[API参考文档](../reference/apis/js
| 接口名 | 描述 | | 接口名 | 描述 |
| -------- | -------- | | -------- | -------- |
| hasRight(deviceName:string):boolean | 如果“使用者”（如各种App或系统）有权访问设备则返回true；无权访问设备则返回false。 | | hasRight(deviceName: string): boolean | 如果“使用者”（如各种App或系统）有权访问设备则返回true；无权访问设备则返回false。 |
| requestRight(deviceName:string):Promise&lt;boolean&gt; | 请求给定软件包的临时权限以访问设备。 | | requestRight(deviceName: string): Promise&lt;boolean&gt; | 请求给定软件包的临时权限以访问设备。 |
| connectDevice(device:USBDevice):Readonly&lt;USBDevicePipe&gt; | 根据`getDevices()`返回的设备信息打开USB设备。 | | connectDevice(device: USBDevice): Readonly&lt;USBDevicePipe&gt; | 根据`getDevices()`返回的设备信息打开USB设备。 |
| getDevices():Array&lt;Readonly&lt;USBDevice&gt;&gt; | 返回USB设备列表。 | | getDevices(): Array&lt;Readonly&lt;USBDevice&gt;&gt; | 返回USB设备列表。 |
| setConfiguration(pipe:USBDevicePipe,config:USBConfig):number | 设置设备的配置。 | | setConfiguration(pipe: USBDevicePipe, config: USBConfig): number | 设置设备的配置。 |
| setInterface(pipe:USBDevicePipe,iface:USBInterface):number | 设置设备的接口。 | | setInterface(pipe: USBDevicePipe, iface: USBInterface): number | 设置设备的接口。 |
| claimInterface(pipe:USBDevicePipe,iface:USBInterface,force?:boolean):number | 获取接口。 | | claimInterface(pipe: USBDevicePipe, iface: USBInterface, force?: boolean): number | 获取接口。 |
|bulkTransfer(pipe:USBDevicePipe,endpoint:USBEndpoint,buffer:Uint8Array,timeout?:number):Promise&lt;number&gt; | 批量传输。 | |bulkTransfer(pipe: USBDevicePipe, endpoint: USBEndpoint, buffer: Uint8Array, timeout?: number): Promise&lt;number&gt; | 批量传输。 |
| closePipe(pipe:USBDevicePipe):number | 关闭设备消息控制通道。 | | closePipe(pipe: USBDevicePipe): number | 关闭设备消息控制通道。 |
| releaseInterface(pipe:USBDevicePipe,iface:USBInterface):number | 释放接口。 | | releaseInterface(pipe: USBDevicePipe, iface: USBInterface): number | 释放接口。 |
| getFileDescriptor(pipe:USBDevicePipe):number | 获取文件描述符。 | | getFileDescriptor(pipe: USBDevicePipe): number | 获取文件描述符。 |
| getRawDescriptor(pipe:USBDevicePipe):Uint8Array | 获取原始的USB描述符。 | | getRawDescriptor(pipe: USBDevicePipe): Uint8Array | 获取原始的USB描述符。 |
| controlTransfer(pipe:USBDevicePipe,contrlparam:USBControlParams,timeout?:number):Promise&lt;number&gt; | 控制传输。 | | controlTransfer(pipe: USBDevicePipe, contrlparam: USBControlParams, timeout?: number): Promise&lt;number&gt; | 控制传输。 |
## 开发步骤 ## 开发步骤
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zh-cn/application-dev/device/usb-overview.md
浏览文件 @ 3bc24b2e
...@@ -9,7 +9,7 @@ USB服务是应用访问底层的一种设备抽象概念。开发者根据提 ...@@ -9,7 +9,7 @@ USB服务是应用访问底层的一种设备抽象概念。开发者根据提
USB服务系统包含USB API、USB Service、USB HAL。 USB服务系统包含USB API、USB Service、USB HAL。
**图2** USB服务运作机制 **图1** USB服务运作机制
![zh-cn_image_0000001237821727](figures/zh-cn_image_0000001237821727.png) ![zh-cn_image_0000001237821727](figures/zh-cn_image_0000001237821727.png)
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zh-cn/application-dev/media/audio-recorder.md
浏览文件 @ 3bc24b2e
...@@ -191,6 +191,5 @@ export class AudioRecorderDemo { ...@@ -191,6 +191,5 @@ export class AudioRecorderDemo {
针对音频录制开发，有以下相关实例可供参考： 针对音频录制开发，有以下相关实例可供参考：
- [`Recorder:`录音机（eTS）（API8）（Full SDK）](https://gitee.com/openharmony/applications_app_samples/tree/master/media/Recorder) - [`Recorder:`录音机（eTS）（API8）（Full SDK）](https://gitee.com/openharmony/applications_app_samples/tree/master/media/Recorder)
- [`JsRecorder`：录音机（JS）（API8)](https://gitee.com/openharmony/applications_app_samples/tree/master/media/JSRecorder)
- [`eTsAudioPlayer`: 音频播放器（eTS）（API8）](https://gitee.com/openharmony/applications_app_samples/blob/master/media/Recorder/entry/src/main/ets/MainAbility/pages/Play.ets) - [`eTsAudioPlayer`: 音频播放器（eTS）（API8）](https://gitee.com/openharmony/applications_app_samples/blob/master/media/Recorder/entry/src/main/ets/MainAbility/pages/Play.ets)
- [音频播放器（eTS）（API9）](https://gitee.com/openharmony/codelabs/tree/master/Media/Audio_OH_ETS) - [音频播放器（eTS）（API9）](https://gitee.com/openharmony/codelabs/tree/master/Media/Audio_OH_ETS)
zh-cn/application-dev/reference/apis/js-apis-data-rdb.md
浏览文件 @ 3bc24b2e
...@@ -29,7 +29,7 @@ getRdbStore(context: Context, config: StoreConfig, version: number, callback: As ...@@ -29,7 +29,7 @@ getRdbStore(context: Context, config: StoreConfig, version: number, callback: As
| 参数名 | 类型 | 必填 | 说明 | | 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| context | Context | 是 | 应用程序或功能的上下文。 <br>API version 9之前的Context定义见[Context](js-apis-Context.md)。<br>API version 9及之后的Context定义见[Context](js-apis-ability-context.md)。| | context | [Context](js-apis-Context.md) | 是 | 应用上下文。|
| config | [StoreConfig](#storeconfig) | 是 | 与此RDB存储相关的数据库配置。 | | config | [StoreConfig](#storeconfig) | 是 | 与此RDB存储相关的数据库配置。 |
| version | number | 是 | 数据库版本。 | | version | number | 是 | 数据库版本。 |
| callback | AsyncCallback&lt;[RdbStore](#rdbstore)&gt; | 是 | 指定callback回调函数，返回一个RdbStore。 | | callback | AsyncCallback&lt;[RdbStore](#rdbstore)&gt; | 是 | 指定callback回调函数，返回一个RdbStore。 |
...@@ -37,8 +37,13 @@ getRdbStore(context: Context, config: StoreConfig, version: number, callback: As ...@@ -37,8 +37,13 @@ getRdbStore(context: Context, config: StoreConfig, version: number, callback: As
**示例：** **示例：**
```js ```js
// 获取context
import featureAbility from '@ohos.ability.featureAbility'
var context = featureAbility.getContext()
// 获取context后调用getRdbStore
const STORE_CONFIG = { name: "RdbTest.db"} const STORE_CONFIG = { name: "RdbTest.db"}
data_rdb.getRdbStore(this.context, STORE_CONFIG, 1, function (err, rdbStore) { data_rdb.getRdbStore(context, STORE_CONFIG, 1, function (err, rdbStore) {
if (err) { if (err) {
console.info("Get RdbStore failed, err: " + err) console.info("Get RdbStore failed, err: " + err)
return return
...@@ -59,7 +64,7 @@ getRdbStore(context: Context, config: StoreConfig, version: number): Promise&lt; ...@@ -59,7 +64,7 @@ getRdbStore(context: Context, config: StoreConfig, version: number): Promise&lt;
| 参数名 | 类型 | 必填 | 说明 | | 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| context | Context | 是 | 应用程序或功能的上下文。 <br>API version 9之前的Context定义见[Context](js-apis-Context.md)。<br>API version 9及之后的Context定义见[Context](js-apis-ability-context.md)。 | | context | [Context](js-apis-Context.md) | 是 | 应用上下文。 |
| config | [StoreConfig](#storeconfig) | 是 | 与此RDB存储相关的数据库配置。 | | config | [StoreConfig](#storeconfig) | 是 | 与此RDB存储相关的数据库配置。 |
| version | number | 是 | 数据库版本。 | | version | number | 是 | 数据库版本。 |
...@@ -72,8 +77,13 @@ getRdbStore(context: Context, config: StoreConfig, version: number): Promise&lt; ...@@ -72,8 +77,13 @@ getRdbStore(context: Context, config: StoreConfig, version: number): Promise&lt;
**示例：** **示例：**
```js ```js
// 获取context
import featureAbility from '@ohos.ability.featureAbility'
var context = featureAbility.getContext()
// 获取context后调用getRdbStore
const STORE_CONFIG = { name: "RdbTest.db" } const STORE_CONFIG = { name: "RdbTest.db" }
let promise = data_rdb.getRdbStore(this.context, STORE_CONFIG, 1); let promise = data_rdb.getRdbStore(context, STORE_CONFIG, 1);
promise.then(async (rdbStore) => { promise.then(async (rdbStore) => {
console.log("Get RdbStore successfully.") console.log("Get RdbStore successfully.")
}).catch((err) => { }).catch((err) => {
...@@ -92,13 +102,18 @@ deleteRdbStore(context: Context, name: string, callback: AsyncCallback&lt;void&g ...@@ -92,13 +102,18 @@ deleteRdbStore(context: Context, name: string, callback: AsyncCallback&lt;void&g
**参数：** **参数：**
| 参数名 | 类型 | 必填 | 说明 | | 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| context | Context | 是 | 应用程序或功能的上下文。 <br>API version 9之前的Context定义见[Context](js-apis-Context.md)。<br>API version 9及之后的Context定义见[Context](js-apis-ability-context.md)。| | context | [Context](js-apis-Context.md) | 是 | 应用上下文。|
| name | string | 是 | 数据库名称。 | | name | string | 是 | 数据库名称。 |
| callback | AsyncCallback&lt;void&gt; | 是 | 指定callback回调函数。 | | callback | AsyncCallback&lt;void&gt; | 是 | 指定callback回调函数。 |
**示例：** **示例：**
```js ```js
data_rdb.deleteRdbStore(this.context, "RdbTest.db", function (err, rdbStore) { // 获取context
import featureAbility from '@ohos.ability.featureAbility'
var context = featureAbility.getContext()
// 获取context后调用deleteRdbStore
data_rdb.deleteRdbStore(context, "RdbTest.db", function (err) {
if (err) { if (err) {
console.info("Delete RdbStore failed, err: " + err) console.info("Delete RdbStore failed, err: " + err)
return return
...@@ -118,7 +133,7 @@ deleteRdbStore(context: Context, name: string): Promise&lt;void&gt; ...@@ -118,7 +133,7 @@ deleteRdbStore(context: Context, name: string): Promise&lt;void&gt;
**参数** **参数**
| 参数名 | 类型 | 必填 | 说明 | | 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- |
| context | Context | 是 | 应用程序或功能的上下文。 <br>API version 9之前的Context定义见[Context](js-apis-Context.md)。<br>API version 9及之后的Context定义见[Context](js-apis-ability-context.md)。| | context | [Context](js-apis-Context.md) | 是 | 应用上下文。|
| name | string | 是 | 数据库名称。 | | name | string | 是 | 数据库名称。 |
**返回值**： **返回值**：
...@@ -128,7 +143,12 @@ deleteRdbStore(context: Context, name: string): Promise&lt;void&gt; ...@@ -128,7 +143,12 @@ deleteRdbStore(context: Context, name: string): Promise&lt;void&gt;
**示例：** **示例：**
```js ```js
let promise = data_rdb.deleteRdbStore(this.context, "RdbTest.db") // 获取context
import featureAbility from '@ohos.ability.featureAbility'
var context = featureAbility.getContext()
// 获取context后调用deleteRdbStore
let promise = data_rdb.deleteRdbStore(context, "RdbTest.db")
promise.then(()=>{ promise.then(()=>{
console.log("Delete RdbStore successfully.") console.log("Delete RdbStore successfully.")
}).catch((err) => { }).catch((err) => {
......
zh-cn/application-dev/reference/apis/js-apis-prompt.md
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...@@ -45,7 +45,7 @@ showToast(options: ShowToastOptions): void ...@@ -45,7 +45,7 @@ showToast(options: ShowToastOptions): void
| 名称 | 类型 | 必填 | 说明 | | 名称 | 类型 | 必填 | 说明 |
| -------- | -------------- | ---- | ---------------------------------------- | | -------- | -------------- | ---- | ---------------------------------------- |
| message | string | 是 | 显示的文本信息。 | | message | string | 是 | 显示的文本信息。 |
| duration | number | 否 | 默认值1500ms，建议区间：1500ms-10000ms，若小于1500ms则取默认值。 | | duration | number | 否 | 默认值1500ms，取值区间：1500ms-10000ms。若小于1500ms则取默认值，若大于10000ms则取上限值10000ms。 |
| bottom | &lt;length&gt; | 否 | 设置弹窗边框距离屏幕底部的位置。 | | bottom | &lt;length&gt; | 否 | 设置弹窗边框距离屏幕底部的位置。 |
## prompt.showDialog ## prompt.showDialog
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zh-cn/application-dev/reference/arkui-ts/ts-basic-components-textclock.md
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...@@ -27,9 +27,9 @@ TextClock(options?: {timeZoneOffset?: number, controller?: TextClockController}) ...@@ -27,9 +27,9 @@ TextClock(options?: {timeZoneOffset?: number, controller?: TextClockController})
## 属性 ## 属性
| 名称 | 参数类型 | 默认值 | 描述 | | 名称 | 参数类型 | 默认值 | 描述 |
| ------ | ------ | -------- | ---------------------------------------- | | ------ | -------- | ------ | ------------------------------------------------------------ |
| format | string | 'hhmmss' | 设置显示时间格式，如“yyyy/mm/dd”、“yyyy-mm-dd”等。支持的时间格式化字符串：<ul><li>yyyy（年份）</li><li>mm（英文月份简写）</li><li>mmm（英文月份简写）</li><li>mmmm（英文月份全称）</li><li>dd（英文星期简写）</li><li>ddd（英文星期简写）</li><li>dddd（英文星期全称）</li><li>HH（24小时制）</li><li>hh（12小时制）</li><li>MM/mm（分钟）</li><li>SS/ss（秒）</li></ul> | | format | string | 'hms' | 设置显示时间格式。<br/>日期间隔符固定为"/"，时间间隔符为":"。<br/>如yyyyMMdd，yyyy-MM-dd显示为yyyy/MM/dd，<br/>hhmmss显示为hh:mm:ss。 <br/>时间格式只用写一位即可，如"hhmmss"等同于"hms"。<br/>支持的时间格式化字符串：<br/>- YYYY/yyyy：完整年份。<br/>- YY/yy：年份后两位。<br/>- M：月份(若想使用01月则使用MM)。<br/>- d：日期(若想使用01日则使用dd)。<br/>- D：年中日(一年中的第几天)。<br/>- H：24小时制。<br/>- h：12小时制。<br/>- m：分钟。<br/>- s：秒。<br/>- SSS：毫秒。 |
## 事件 ## 事件
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zh-cn/application-dev/reference/arkui-ts/ts-basic-components-textpicker.md
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...@@ -42,7 +42,7 @@ TextPicker(options?: {range: string[] | [Resource](ts-types.md#resource), select ...@@ -42,7 +42,7 @@ TextPicker(options?: {range: string[] | [Resource](ts-types.md#resource), select
| 名称 | 描述 | | 名称 | 描述 |
| ------------------------------------------------------------ | ------------------------------------------------------------ | | ------------------------------------------------------------ | ------------------------------------------------------------ |
| onChange(callback:&nbsp;(value:&nbsp;string,&nbsp;index:&nbsp;number)&nbsp;=&gt;&nbsp;void) | 滑动选中TextPicker文本内容后，触发该回调。<br/>-&nbsp;value:&nbsp;当前选中项的文本。<br/>-&nbsp;index:&nbsp;当前选中项的下标。 | | onChange(callback:&nbsp;(value:&nbsp;string,&nbsp;index:&nbsp;number)&nbsp;=&gt;&nbsp;void) | 滑动选中TextPicker文本内容后，触发该回调。<br/>-&nbsp;value:&nbsp;当前选中项的文本。<br/>-&nbsp;index:&nbsp;当前选中项的索引值。 |
## 示例 ## 示例
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zh-cn/application-dev/reference/arkui-ts/ts-basic-components-xcomponent.md
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...@@ -49,7 +49,7 @@ onDestroy(event: () => void ) ...@@ -49,7 +49,7 @@ onDestroy(event: () => void )
## XComponentController ## XComponentController
xcomponent 组件的控制器，可以将此对象绑定至XComponent组件，然后通过控制器带调用组件方法。 xcomponent 组件的控制器，可以将此对象绑定至XComponent组件，然后通过控制器来调用组件方法。
### 创建对象 ### 创建对象
...@@ -59,7 +59,7 @@ xcomponentController: XComponentController = new XComponentController() ...@@ -59,7 +59,7 @@ xcomponentController: XComponentController = new XComponentController()
### getXComponentSurfaceId ### getXComponentSurfaceId
getXComponentSurfaceId(): string getXComponentSurfaceId()
获取XComponent对应Surface的ID，供@ohos接口使用，比如camera相关接口。 获取XComponent对应Surface的ID，供@ohos接口使用，比如camera相关接口。
...@@ -71,9 +71,10 @@ getXComponentSurfaceId(): string ...@@ -71,9 +71,10 @@ getXComponentSurfaceId(): string
| ------ | ----------------------- | | ------ | ----------------------- |
| string | XComponent持有Surface的ID。 | | string | XComponent持有Surface的ID。 |
### setXComponentSurfaceSize ### setXComponentSurfaceSize
setXComponentSurfaceSize(value: {surfaceWidth: number, surfaceHeight: number}): void setXComponentSurfaceSize(value: {surfaceWidth: number, surfaceHeight: number})
设置XComponent持有Surface的宽度和高度。 设置XComponent持有Surface的宽度和高度。
...@@ -86,9 +87,10 @@ setXComponentSurfaceSize(value: {surfaceWidth: number, surfaceHeight: number}): ...@@ -86,9 +87,10 @@ setXComponentSurfaceSize(value: {surfaceWidth: number, surfaceHeight: number}):
| surfaceWidth | number | 是 | XComponent持有Surface的宽度。 | | surfaceWidth | number | 是 | XComponent持有Surface的宽度。 |
| surfaceHeight | number | 是 | XComponent持有Surface的高度。 | | surfaceHeight | number | 是 | XComponent持有Surface的高度。 |
### getXComponentContext ### getXComponentContext
getXComponentContext(): Object getXComponentContext()
获取XComponent实例对象的context。 获取XComponent实例对象的context。
...@@ -98,6 +100,7 @@ getXComponentContext(): Object ...@@ -98,6 +100,7 @@ getXComponentContext(): Object
| ------ | ---------------------------------------- | | ------ | ---------------------------------------- |
| Object | 获取XComponent实例对象的context，context包含的具体接口方法由开发者自定义。 | | Object | 获取XComponent实例对象的context，context包含的具体接口方法由开发者自定义。 |
## 示例 ## 示例
提供surface类型XComponent，支持相机预览等能力。 提供surface类型XComponent，支持相机预览等能力。
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zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-longpressgesture.md
浏览文件 @ 3bc24b2e
# LongPressGesture # LongPressGesture
> **说明：** > **说明：**
>
> 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,25 +15,21 @@ LongPressGesture(options?: { fingers?: number, repeat?: boolean, duration?: numb ...@@ -16,25 +15,21 @@ LongPressGesture(options?: { fingers?: number, repeat?: boolean, duration?: numb
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | ------- | ---- | ----- | -------------------------------- | | -------- | -------- | -------- | -------- | -------- |
| fingers | number | 否 | 1 | 触发长按的最少手指数，最小为1指，&nbsp;最大取值为10指。 | | fingers | number | 否 | 1 | 触发长按的最少手指数，最小为1指，&nbsp;最大取值为10指。 |
| repeat | boolean | 否 | false | 是否连续触发事件回调。 | | repeat | boolean | 否 | false | 是否连续触发事件回调。 |
| duration | number | 否 | 500 | 最小触发长按的时间，单位为毫秒（ms）。 | | duration | number | 否 | 500 | 触发长按的最短时间，单位为毫秒（ms）。 |
## 事件 ## 事件
| 名称 | 功能描述 | | 名称 | 功能描述 |
| ---------------------------------------- | ------------------------------ | | -------- | -------- |
| onAction((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功回调。 | | onAction((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功回调。 |
| onActionEnd((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功，手指抬起后触发回调。 | | onActionEnd((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功，手指抬起后触发回调。 |
| onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功，接收到触摸取消事件触发回调。 | | onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | LongPress手势识别成功，接收到触摸取消事件触发回调。 |
## GestureEvent对象中与LongPress手势相关的属性
| 属性名称 | 属性类型 | 描述 |
| ------ | ------- | ------------ |
| repeat | boolean | 事件是否为重复触发事件。 |
## 示例 ## 示例
......
zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-pangesture.md
浏览文件 @ 3bc24b2e
# PanGesture # PanGesture
> **说明：** > **说明：**
>
> 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,24 +15,25 @@ PanGesture(options?: { fingers?: number, direction?: PanDirection, distance?: nu ...@@ -16,24 +15,25 @@ PanGesture(options?: { fingers?: number, direction?: PanDirection, distance?: nu
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| --------- | ------------ | ---- | ------ | ------------------------------------------------------------ | | -------- | -------- | -------- | -------- | -------- |
| fingers | number | 否 | 1 | 触发滑动的最少手指数，最小为1指，&nbsp;最大取值为10指。 | | fingers | number | 否 | 1 | 触发拖动的最少手指数，最小为1指，&nbsp;最大取值为10指。 |
| direction | PanDirection | 否 | All | 设置滑动方向，此枚举值支持逻辑与(&amp;)和逻辑或（\|）运算。 | | direction | PanDirection | 否 | PanDirection.All | 触发拖动的手势方向，此枚举值支持逻辑与(&amp;)和逻辑或（\|）运算。 |
| distance | number | 否 | 5.0 | 最小滑动识别距离，单位为vp。<br/>**说明：**<br/>> tab滑动与该拖动手势事件同时存在时，可将distance值设为1，使拖动更灵敏，避免造成事件错乱。 | | distance | number | 否 | 5.0 | 最小拖动识别距离，单位为vp。<br/>**说明：**<br/>> tab滑动与该拖动手势事件同时存在时，可将distance值设为1，使拖动更灵敏，避免造成事件错乱。 |
## PanDirection枚举说明 ## PanDirection枚举说明
| 名称 | 描述 | | 名称 | 描述 |
| ---------- | ---------- | | -------- | -------- |
| All | 所有方向可滑动。 | | All | 所有方向。 |
| Horizontal | 水平方向可滑动。 | | Horizontal | 水平方向。 |
| Vertical | 竖直方向可滑动。 | | Vertical | 竖直方向。 |
| Left | 向左滑动。 | | Left | 向左拖动。 |
| Right | 向右滑动。 | | Right | 向右拖动。 |
| Up | 向上滑动。 | | Up | 向上拖动。 |
| Down | 向下滑动。 | | Down | 向下拖动。 |
| None | 任何方向都不可滑动。 | | None | 任何方向都不可触发拖动手势事件。 |
## PanGestureOptions ## PanGestureOptions
...@@ -43,31 +43,26 @@ PanGestureOptions(options?: { fingers?: number, direction?: PanDirection, distan ...@@ -43,31 +43,26 @@ PanGestureOptions(options?: { fingers?: number, direction?: PanDirection, distan
**参数：** **参数：**
同PanGesture参数说明。 同PanGesture参数说明。
**接口：** **接口：**
| 名称 | 功能描述 | | 名称 | 功能描述 |
| -------------------------------------- | -------------- | | -------- | -------- |
| setDirection(value:&nbsp;PanDirection) | 设置direction属性。 | | setDirection(value:&nbsp;PanDirection) | 设置direction属性。 |
| setDistance(value:&nbsp;number) | 设置distance属性。 | | setDistance(value:&nbsp;number) | 设置distance属性。 |
| setFingers(value:&nbsp;number) | 设置fingers属性。 | | setFingers(value:&nbsp;number) | 设置fingers属性。 |
## 事件 ## 事件
| 名称 | 功能描述 | | 名称 | 功能描述 |
| ---------------------------------------- | ------------------------ | | -------- | -------- |
| onActionStart(callback:&nbsp;(event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pan手势识别成功回调。 | | onActionStart(callback:&nbsp;(event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pan手势识别成功回调。 |
| onActionUpdate(callback:&nbsp;(event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pan手势移动过程中回调。 | | onActionUpdate(callback:&nbsp;(event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pan手势移动过程中回调。 |
| onActionEnd(callback:&nbsp;(event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pan手势识别成功，手指抬起后触发回调。 | | onActionEnd(callback:&nbsp;(event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pan手势识别成功，手指抬起后触发回调。 |
| onActionCancel(callback:&nbsp;()&nbsp;=&gt;&nbsp;void) | Pan手势识别成功，接收到触摸取消事件触发回调。 | | onActionCancel(callback:&nbsp;()&nbsp;=&gt;&nbsp;void) | Pan手势识别成功，接收到触摸取消事件触发回调。 |
## GestureEvent对象中与Pan手势相关的属性
| 属性名称 | 属性类型 | 描述 |
| ------- | ------ | -------------- |
| offsetX | number | 手势事件偏移量，单位为vp。 |
| offsetY | number | 手势事件偏移量，单位为vp。 |
## 示例 ## 示例
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zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-pinchgesture.md
浏览文件 @ 3bc24b2e
# PinchGesture # PinchGesture
> **说明：** > **说明：**
>
> 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,27 +15,21 @@ PinchGesture(options?: { fingers?: number, distance?: number }) ...@@ -16,27 +15,21 @@ PinchGesture(options?: { fingers?: number, distance?: number })
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | ------ | ---- | ---- | ----------------------------- | | -------- | -------- | -------- | -------- | -------- |
| fingers | number | 否 | 2 | 触发捏合的最少手指数,&nbsp;最小为2指，最大为5指。 | | fingers | number | 否 | 2 | 触发捏合的最少手指数,&nbsp;最小为2指，最大为5指。 |
| distance | number | 否 | 3.0 | 最小识别距离，单位为vp。 | | distance | number | 否 | 3.0 | 最小识别距离，单位为vp。 |
## 事件 ## 事件
| 名称 | 功能描述 | | 名称 | 功能描述 |
| ---------------------------------------- | -------------------------- | | -------- | -------- |
| onActionStart((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功回调。 | | onActionStart((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功回调。 |
| onActionUpdate((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pinch手势移动过程中回调。 | | onActionUpdate((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pinch手势移动过程中回调。 |
| onActionEnd((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功，手指抬起后触发回调。 | | onActionEnd((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功，手指抬起后触发回调。 |
| onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功，接收到触摸取消事件触发回调。 | | onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | Pinch手势识别成功，接收到触摸取消事件触发回调。 |
## GestureEvent对象中与Pinch手势相关的属性
| 属性名称 | 属性类型 | 描述 |
| ------------ | ------ | -------------------------- |
| scale | number | 缩放比例，用于PinchGesture手势触发场景。 |
| pinchCenterX | number | 捏合手势中心点X轴坐标，单位为px。 |
| pinchCenterY | number | 捏合手势中心点Y轴坐标，单位为px。 |
## 示例 ## 示例
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zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-rotationgesture.md
浏览文件 @ 3bc24b2e
# RotationGesture # RotationGesture
> **说明：** > **说明：**
>
> 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,25 +15,21 @@ RotationGesture(options?: { fingers?: number, angle?: number }) ...@@ -16,25 +15,21 @@ RotationGesture(options?: { fingers?: number, angle?: number })
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ------ | ---- | ---- | ----------------------------- | | -------- | -------- | -------- | -------- | -------- |
| fingers | number | 否 | 2 | 触发旋转的最少手指数,&nbsp;最小为2指，最大为5指。 | | fingers | number | 否 | 2 | 触发旋转的最少手指数,&nbsp;最小为2指，最大为5指。 |
| angle | number | 否 | 1.0 | 触发旋转手势的最小改变度数，单位为度数。 | | angle | number | 否 | 1.0 | 触发旋转手势的最小改变度数，单位为deg。 |
## 事件 ## 事件
| 名称 | 功能描述 | | 名称 | 功能描述 |
| ---------------------------------------- | ----------------------------- | | -------- | -------- |
| onActionStart((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功回调。 | | onActionStart((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功回调。 |
| onActionUpdate((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Rotation手势移动过程中回调。 | | onActionUpdate((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Rotation手势移动过程中回调。 |
| onActionEnd((event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功，手指抬起后触发回调。 | | onActionEnd((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功，手指抬起后触发回调。 |
| onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功，接收到触摸取消事件触发回调。 | | onActionCancel(event:&nbsp;()&nbsp;=&gt;&nbsp;void) | Rotation手势识别成功，接收到触摸取消事件触发回调。 |
## GestureEvent对象中与Rotation手势相关的属性
| 属性名称 | 属性类型 | 描述 |
| ----- | ------ | ----- |
| angle | number | 旋转角度。 |
## 示例 ## 示例
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zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-swipegesture.md
浏览文件 @ 3bc24b2e
# SwipeGesture # SwipeGesture
> **说明：** > **说明：**
>
> 从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,32 +15,28 @@ SwipeGesture(value?: { fingers?: number; direction?: SwipeDirection; speed?: num ...@@ -16,32 +15,28 @@ SwipeGesture(value?: { fingers?: number; direction?: SwipeDirection; speed?: num
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| --------- | -------------- | ---- | ------------------ | ----------------------------- | | -------- | -------- | -------- | -------- | -------- |
| fingers | number | 否 | 1 | 触发滑动的最少手指数，默认为1，最小为1指，最大为10指。 | | fingers | number | 否 | 1 | 触发滑动的最少手指数，默认为1，最小为1指，最大为10指。 |
| direction | SwipeDirection | 否 | SwipeDirection.All | 滑动方向。 | | direction | SwipeDirection | 否 | SwipeDirection.All | 触发滑动手势的滑动方向。 |
| speed | number | 否 | 100 | 识别滑动的最小速度（100VP/秒）。 | | speed | number | 否 | 100 | 识别滑动的最小速度（默认为100vp/秒）。 |
## SwipeDirection枚举说明 ## SwipeDirection枚举说明
| 名称 | 描述 | | 名称 | 描述 |
| ---------- | ----- | | -------- | -------- |
| All | 所有方向。 | | All | 所有方向。 |
| Horizontal | 水平方向。 | | Horizontal | 水平方向。 |
| Vertical | 竖直方向。 | | Vertical | 竖直方向。 |
| None | 任何方向均不可触发。 |
## 事件
| 名称 | 功能描述 | ## 事件
| ---------------------------------------- | ----------- |
| onAction(callback:(event?:&nbsp;GestureEvent)&nbsp;=&gt;&nbsp;void) | 滑动手势识别成功回调。 |
## GestureEvent对象中与Swipe手势相关的属性 | 名称 | 功能描述 |
| -------- | -------- |
| onAction(callback:(event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | 滑动手势识别成功回调。 |
| 参数名 | 类型 | 说明 |
| ----- | ------ | ---------------------------------------- |
| angle | number | 滑动手势的角度，即两根手指间的线段与水平方向的夹角变化的度数。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;角度计算方式：滑动手势被识别到后，连接两根手指之间的线被识别为起始线条，随着手指的滑动，手指之间的线条会发生旋转，根据起始线条两端点和当前线条两端点的坐标，使用反正切函数分别计算其相对于水平方向的夹角，最后arctan2(cy2-cy1,cx2-cx1)-arctan2(y2-y1,x2-x1)为旋转的角度。以起始线条为坐标系，顺时针旋转为0到180度，逆时针旋转为-180到0度。 |
| speed | number | 滑动手势的速度，是所有手指滑动的平均速度，单位为VP/秒。 |
![zh-cn_image_0000001231374559](figures/zh-cn_image_0000001231374661.png) ![zh-cn_image_0000001231374559](figures/zh-cn_image_0000001231374661.png)
## 示例 ## 示例
...@@ -64,7 +59,7 @@ struct SwipeGestureExample { ...@@ -64,7 +59,7 @@ struct SwipeGestureExample {
.width(260).height(260) .width(260).height(260)
.rotate({x: 0, y: 0, z: 1, angle: this.rotateAngle}) .rotate({x: 0, y: 0, z: 1, angle: this.rotateAngle})
.gesture( .gesture(
SwipeGesture({fingers: 1, direction:SwipeDirection.Vertical}) SwipeGesture({fingers: 1, direction: SwipeDirection.Vertical})
.onAction((event: GestureEvent) => { .onAction((event: GestureEvent) => {
this.speed = event.speed this.speed = event.speed
this.rotateAngle = event.angle this.rotateAngle = event.angle
......
zh-cn/application-dev/reference/arkui-ts/ts-basic-gestures-tapgesture.md
浏览文件 @ 3bc24b2e
# TapGesture # TapGesture
> **说明：** > **说明：**
>
> 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。 > 从API Version 7开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
...@@ -16,15 +15,16 @@ TapGesture(options?: { count?: number, fingers?: number }) ...@@ -16,15 +15,16 @@ TapGesture(options?: { count?: number, fingers?: number })
**参数：** **参数：**
| 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名称 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ------ | ---- | ---- | ---------------------------------------- | | -------- | -------- | -------- | -------- | -------- |
| count | number | 否 | 1 | 识别的连续点击次数。如果设置小于1，会被转化为默认值。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;如配置多击，上一次抬起和下一次按下的超时时间为300毫秒（ms）。 | | count | number | 否 | 1 | 识别的连续点击次数。如果设置小于1，会被转化为默认值。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;如配置多击，上一次抬起和下一次按下的超时时间为300毫秒（ms）。 |
| fingers | number | 否 | 1 | 触发点击的最少手指数，最小为1指，&nbsp;最大为10指。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;1.&nbsp;当配置多指时，第一根手指按下后300毫秒（ms）内未有足够的手指数按下，手势识别失败。<br/>>&nbsp;<br/>>&nbsp;2.&nbsp;实际点击手指数超过配置值，手势识别失败。 | | fingers | number | 否 | 1 | 触发点击的最少手指数，最小为1指，&nbsp;最大为10指。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;1.&nbsp;当配置多指时，第一根手指按下后300毫秒（ms）内未有足够的手指数按下，手势识别失败。<br/>>&nbsp;2.&nbsp;实际点击手指数超过配置值，手势识别失败。 |
## 事件 ## 事件
| 名称 | 功能描述 | | 名称 | 功能描述 |
| ---------------------------------------- | ------------ | | -------- | -------- |
| onAction((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Tap手势识别成功回调。 | | onAction((event?:&nbsp;[GestureEvent](ts-gesture-settings.md))&nbsp;=&gt;&nbsp;void) | Tap手势识别成功回调。 |
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zh-cn/application-dev/reference/arkui-ts/ts-canvasrenderingcontext2d.md
浏览文件 @ 3bc24b2e
# CanvasRenderingContext2D对象 # CanvasRenderingContext2D对象
> **说明：** > ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> > 从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
> 从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
使用RenderingContext在Canvas组件上进行绘制，绘制对象可以是矩形、文本、图片等。 使用RenderingContext在Canvas组件上进行绘制，绘制对象可以是矩形、文本、图片等。
...@@ -12,51 +11,50 @@ ...@@ -12,51 +11,50 @@
CanvasRenderingContext2D(setting: RenderingContextSetting) CanvasRenderingContext2D(setting: RenderingContextSetting)
**参数：** **参数：**
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- | | ------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| setting | [RenderingContextSettings](#renderingcontextsettings) | 是 | - | 见[RenderingContextSettings](#renderingcontextsettings)。 | | setting | [RenderingContextSettings](#renderingcontextsettings) | 是 | - | 见[RenderingContextSettings](#renderingcontextsettings)。 |
### RenderingContextSettings ### RenderingContextSettings
RenderingContextSettings(antialias?: bool) RenderingContextSettings(antialias?: boolean)
用来配置CanvasRenderingContext2D对象的参数，包括是否开启抗锯齿。 用来配置CanvasRenderingContext2D对象的参数，包括是否开启抗锯齿。
**参数：** **参数：**
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| --------- | ---- | ---- | ----- | ---------------- | | 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| antialias | bool | 否 | false | 表明canvas是否开启抗锯齿。 | | --------- | ------- | ---- | ----- | ---------------- |
| antialias | boolean | 否 | false | 表明canvas是否开启抗锯齿。 |
## 属性 ## 属性
| 名称 | 类型 | 默认值 | 描述 | | 名称 | 类型 | 描述 |
| ---------------------------------------- | ---------------------------------------- | ---------------------------------------- | ---------------------------------------- | | ---------------------------------------- | ---------------------------------------- | ---------------------------------------- |
| [fillStyle](#fillstyle) | &lt;color&gt;&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | - | 指定绘制的填充色。<br/>-&nbsp;类型为&lt;color&gt;时，表示设置填充区域的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 | | [fillStyle](#fillstyle) | string&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | 指定绘制的填充色。<br/>-&nbsp;类型为string时，表示设置填充区域的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineWidth](#linewidth) | number | - | 设置绘制线条的宽度。 | | [lineWidth](#linewidth) | number | 设置绘制线条的宽度。 |
| [strokeStyle](#strokestyle) | &lt;color&gt;&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | - | 设置描边的颜色。<br/>-&nbsp;类型为&lt;color&gt;时，表示设置描边使用的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 | | [strokeStyle](#strokestyle) | string&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | 设置描边的颜色。<br/>-&nbsp;类型为string时，表示设置描边使用的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineCap](#linecap) | string | 'butt' | 指定线端点的样式，可选值为：<br/>-&nbsp;'butt'：线端点以方形结束。<br/>-&nbsp;'round'：线端点以圆形结束。<br/>-&nbsp;'square'：线端点以方形结束，该样式下会增加一个长度和线段厚度相同，宽度是线段厚度一半的矩形。 | | [lineCap](#linecap) | CanvasLineCap | 指定线端点的样式，可选值为：<br/>-&nbsp;'butt'：线端点以方形结束。<br/>-&nbsp;'round'：线端点以圆形结束。<br/>-&nbsp;'square'：线端点以方形结束，该样式下会增加一个长度和线段厚度相同，宽度是线段厚度一半的矩形。<br/>默认值：'butt'。 |
| [lineJoin](#linejoin) | string | 'miter' | 指定线段间相交的交点样式，可选值为：<br/>-&nbsp;'round'：在线段相连处绘制一个扇形，扇形的圆角半径是线段的宽度。<br/>-&nbsp;'bevel'：在线段相连处使用三角形为底填充，&nbsp;每个部分矩形拐角独立。<br/>-&nbsp;'miter'：在相连部分的外边缘处进行延伸，使其相交于一点，形成一个菱形区域，该属性可以通过设置miterLimit属性展现效果。 | | [lineJoin](#linejoin) | CanvasLineJoin | 指定线段间相交的交点样式，可选值为：<br/>-&nbsp;'round'：在线段相连处绘制一个扇形，扇形的圆角半径是线段的宽度。<br/>-&nbsp;'bevel'：在线段相连处使用三角形为底填充，&nbsp;每个部分矩形拐角独立。<br/>-&nbsp;'miter'：在相连部分的外边缘处进行延伸，使其相交于一点，形成一个菱形区域，该属性可以通过设置miterLimit属性展现效果。<br/>默认值：'miter'。 |
| [miterLimit](#miterlimit) | number | 10 | 设置斜接面限制值，该值指定了线条相交处内角和外角的距离。 | | [miterLimit](#miterlimit) | number | 设置斜接面限制值，该值指定了线条相交处内角和外角的距离。 <br/>默认值：10。 |
| [font](#font) | string | 'normal&nbsp;normal&nbsp;14px&nbsp;sans-serif' | 设置文本绘制中的字体样式。<br/>语法：ctx.font='font-size&nbsp;font-family'<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列。<br/>语法：ctx.font='font-style&nbsp;font-weight&nbsp;font-size&nbsp;font-family'<br/>-&nbsp;font-style(可选)，用于指定字体样式，支持如下几种样式：'normal',talic。<br/>-&nbsp;font-weight(可选)，用于指定字体的粗细，支持如下几种类型：'normal',&nbsp;'bold',&nbsp;'bolder',&nbsp;'lighter',&nbsp;100,&nbsp;200,&nbsp;300,&nbsp;400,&nbsp;500,&nbsp;600,&nbsp;700,&nbsp;800,&nbsp;900。<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列，支持如下几种类型：'sans-serif',&nbsp;'serif',&nbsp;'monospace'。 | | [font](#font) | string | 设置文本绘制中的字体样式。<br/>语法：ctx.font='font-size&nbsp;font-family'<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列。<br/>语法：ctx.font='font-style&nbsp;font-weight&nbsp;font-size&nbsp;font-family'<br/>-&nbsp;font-style(可选)，用于指定字体样式，支持如下几种样式：'normal','italic'。<br/>-&nbsp;font-weight(可选)，用于指定字体的粗细，支持如下几种类型：'normal',&nbsp;'bold',&nbsp;'bolder',&nbsp;'lighter',&nbsp;100,&nbsp;200,&nbsp;300,&nbsp;400,&nbsp;500,&nbsp;600,&nbsp;700,&nbsp;800,&nbsp;900。<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列，支持如下几种类型：'sans-serif',&nbsp;'serif',&nbsp;'monospace'。<br/>默认值：'normal normal 14px sans-serif'。 |
| [textAlign](#textalign) | string | 'left' | 设置文本绘制中的文本对齐方式，可选值为：<br/>-&nbsp;'left'：文本左对齐。<br/>-&nbsp;'right'：文本右对齐。<br/>-&nbsp;'center'：文本居中对齐。<br/>-&nbsp;'start'：文本对齐界线开始的地方。<br/>-&nbsp;'end'：文本对齐界线结束的地方。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;ltr布局模式下'start'和'left'一致，rtl布局模式下'start'和'right'一致·。 | | [textAlign](#textalign) | CanvasTextAlign | 设置文本绘制中的文本对齐方式，可选值为：<br/>-&nbsp;'left'：文本左对齐。<br/>-&nbsp;'right'：文本右对齐。<br/>-&nbsp;'center'：文本居中对齐。<br/>-&nbsp;'start'：文本对齐界线开始的地方。<br/>-&nbsp;'end'：文本对齐界线结束的地方。<br/>>&nbsp;![icon-note.gif](public_sys-resources/icon-note.gif)&nbsp;**说明：**<br/>>&nbsp;ltr布局模式下'start'和'left'一致，rtl布局模式下'start'和'right'一致·。<br/>默认值：'left'。 |
| [textBaseline](#textbaseline) | string | 'alphabetic' | 设置文本绘制中的水平对齐方式，可选值为：<br/>-&nbsp;'alphabetic'：文本基线是标准的字母基线。<br/>-&nbsp;'top'：文本基线在文本块的顶部。<br/>-&nbsp;'hanging'：文本基线是悬挂基线。<br/>-&nbsp;'middle'：文本基线在文本块的中间。<br/>-&nbsp;'ideographic'：文字基线是表意字基线；如果字符本身超出了alphabetic基线，那么ideograhpic基线位置在字符本身的底部。<br/>-&nbsp;'bottom'：文本基线在文本块的底部。&nbsp;与ideographic基线的区别在于ideographic基线不需要考虑下行字母。 | | [textBaseline](#textbaseline) | CanvasTextBaseline | 设置文本绘制中的水平对齐方式，可选值为：<br/>-&nbsp;'alphabetic'：文本基线是标准的字母基线。<br/>-&nbsp;'top'：文本基线在文本块的顶部。<br/>-&nbsp;'hanging'：文本基线是悬挂基线。<br/>-&nbsp;'middle'：文本基线在文本块的中间。<br/>-&nbsp;'ideographic'：文字基线是表意字基线；如果字符本身超出了alphabetic基线，那么ideograhpic基线位置在字符本身的底部。<br/>-&nbsp;'bottom'：文本基线在文本块的底部。&nbsp;与ideographic基线的区别在于ideographic基线不需要考虑下行字母。<br/>默认值：'alphabetic'。 |
| [globalAlpha](#globalalpha) | number | - | 设置透明度，0.0为完全透明，1.0为完全不透明。 | | [globalAlpha](#globalalpha) | number | 设置透明度，0.0为完全透明，1.0为完全不透明。 |
| [lineDashOffset](#linedashoffset) | number | 0.0 | 设置画布的虚线偏移量，精度为float。 | | [lineDashOffset](#linedashoffset) | number | 设置画布的虚线偏移量，精度为float。 <br/>默认值：0.0。 |
| [globalCompositeOperation](#globalcompositeoperation) | string | 'source-over' | 设置合成操作的方式。类型字段可选值有'source-over'，'source-atop'，'source-in'，'source-out'，'destination-over'，'destination-atop'，'destination-in'，'destination-out'，'lighter'，'copy'，'xor'。 | | [globalCompositeOperation](#globalcompositeoperation) | string | 设置合成操作的方式。类型字段可选值有'source-over'，'source-atop'，'source-in'，'source-out'，'destination-over'，'destination-atop'，'destination-in'，'destination-out'，'lighter'，'copy'，'xor'。<br/>默认值：'source-over'。 |
| [shadowBlur](#shadowblur) | number | 0.0 | 设置绘制阴影时的模糊级别，值越大越模糊，精度为float。 | | [shadowBlur](#shadowblur) | number | 设置绘制阴影时的模糊级别，值越大越模糊，精度为float。 <br/>默认值：0.0。 |
| [shadowColor](#shadowcolor) | &lt;color&gt; | - | 设置绘制阴影时的阴影颜色。 | | [shadowColor](#shadowcolor) | string | 设置绘制阴影时的阴影颜色。 |
| [shadowOffsetX](#shadowoffsetx) | number | - | 设置绘制阴影时和原有对象的水平偏移值。 | | [shadowOffsetX](#shadowoffsetx) | number | 设置绘制阴影时和原有对象的水平偏移值。 |
| [shadowOffsetY](#shadowoffsety) | number | - | 设置绘制阴影时和原有对象的垂直偏移值。 | | [shadowOffsetY](#shadowoffsety) | number | 设置绘制阴影时和原有对象的垂直偏移值。 |
| [imageSmoothingEnabled](#imagesmoothingenabled) | boolean | true | 用于设置绘制图片时是否进行图像平滑度调整，true为启用，false为不启用。 | | [imageSmoothingEnabled](#imagesmoothingenabled) | boolean | 用于设置绘制图片时是否进行图像平滑度调整，true为启用，false为不启用。 <br/>默认值：true。 |
| imageSmoothingQuality | string | 'low' | 用于设置图像平滑度，支持如下三种类型：'low',&nbsp;'medium',&nbsp;'high'。 |
> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> **说明：** >fillStyle、shadowColor与 strokeStyle 中string类型格式为 'rgb(255, 255, 255)'，'rgba(255, 255, 255, 1.0)'，'\#FFFFFF'。
>
> &lt;color&gt;类型格式为 'rgb(255, 255, 255)'，'rgba(255, 255, 255, 1.0)'，'\#FFFFFF'。
### fillStyle ### fillStyle
...@@ -427,6 +425,7 @@ struct LineDashOffset { ...@@ -427,6 +425,7 @@ struct LineDashOffset {
.onReady(() =>{ .onReady(() =>{
this.context.arc(100, 75, 50, 0, 6.28) this.context.arc(100, 75, 50, 0, 6.28)
this.context.setLineDash([10,20]) this.context.setLineDash([10,20])
this.context.lineDashOffset = 10.0;
this.context.stroke(); this.context.stroke();
}) })
} }
...@@ -597,6 +596,7 @@ struct ShadowOffsetX { ...@@ -597,6 +596,7 @@ struct ShadowOffsetX {
struct ShadowOffsetY { struct ShadowOffsetY {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -660,16 +660,19 @@ fillRect(x: number, y: number, w: number, h: number): void ...@@ -660,16 +660,19 @@ fillRect(x: number, y: number, w: number, h: number): void
填充一个矩形。 填充一个矩形。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形左上角点的x坐标。 |
| y | number | 是 | 0 | 指定矩形左上角点的y坐标。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 说明 |
``` | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形左上角点的x坐标。 |
| y | number | 是 | 0 | 指定矩形左上角点的y坐标。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct FillRect { struct FillRect {
...@@ -701,21 +704,25 @@ strokeRect(x: number, y: number, w: number, h: number): void ...@@ -701,21 +704,25 @@ strokeRect(x: number, y: number, w: number, h: number): void
绘制具有边框的矩形，矩形内部不填充。 绘制具有边框的矩形，矩形内部不填充。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------ | ------ | ---- | ---- | ------------ |
| x | number | 是 | 0 | 指定矩形的左上角x坐标。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 说明 |
``` | ------ | ------ | ---- | ---- | ------------ |
| x | number | 是 | 0 | 指定矩形的左上角x坐标。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标。 |
| w | number | 是 | 0 | 指定矩形的宽度。 |
| h | number | 是 | 0 | 指定矩形的高度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct StrokeRect { struct StrokeRect {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -741,21 +748,25 @@ clearRect(x: number, y: number, w: number, h: number): void ...@@ -741,21 +748,25 @@ clearRect(x: number, y: number, w: number, h: number): void
删除指定区域内的绘制内容。 删除指定区域内的绘制内容。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形上的左上角x坐标。 |
| y | number | 是 | 0 | 指定矩形上的左上角y坐标。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形上的左上角x坐标。 |
| y | number | 是 | 0 | 指定矩形上的左上角y坐标。 |
| w | number | 是 | 0 | 指定矩形的宽度。 |
| h | number | 是 | 0 | 指定矩形的高度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ClearRect { struct ClearRect {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -779,24 +790,29 @@ clearRect(x: number, y: number, w: number, h: number): void ...@@ -779,24 +790,29 @@ clearRect(x: number, y: number, w: number, h: number): void
### fillText ### fillText
fillText(text: string, x: number, y: number): void fillText(text: string, x: number, y: number, maxWidth?: number): void
绘制填充类文本。 绘制填充类文本。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 说明 |
``` | ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
| maxWidth | number | 否 | - | 指定文本允许的最大宽度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct FillText { struct FillText {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -819,24 +835,29 @@ fillText(text: string, x: number, y: number): void ...@@ -819,24 +835,29 @@ fillText(text: string, x: number, y: number): void
### strokeText ### strokeText
strokeText(text: string, x: number, y: number): void strokeText(text: string, x: number, y: number, maxWidth?:number): void
绘制描边类文本。 绘制描边类文本。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
| maxWidth | number | 否 | - | 需要绘制的文本的最大宽度 。|
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct StrokeText { struct StrokeText {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -863,28 +884,49 @@ measureText(text: string): TextMetrics ...@@ -863,28 +884,49 @@ measureText(text: string): TextMetrics
该方法返回一个文本测算的对象，通过该对象可以获取指定文本的宽度值。 该方法返回一个文本测算的对象，通过该对象可以获取指定文本的宽度值。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | ---------- | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| text | string | 是 | "" | 需要进行测量的文本。 | | ---- | ------ | ---- | ---- | ---------- |
| text | string | 是 | "" | 需要进行测量的文本。 |
**返回值：**
- 返回值
| 类型 | 说明 | | 类型 | 说明 |
| ----------- | ------- | | ----------- | ------- |
| TextMetrics | 文本的尺寸信息 | | TextMetrics | 文本的尺寸信息 |
- TextMetrics类型描述 **TextMetrics类型描述:**
| 属性 | 类型 | 描述 |
| ----- | ------ | ------- | | 属性 | 类型 | 描述 |
| width | number | 字符串的宽度。 | | ----- | ------ | ------- |
| width | number | 字符串的宽度。 |
| height | number | 字符串的高度。 |
| actualBoundingBoxAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的矩形边界顶部的距离，当前值为0。 |
| actualBoundingBoxDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的矩形边界底部的距离，当前值为0。 |
| actualBoundingBoxLeft | number | 平行于基线，从CanvasRenderingContext2D.textAlign 属性确定的对齐点到文本矩形边界左侧的距离，当前值为0。 |
| actualBoundingBoxRight | number | 平行于基线，从CanvasRenderingContext2D.textAlign 属性确定的对齐点到文本矩形边界右侧的距离，当前值为0。|
| alphabeticBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 alphabetic 基线的距离，当前值为0。|
| emHeightAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框中 em 方块顶部的距离，当前值为0。|
| emHeightDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框中 em 方块底部的距离，当前值为0。|
| fontBoundingBoxAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的所有字体的矩形最高边界顶部的距离，当前值为0。|
| fontBoundingBoxDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的所有字体的矩形边界最底部的距离，当前值为0。|
| hangingBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 hanging 基线的距离，当前值为0。|
| ideographicBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 ideographic 基线的距离，当前值为0。|
**示例：**
```
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct MeasureText { struct MeasureText {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -912,19 +954,22 @@ stroke(path?: Path2D): void ...@@ -912,19 +954,22 @@ stroke(path?: Path2D): void
进行边框绘制操作。 进行边框绘制操作。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ---------------------------------------- | ---- | ---- | ------------ |
| path | [Path2D](ts-components-canvas-path2d.md) | 否 | null | 需要绘制的Path2D。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ---------------------------------------- | ---- | ---- | ------------ |
| path | [Path2D](ts-components-canvas-path2d.md) | 否 | null | 需要绘制的Path2D。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Stroke { struct Stroke {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -953,14 +998,16 @@ beginPath(): void ...@@ -953,14 +998,16 @@ beginPath(): void
创建一个新的绘制路径。 创建一个新的绘制路径。
**示例：** **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct BeginPath { struct BeginPath {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -991,20 +1038,23 @@ moveTo(x: number, y: number): void ...@@ -991,20 +1038,23 @@ moveTo(x: number, y: number): void
路径从当前点移动到指定点。 路径从当前点移动到指定点。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 说明 |
``` | ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct MoveTo { struct MoveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1033,20 +1083,23 @@ lineTo(x: number, y: number): void ...@@ -1033,20 +1083,23 @@ lineTo(x: number, y: number): void
从当前点到指定点进行路径连接。 从当前点到指定点进行路径连接。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct LineTo { struct LineTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1075,14 +1128,16 @@ closePath(): void ...@@ -1075,14 +1128,16 @@ closePath(): void
结束当前路径形成一个封闭路径。 结束当前路径形成一个封闭路径。
**示例：** **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ClosePath { struct ClosePath {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1109,25 +1164,34 @@ closePath(): void ...@@ -1109,25 +1164,34 @@ closePath(): void
### createPattern ### createPattern
createPattern(image: ImageBitmap, repetition: string): void createPattern(image: ImageBitmap, repetition: string | null): CanvasPattern | null
通过指定图像和重复方式创建图片填充的模板。 通过指定图像和重复方式创建图片填充的模板。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md) | 是 | null | 图源对象，具体参考ImageBitmap对象。 |
| repetition | string | 是 | “” | 设置图像重复的方式，取值为：'repeat'、'repeat-x'、&nbsp;'repeat-y'、'no-repeat'。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md) | 是 | null | 图源对象，具体参考ImageBitmap对象。 |
| repetition | string | 是 | “” | 设置图像重复的方式，取值为：'repeat'、'repeat-x'、&nbsp;'repeat-y'、'no-repeat'。 |
**返回值：**：
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [CanvasPattern](#canvaspattern) | 通过指定图像和重复方式创建图片填充的模板对象。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreatePattern { struct CreatePattern {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private img:ImageBitmap = new ImageBitmap("common/images/icon.jpg") private img:ImageBitmap = new ImageBitmap("common/images/icon.jpg")
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1155,24 +1219,27 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, ...@@ -1155,24 +1219,27 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number,
创建三次贝赛尔曲线的路径。 创建三次贝赛尔曲线的路径。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------------- |
| cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 |
| cp1y | number | 是 | 0 | 第一个贝塞尔参数的y坐标值。 |
| cp2x | number | 是 | 0 | 第二个贝塞尔参数的x坐标值。 |
| cp2y | number | 是 | 0 | 第二个贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | -------------- |
| cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 |
| cp1y | number | 是 | 0 | 第一个贝塞尔参数的y坐标值。 |
| cp2x | number | 是 | 0 | 第二个贝塞尔参数的x坐标值。 |
| cp2y | number | 是 | 0 | 第二个贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct BezierCurveTo { struct BezierCurveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1201,21 +1268,25 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void ...@@ -1201,21 +1268,25 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
创建二次贝赛尔曲线的路径。 创建二次贝赛尔曲线的路径。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------- |
| cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 |
| cpy | number | 是 | 0 | 贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | ----------- |
| cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 |
| cpy | number | 是 | 0 | 贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct QuadraticCurveTo { struct QuadraticCurveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true); private settings: RenderingContextSettings = new RenderingContextSettings(true);
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings); private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings);
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1240,28 +1311,31 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void ...@@ -1240,28 +1311,31 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
### arc ### arc
arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, counterclockwise?: boolean): void
绘制弧线路径。 绘制弧线路径。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------------- | ------- | ---- | ----- | ---------- |
| x | number | 是 | 0 | 弧线圆心的x坐标值。 |
| y | number | 是 | 0 | 弧线圆心的y坐标值。 |
| radius | number | 是 | 0 | 弧线的圆半径。 |
| startAngle | number | 是 | 0 | 弧线的起始弧度。 |
| endAngle | number | 是 | 0 | 弧线的终止弧度。 |
| anticlockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ------------- | ------- | ---- | ----- | ---------- |
| x | number | 是 | 0 | 弧线圆心的x坐标值。 |
| y | number | 是 | 0 | 弧线圆心的y坐标值。 |
| radius | number | 是 | 0 | 弧线的圆半径。 |
| startAngle | number | 是 | 0 | 弧线的起始弧度。 |
| endAngle | number | 是 | 0 | 弧线的终止弧度。 |
| counterclockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Arc { struct Arc {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1289,23 +1363,26 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -1289,23 +1363,26 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
依据圆弧经过的点和圆弧半径创建圆弧路径。 依据圆弧经过的点和圆弧半径创建圆弧路径。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | --------------- |
| x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 |
| y1 | number | 是 | 0 | 圆弧经过的第一个点的y坐标值。 |
| x2 | number | 是 | 0 | 圆弧经过的第二个点的x坐标值。 |
| y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 |
| radius | number | 是 | 0 | 圆弧的圆半径值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ------ | ------ | ---- | ---- | --------------- |
| x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 |
| y1 | number | 是 | 0 | 圆弧经过的第一个点的y坐标值。 |
| x2 | number | 是 | 0 | 圆弧经过的第二个点的x坐标值。 |
| y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 |
| radius | number | 是 | 0 | 圆弧的圆半径值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ArcTo { struct ArcTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1329,31 +1406,33 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -1329,31 +1406,33 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
### ellipse ### ellipse
ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, counterclockwise?: boolean): void
在规定的矩形区域绘制一个椭圆。 在规定的矩形区域绘制一个椭圆。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------------- | ------- | ---- | ----- | ----------------- |
| x | number | 是 | 0 | 椭圆圆心的x轴坐标。 |
| y | number | 是 | 0 | 椭圆圆心的y轴坐标。 |
| radiusX | number | 是 | 0 | 椭圆x轴的半径长度。 |
| radiusY | number | 是 | 0 | 椭圆y轴的半径长度。 |
| rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 |
| startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 |
| endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 |
| anticlockwise | boolean | 否 | false | 是否以逆时针方向绘制椭圆。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------------- | ------- | ---- | ----- | ----------------- |
| x | number | 是 | 0 | 椭圆圆心的x轴坐标。 |
| y | number | 是 | 0 | 椭圆圆心的y轴坐标。 |
| radiusX | number | 是 | 0 | 椭圆x轴的半径长度。 |
| radiusY | number | 是 | 0 | 椭圆y轴的半径长度。 |
| rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 |
| startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 |
| endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 |
| counterclockwise | boolean | 否 | false | 是否以逆时针方向绘制椭圆。 |
``` **示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1377,26 +1456,29 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number ...@@ -1377,26 +1456,29 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number
### rect ### rect
rect(x: number, y: number, width: number, height: number): void rect(x: number, y: number, w: number, h: number): void
创建矩形路径。 创建矩形路径。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形的左上角x坐标值。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标值。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形的左上角x坐标值。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标值。 |
| w | number | 是 | 0 | 指定矩形的宽度。 |
| h | number | 是 | 0 | 指定矩形的高度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1419,12 +1501,21 @@ rect(x: number, y: number, width: number, height: number): void ...@@ -1419,12 +1501,21 @@ rect(x: number, y: number, width: number, height: number): void
### fill ### fill
fill(): void fill(fillRule?: CanvasFillRule): void
对封闭路径进行填充。 对封闭路径进行填充。
**示例：** **参数:**
```
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| fillRule | CanvasFillRule | 否 | "nonzero" | 指定要填充对象的规则。<br/>可选参数为："nonzero", "evenodd"。|
**示例:**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Fill { struct Fill {
...@@ -1451,14 +1542,73 @@ fill(): void ...@@ -1451,14 +1542,73 @@ fill(): void
![zh-cn_image_0000001238952381](figures/zh-cn_image_0000001238952381.png) ![zh-cn_image_0000001238952381](figures/zh-cn_image_0000001238952381.png)
fill(path: Path2D, fillRule?: CanvasFillRule): void
对封闭路径进行填充。
**参数:**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| path | Path2D | 是 | | Path2D填充路径。 |
| fillRule | CanvasFillRule | 否 | "nonzero" | 指定要填充对象的规则。<br/>可选参数为："nonzero", "evenodd"。|
**示例:**
```ts
// xxx.ets
@Entry
@Component
struct Fill {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
let region = new Path2D();
region.moveTo(30, 90);
region.lineTo(110, 20);
region.lineTo(240, 130);
region.lineTo(60, 130);
region.lineTo(190, 20);
region.lineTo(270, 90);
region.closePath();
// Fill path
this.context.fillStyle = 'green';
this.context.fill(region, "evenodd");
})
}
.width('100%')
.height('100%')
}
}
```
![zh-cn_image_000000127777774](figures/zh-cn_image_000000127777774.png)
### clip ### clip
clip(): void clip(fillRule?: CanvasFillRule): void
设置当前路径为剪切路径。 设置当前路径为剪切路径。
**示例：** **参数:**
```
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| fillRule | CanvasFillRule | 否 | "nonzero" | 指定要剪切对象的规则。<br/>可选参数为："nonzero", "evenodd"。|
**示例:**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Clip { struct Clip {
...@@ -1488,25 +1638,75 @@ clip(): void ...@@ -1488,25 +1638,75 @@ clip(): void
![zh-cn_image_0000001194032462](figures/zh-cn_image_0000001194032462.png) ![zh-cn_image_0000001194032462](figures/zh-cn_image_0000001194032462.png)
clip(path: Path2D, fillRule?: CanvasFillRule): void
对封闭路径进行填充。该接口为空接口。
**参数:**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| path | Path2D | 是 | - | Path2D剪切路径。 |
| fillRule | CanvasFillRule | 否 | "nonzero" | 指定要剪切对象的规则。<br/>可选参数为："nonzero", "evenodd"。|
### filter
filter(filter: string): void
为Canvas图形设置各类滤镜效果。该接口为空接口。
**参数:**
| 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------ | ------ | ---- | ---- | ------------- |
| filter | string | 是 | - | 接受各类滤镜效果的函数。|
### getTransform
getTransform(): Matrix2D
获取当前被应用到上下文的转换矩阵。该接口为空接口。
### resetTransform
resetTransform(): void
使用单位矩阵重新设置当前变形。该接口为空接口。
### direction
direction(direction: CanvasDirection): void
绘制文本时，描述当前文本方向的属性。该接口为空接口。
### rotate ### rotate
rotate(rotate: number): void rotate(angle: number): void
针对当前坐标轴进行顺时针旋转。 针对当前坐标轴进行顺时针旋转。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ---------------------------------------- |
| rotate | number | 是 | 0 | 设置顺时针旋转的弧度值，可以通过Math.PI&nbsp;/&nbsp;180将角度转换为弧度值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ------ | ------ | ---- | ---- | ---------------------------------------- |
| angle | number | 是 | 0 | 设置顺时针旋转的弧度值，可以通过Math.PI&nbsp;/&nbsp;180将角度转换为弧度值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Rotate { struct Rotate {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1533,20 +1733,23 @@ scale(x: number, y: number): void ...@@ -1533,20 +1733,23 @@ scale(x: number, y: number): void
设置canvas画布的缩放变换属性，后续的绘制操作将按照缩放比例进行缩放。 设置canvas画布的缩放变换属性，后续的绘制操作将按照缩放比例进行缩放。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------- |
| x | number | 是 | 0 | 设置水平方向的缩放值。 |
| y | number | 是 | 0 | 设置垂直方向的缩放值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | ----------- |
| x | number | 是 | 0 | 设置水平方向的缩放值。 |
| y | number | 是 | 0 | 设置垂直方向的缩放值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Scale { struct Scale {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1570,35 +1773,38 @@ scale(x: number, y: number): void ...@@ -1570,35 +1773,38 @@ scale(x: number, y: number): void
### transform ### transform
transform(scaleX: number, skewX: number, skewY: number, scaleY: number, translateX: number, translateY: number): void transform(a: number, b: number, c: number, d: number, e: number, f: number): void
transform方法对应一个变换矩阵，想对一个图形进行变化的时候，只要设置此变换矩阵相应的参数，对图形的各个定点的坐标分别乘以这个矩阵，就能得到新的定点的坐标。矩阵变换效果可叠加。 transform方法对应一个变换矩阵，想对一个图形进行变化的时候，只要设置此变换矩阵相应的参数，对图形的各个定点的坐标分别乘以这个矩阵，就能得到新的定点的坐标。矩阵变换效果可叠加。
> **说明：** > ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> 变换后的坐标计算方式（x和y为变换前坐标，x'和y'为变换后坐标）： > 变换后的坐标计算方式（x和y为变换前坐标，x'和y'为变换后坐标）：
> >
> - x' = scaleX \* x + skewY \* y + translateX > - x' = scaleX \* x + skewY \* y + translateX
> >
> - y' = skewX \* x + scaleY \* y + translateY > - y' = skewX \* x + scaleY \* y + translateY
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ------ | ---- | ---- | -------- |
| scaleX | number | 是 | 0 | 指定水平缩放值。 |
| skewX | number | 是 | 0 | 指定水平倾斜值。 |
| skewY | number | 是 | 0 | 指定垂直倾斜值。 |
| scaleY | number | 是 | 0 | 指定垂直缩放值。 |
| translateX | number | 是 | 0 | 指定水平移动值。 |
| translateY | number | 是 | 0 | 指定垂直移动值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---------- | ------ | ---- | ---- | -------- |
| a | number | 是 | 0 |scaleX: 指定水平缩放值。 |
| b | number | 是 | 0 |skewX: 指定水平倾斜值。 |
| c | number | 是 | 0 |skewY: 指定垂直倾斜值。 |
| d | number | 是 | 0 |scaleY: 指定垂直缩放值。 |
| e | number | 是 | 0 |translateX: 指定水平移动值。 |
| f | number | 是 | 0 |translateY: 指定垂直移动值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Transform { struct Transform {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1627,28 +1833,31 @@ transform方法对应一个变换矩阵，想对一个图形进行变化的时 ...@@ -1627,28 +1833,31 @@ transform方法对应一个变换矩阵，想对一个图形进行变化的时
### setTransform ### setTransform
setTransform(scaleX: number, skewX: number, skewY: number, scale: number, translateX: number, translateY: number): void setTransform(a: number, b: number, c: number, d: number, e: number, f: number): void
setTransfrom方法使用的参数和transform()方法相同，但setTransform()方法会重置现有的变换矩阵并创建新的变换矩阵。 setTransfrom方法使用的参数和transform()方法相同，但setTransform()方法会重置现有的变换矩阵并创建新的变换矩阵。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ------ | ---- | ---- | -------- |
| scaleX | number | 是 | 0 | 指定水平缩放值。 |
| skewX | number | 是 | 0 | 指定水平倾斜值。 |
| skewY | number | 是 | 0 | 指定垂直倾斜值。 |
| scaleY | number | 是 | 0 | 指定垂直缩放值。 |
| translateX | number | 是 | 0 | 指定水平移动值。 |
| translateY | number | 是 | 0 | 指定垂直移动值。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---------- | ------ | ---- | ---- | -------- |
| a | number | 是 | 0 |scaleX: 指定水平缩放值。 |
| b | number | 是 | 0 |skewX: 指定水平倾斜值。 |
| c | number | 是 | 0 |skewY: 指定垂直倾斜值。 |
| d | number | 是 | 0 |scaleY: 指定垂直缩放值。 |
| e | number | 是 | 0 |translateX: 指定水平移动值。 |
| f | number | 是 | 0 |translateY: 指定垂直移动值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct SetTransform { struct SetTransform {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1672,26 +1881,34 @@ setTransfrom方法使用的参数和transform()方法相同，但setTransform() ...@@ -1672,26 +1881,34 @@ setTransfrom方法使用的参数和transform()方法相同，但setTransform()
![zh-cn_image_0000001238712421](figures/zh-cn_image_0000001238712421.png) ![zh-cn_image_0000001238712421](figures/zh-cn_image_0000001238712421.png)
setTransform(transform?: Matrix2D): void
以Matrix2D对象为模板重置现有的变换矩阵并创建新的变换矩阵。该接口为空接口。
### translate ### translate
translate(x: number, y: number): void translate(x: number, y: number): void
移动当前坐标系的原点。 移动当前坐标系的原点。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------- |
| x | number | 是 | 0 | 设置水平平移量。 |
| y | number | 是 | 0 | 设置竖直平移量。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | -------- |
| x | number | 是 | 0 | 设置水平平移量。 |
| y | number | 是 | 0 | 设置竖直平移量。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Translate { struct Translate {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1717,34 +1934,38 @@ translate(x: number, y: number): void ...@@ -1717,34 +1934,38 @@ translate(x: number, y: number): void
drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number): void drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number): void
drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number, dWidth: number, dHeight: number): void drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number, dw: number, dh: number): void
drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number, sHeight: number, dx: number, dy: number, dWidth: number, dHeight: number):void drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sw: number, sh: number, dx: number, dy: number, dw: number, dh: number):void
进行图像绘制。 进行图像绘制。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md)或[PixelMap](../apis/js-apis-image.md#pixelmap7) | 是 | null | 图片资源，请参考ImageBitmap或PixelMap。 |
| sx | number | 否 | 0 | 裁切源图像时距离源图像左上角的x坐标值。 |
| sy | number | 否 | 0 | 裁切源图像时距离源图像左上角的y坐标值。 |
| sWidth | number | 否 | 0 | 裁切源图像时需要裁切的宽度。 |
| sHeight | number | 否 | 0 | 裁切源图像时需要裁切的高度。 |
| dx | number | 是 | 0 | 绘制区域左上角在x轴的位置。 |
| dy | number | 是 | 0 | 绘制区域左上角在y&nbsp;轴的位置。 |
| dWidth | number | 否 | 0 | 绘制区域的宽度。 当绘制区域的宽度和裁剪图像的宽度不一致时，将图像宽度拉伸或压缩为绘制区域的宽度。 |
| dHeight | number | 否 | 0 | 绘制区域的高度。 当绘制区域的高度和裁剪图像的高度不一致时，将图像高度拉伸或压缩为绘制区域的高度。 |
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md)或[PixelMap](../apis/js-apis-image.md#pixelmap7) | 是 | null | 图片资源，请参考ImageBitmap或PixelMap。 |
| sx | number | 否 | 0 | 裁切源图像时距离源图像左上角的x坐标值。 |
| sy | number | 否 | 0 | 裁切源图像时距离源图像左上角的y坐标值。 |
| sw | number | 否 | 0 | 裁切源图像时需要裁切的宽度。 |
| sh | number | 否 | 0 | 裁切源图像时需要裁切的高度。 |
| dx | number | 是 | 0 | 绘制区域左上角在x轴的位置。 |
| dy | number | 是 | 0 | 绘制区域左上角在y&nbsp;轴的位置。 |
| dw | number | 否 | 0 | 绘制区域的宽度。当绘制区域的宽度和裁剪图像的宽度不一致时，将图像宽度拉伸或压缩为绘制区域的宽度。 |
| dh | number | 否 | 0 | 绘制区域的高度。当绘制区域的高度和裁剪图像的高度不一致时，将图像高度拉伸或压缩为绘制区域的高度。 |
**示例：**
``` **示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ImageExample { struct ImageExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true); private settings: RenderingContextSettings = new RenderingContextSettings(true);
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings); private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings);
private img:ImageBitmap = new ImageBitmap("common/images/example.jpg"); private img:ImageBitmap = new ImageBitmap("common/images/example.jpg");
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1766,79 +1987,257 @@ drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number, ...@@ -1766,79 +1987,257 @@ drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number,
### createImageData ### createImageData
createImageData(width: number, height: number): Object createImageData(sw: number, sh: number): ImageData
创建新的ImageData 对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。 创建新的ImageData 对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认 | 描述 |
| ------ | ------ | ---- | ---- | ------------- | | 参数 | 类型 | 必填 | 默认 | 描述 |
| width | number | 是 | 0 | ImageData的宽度。 | | ------ | ------ | ---- | ---- | ------------- |
| height | number | 是 | 0 | ImageData的高度。 | | sw | number | 是 | 0 | ImageData的宽度。 |
| sh | number | 是 | 0 | ImageData的高度。 |
### createImageData ### createImageData
createImageData(imageData: Object): Object createImageData(imageData: ImageData): ImageData
创建新的ImageData 对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。 创建新的ImageData 对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认 | 描述 |
| --------- | ------ | ---- | ---- | ----------------- | | 参数 | 类型 | 必填 | 默认 | 描述 |
| imagedata | Object | 是 | null | 复制现有的ImageData对象。 | | --------- | ------ | ---- | ---- | ----------------- |
| imagedata | [ImageData](ts-components-canvas-imagebitmap.md)| 是 | null | 复制现有的ImageData对象。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [ImageData](ts-components-canvas-imagebitmap.md) | 新的ImageData对象。|
### getPixelMap ### getPixelMap
getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap
以当前canvas指定区域内的像素创建[PixelMap](../apis/js-apis-image.md#pixelmap7)对象。 以当前canvas指定区域内的像素创建[PixelMap](../apis/js-apis-image.md#pixelmap7)对象。
**参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | **参数：**
| ---- | ------ | ---- | ---- | --------------- |
| sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| sy | number | 是 | 0 | 需要输出的区域的左上角y坐标。 | | ---- | ------ | ---- | ---- | --------------- |
| sw | number | 是 | 0 | 需要输出的区域的宽度。 | | sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 | | sy | number | 是 | 0 | 需要输出的区域的左上角y坐标。 |
| sw | number | 是 | 0 | 需要输出的区域的宽度。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [PixelMap](../apis/js-apis-image.md#pixelmap7) | 新的PixelMap对象。 |
### getImageData ### getImageData
getImageData(sx: number, sy: number, sw: number, sh: number): Object getImageData(sx: number, sy: number, sw: number, sh: number): ImageData
以当前canvas指定区域内的像素创建[ImageData](ts-components-canvas-imagebitmap.md)对象。 以当前canvas指定区域内的像素创建[ImageData](ts-components-canvas-imagebitmap.md)对象。
**参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | **参数：**
| ---- | ------ | ---- | ---- | --------------- |
| sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| sy | number | 是 | 0 | 需要输出的区域的左上角y坐标。 | | ---- | ------ | ---- | ---- | --------------- |
| sw | number | 是 | 0 | 需要输出的区域的宽度。 | | sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 | | sy | number | 是 | 0 | 需要输出的区域的左上角y坐标。 |
| sw | number | 是 | 0 | 需要输出的区域的宽度。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [ImageData](ts-components-canvas-imagebitmap.md) | 新的ImageData对象。 |
### putImageData ### putImageData
putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void putImageData(imageData: ImageData, dx: number, dy: number): void
putImageData(imageData: ImageData, dx: number, dy: number, dirtyX: number, dirtyY: number, dirtyWidth: number, dirtyHeight: number): void
使用[ImageData](ts-components-canvas-imagebitmap.md)数据填充新的矩形区域。 使用[ImageData](ts-components-canvas-imagebitmap.md)数据填充新的矩形区域。
**参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ----------- | ------ | ---- | ------------ | ----------------------------- |
| imagedata | [ImageData](ts-components-canvas-imagebitmap.md) | 是 | null | 包含像素值的ImageData对象。 |
| dx | number | 是 | 0 | 填充区域在x轴方向的偏移量。 |
| dy | number | 是 | 0 | 填充区域在y轴方向的偏移量。 |
| dirtyX | number | 否 | 0 | 源图像数据矩形裁切范围左上角距离源图像左上角的x轴偏移量。 |
| dirtyY | number | 否 | 0 | 源图像数据矩形裁切范围左上角距离源图像左上角的y轴偏移量。 |
| dirtyWidth | number | 否 | imagedata的宽度 | 源图像数据矩形裁切范围的宽度。 |
| dirtyHeight | number | 否 | imagedata的高度 | 源图像数据矩形裁切范围的高度。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct PutImageData {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
var imageData = this.context.createImageData(100, 100)
for (var i = 0; i < imageData.data.length; i += 4) {
imageData.data[i + 0] = 255
imageData.data[i + 1] = 0
imageData.data[i + 2] = 255
imageData.data[i + 3] = 255
}
this.context.putImageData(imageData, 10, 10)
})
}
.width('100%')
.height('100%')
}
}
```
![zh-cn_image_0000001238952387](figures/zh-cn_image_0000001238952387.png)
### setLineDash
setLineDash(segments: number[]): void
设置画布的虚线样式。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ----------- | ------ | ---- | ------------ | ----------------------------- | | 参数 | 类型 | 描述 |
| imagedata | Object | 是 | null | 包含像素值的ImageData对象。 | | -------- | ----- | -------------------- |
| dx | number | 是 | 0 | 填充区域在x轴方向的偏移量。 | | segments | number[] | 描述线段如何交替和线段间距长度的数组。 |
| dy | number | 是 | 0 | 填充区域在y轴方向的偏移量。 |
| dirtyX | number | 否 | 0 | 源图像数据矩形裁切范围左上角距离源图像左上角的x轴偏移量。 | **示例：**
| dirtyY | number | 否 | 0 | 源图像数据矩形裁切范围左上角距离源图像左上角的y轴偏移量。 |
| dirtyWidth | number | 否 | imagedata的宽度 | 源图像数据矩形裁切范围的宽度。 | ```ts
| dirtyHeight | number | 否 | imagedata的高度 | 源图像数据矩形裁切范围的高度。 | // xxx.ets
@Entry
@Component
struct SetLineDash {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
this.context.arc(100, 75, 50, 0, 6.28)
this.context.setLineDash([10,20])
})
}
.width('100%')
.height('100%')
}
}
```
![zh-cn_image_000000127777771](figures/zh-cn_image_000000127777771.png)
### getLineDash
getLineDash(): number[]
获得当前画布的虚线样式。
**返回值：**
| 类型 | 说明 |
| ----- | ------------------------ |
| number[] | 返回数组，该数组用来描述线段如何交替和间距长度。 |
**示例：** **示例：**
```ts
// xxx.ets
@Entry
@Component
struct GetLineDash {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
var grad = this.context.createLinearGradient(50,0, 300,100)
this.context.arc(100, 75, 50, 0, 6.28)
this.context.setLineDash([10,20])
this.context.stroke();
let res = this.context.getLineDash()
})
}
.width('100%')
.height('100%')
}
}
``` ```
### imageSmoothingQuality
imageSmoothingQuality(quality: imageSmoothingQuality)
用于设置图像平滑度。该接口为空接口。
**参数：**
| 参数 | 类型 | 描述 |
| ------ | ----------- | ------------------ |
| quality |imageSmoothingQuality | 支持如下三种类型：'low',&nbsp;'medium',&nbsp;'high'。 |
### transferFromImageBitmap
transferFromImageBitmap(bitmap: ImageBitmap): void
显示给定的ImageBitmap对象。
**参数：**
| 参数 | 类型 | 描述 |
| ------ | ----------- | ------------------ |
| bitmap |[ImageData](ts-components-canvas-imagebitmap.md) | 待显示的ImageBitmap对象。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct PutImageData { struct PutImageData {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
...@@ -1847,14 +2246,16 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY? ...@@ -1847,14 +2246,16 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?
.height('100%') .height('100%')
.backgroundColor('#ffff00') .backgroundColor('#ffff00')
.onReady(() =>{ .onReady(() =>{
var imageData = this.context.createImageData(100, 100) var imageData = this.offContext.createImageData(100, 100)
for (var i = 0; i < imageData.data.length; i += 4) { for (var i = 0; i < imageData.data.length; i += 4) {
imageData.data[i + 0] = 255 imageData.data[i + 0] = 255
imageData.data[i + 1] = 0 imageData.data[i + 1] = 0
imageData.data[i + 2] = 255 imageData.data[i + 2] = 255
imageData.data[i + 3] = 255 imageData.data[i + 3] = 255
} }
this.context.putImageData(imageData, 10, 10) this.offContext.putImageData(imageData, 10, 10)
var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image)
}) })
} }
.width('100%') .width('100%')
...@@ -1862,8 +2263,52 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY? ...@@ -1862,8 +2263,52 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?
} }
} }
``` ```
![zh-cn_image_000000127777773](figures/zh-cn_image_000000127777773.png)
![zh-cn_image_0000001238952387](figures/zh-cn_image_0000001238952387.png) ### toDataURL
toDataURL(type?: string, quality?: number): string
生成一个包含图片展示的URL。
**参数：**
| 参数名 | 参数类型 | 必填 | 描述 |
| ------- | ------ | ---- | ---------------------------------------- |
| type | string | 否 | 可选参数，用于指定图像格式，默认格式为image/png。 |
| quality | number | 否 | 在指定图片格式为image/jpeg或image/webp的情况下，可以从0到1的区间内选择图片的质量。如果超出取值范围，将会使用默认值0.92。 |
**返回值：**
| 类型 | 说明 |
| ------ | --------- |
| string | 图像的URL地址。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct ToDataURL {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
var dataURL = this.context.toDataURL();
})
}
.width('100%')
.height('100%')
}
}
```
### restore ### restore
...@@ -1872,14 +2317,17 @@ restore(): void ...@@ -1872,14 +2317,17 @@ restore(): void
对保存的绘图上下文进行恢复。 对保存的绘图上下文进行恢复。
**示例：** **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private img:ImageBitmap = new ImageBitmap("common/images/icon.jpg")
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1901,16 +2349,18 @@ restore(): void ...@@ -1901,16 +2349,18 @@ restore(): void
save(): void save(): void
对当前的绘图上下文进行保存。 将当前状态放入栈中，保存canvas的全部状态，通常在需要保存绘制状态时调用。
**示例：** **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -1934,16 +2384,19 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void ...@@ -1934,16 +2384,19 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void
创建一个线性渐变色。 创建一个线性渐变色。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------- |
| x0 | number | 是 | 0 | 起点的x轴坐标。 |
| y0 | number | 是 | 0 | 起点的y轴坐标。 |
| x1 | number | 是 | 0 | 终点的x轴坐标。 |
| y1 | number | 是 | 0 | 终点的y轴坐标。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | -------- |
| x0 | number | 是 | 0 | 起点的x轴坐标。 |
| y0 | number | 是 | 0 | 起点的y轴坐标。 |
| x1 | number | 是 | 0 | 终点的x轴坐标。 |
| y1 | number | 是 | 0 | 终点的y轴坐标。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreateLinearGradient { struct CreateLinearGradient {
...@@ -1980,18 +2433,21 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, ...@@ -1980,18 +2433,21 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
创建一个径向渐变色。 创建一个径向渐变色。
**参数：** **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------------- |
| x0 | number | 是 | 0 | 起始圆的x轴坐标。 |
| y0 | number | 是 | 0 | 起始圆的y轴坐标。 |
| r0 | number | 是 | 0 | 起始圆的半径。必须是非负且有限的。 |
| x1 | number | 是 | 0 | 终点圆的x轴坐标。 |
| y1 | number | 是 | 0 | 终点圆的y轴坐标。 |
| r1 | number | 是 | 0 | 终点圆的半径。必须为非负且有限的。 |
**示例：** | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | ---- | ------ | ---- | ---- | ----------------- |
| x0 | number | 是 | 0 | 起始圆的x轴坐标。 |
| y0 | number | 是 | 0 | 起始圆的y轴坐标。 |
| r0 | number | 是 | 0 | 起始圆的半径。必须是非负且有限的。 |
| x1 | number | 是 | 0 | 终点圆的x轴坐标。 |
| y1 | number | 是 | 0 | 终点圆的y轴坐标。 |
| r1 | number | 是 | 0 | 终点圆的半径。必须为非负且有限的。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreateRadialGradient { struct CreateRadialGradient {
......
zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-canvas.md
浏览文件 @ 3bc24b2e
# Canvas # Canvas
> **说明：** > **说明：** 该组件从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
>
> 该组件从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
提供画布组件，用于自定义绘制图形。 提供画布组件，用于自定义绘制图形。
...@@ -16,13 +14,13 @@ ...@@ -16,13 +14,13 @@
## 接口 ## 接口
Canvas(context: CanvasRenderingContext2D) Canvas(context?: CanvasRenderingContext2D)
**参数：** **参数：**
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ---------------------------------------- | ---- | ---- | ---------------------------- | | ------- | ---------------------------------------- | ---- | ---- | ---------------------------- |
| context | [CanvasRenderingContext2D](ts-canvasrenderingcontext2d.md) | 是 | - | 见CanvasRenderingContext2D对象。 | | context | [CanvasRenderingContext2D](ts-canvasrenderingcontext2d.md) | 否 | - | 见CanvasRenderingContext2D对象。 |
## 属性 ## 属性
...@@ -34,7 +32,7 @@ Canvas(context: CanvasRenderingContext2D) ...@@ -34,7 +32,7 @@ Canvas(context: CanvasRenderingContext2D)
| 名称 | 参数 | 描述 | | 名称 | 参数 | 描述 |
| ----------------------------- | ---- | -------------------- | | ----------------------------- | ---- | -------------------- |
| onReady(callback: () => void) | 无 | 画布组件的事件回调，可以在此时进行绘制。 | | onReady(event: () => void) | 无 | 画布组件的事件回调，可以在此时进行绘制。 |
## 示例 ## 示例
......
zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-imagebitmap.md
浏览文件 @ 3bc24b2e
# ImageBitmap对象 # ImageBitmap对象
> **说明：** > **说明：**
> > 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
> 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
CanvasImageData对象可以存储canvas渲染的像素数据。 ImageBitmap对象可以存储canvas渲染的像素数据。
## 属性 ## 属性
| 属性 | 类型 | 描述 | | 属性 | 类型 | 描述 |
| ------ | ------------------------- | ---------------------------- | | -------- | -------- | -------- |
| width | number | 矩形区域实际像素宽度。 | | width | number | ImageBitmap的像素宽度。 |
| height | number | 矩形区域实际像素高度。 | | height | number | ImageBitmap的像素高度。 |
| data | &lt;Uint8ClampedArray&gt; | 一维数组，保存了相应的颜色数据，数据值范围为0到255。 |
## 方法
### close
close()
释放ImageBitmap对象相关联的所有图形资源。该接口为空接口。
\ No newline at end of file
zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-imagedata.md
浏览文件 @ 3bc24b2e
# ImageData对象 # ImageData对象
> **说明：** > **说明：**
> > 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
> 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
ImageData对象可以存储canvas渲染的像素数据。 ImageData对象可以存储canvas渲染的像素数据。
...@@ -10,8 +9,9 @@ ImageData对象可以存储canvas渲染的像素数据。 ...@@ -10,8 +9,9 @@ ImageData对象可以存储canvas渲染的像素数据。
## 属性 ## 属性
| 属性 | 类型 | 描述 | | 属性 | 类型 | 描述 |
| ------ | ------------------------- | ---------------------------- | | -------- | -------- | -------- |
| width | number | 矩形区域实际像素宽度。 | | width | number | 矩形区域实际像素宽度。 |
| height | number | 矩形区域实际像素高度。 | | height | number | 矩形区域实际像素高度。 |
| data | &lt;Uint8ClampedArray&gt; | 一维数组，保存了相应的颜色数据，数据值范围为0到255。 | | data | Uint8ClampedArray | 一维数组，保存了相应的颜色数据，数据值范围为0到255。 |
zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-path2d.md
浏览文件 @ 3bc24b2e
# Path2D对象 # Path2D对象
> **说明：** > **说明：**
> > 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
> 从 API Version 8 开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
路径对象，支持通过对象的接口进行路径的描述，并通过Canvas的stroke接口进行绘制。 路径对象，支持通过对象的接口进行路径的描述，并通过Canvas的stroke接口进行绘制。
...@@ -10,26 +9,31 @@ ...@@ -10,26 +9,31 @@
## addPath ## addPath
addPath(path: Object): void addPath(path: path2D, transform?:Matrix2D): void
将另一个路径添加到当前的路径对象中。 将另一个路径添加到当前的路径对象中。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------------- |
| path | Object | 是 | null | 需要添加到当前路径的路径对象 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| path | path2D | 是 | - | 需要添加到当前路径的路径对象。|
| transform | Matrix2D | 否 | null | 新增路径的变换矩阵对象。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct AddPath { struct AddPath {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Da: Path2D = new Path2D("M250 150 L150 350 L350 350 Z") private path2Da: Path2D = new Path2D("M250 150 L150 350 L350 350 Z")
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -56,15 +60,17 @@ closePath(): void ...@@ -56,15 +60,17 @@ closePath(): void
将路径的当前点移回到路径的起点，当前点到起点间画一条直线。如果形状已经闭合或只有一个点，则此功能不执行任何操作。 将路径的当前点移回到路径的起点，当前点到起点间画一条直线。如果形状已经闭合或只有一个点，则此功能不执行任何操作。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ClosePath { struct ClosePath {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -94,21 +100,24 @@ moveTo(x: number, y: number): void ...@@ -94,21 +100,24 @@ moveTo(x: number, y: number): void
将路径的当前坐标点移动到目标点，移动过程中不绘制线条。 将路径的当前坐标点移动到目标点，移动过程中不绘制线条。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ------- |
| x | number | 是 | 0 | 目标点X轴坐标 |
| y | number | 是 | 0 | 目标点Y轴坐标 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| x | number | 是 | 0 | 目标点X轴坐标。 |
| y | number | 是 | 0 | 目标点Y轴坐标。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct MoveTo { struct MoveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -138,21 +147,24 @@ lineTo(x: number, y: number): void ...@@ -138,21 +147,24 @@ lineTo(x: number, y: number): void
从当前点绘制一条直线到目标点。 从当前点绘制一条直线到目标点。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ------- |
| x | number | 是 | 0 | 目标点X轴坐标 |
| y | number | 是 | 0 | 目标点Y轴坐标 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| x | number | 是 | 0 | 目标点X轴坐标。 |
| y | number | 是 | 0 | 目标点Y轴坐标。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct LineTo { struct LineTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -183,25 +195,28 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, ...@@ -183,25 +195,28 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number,
创建三次贝赛尔曲线的路径。 创建三次贝赛尔曲线的路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------------- | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 | | -------- | -------- | -------- | -------- | -------- |
| cp1y | number | 是 | 0 | 第一个贝塞尔参数的y坐标值。 | | cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 |
| cp2x | number | 是 | 0 | 第二个贝塞尔参数的x坐标值。 | | cp1y | number | 是 | 0 | 第一个贝塞尔参数的y坐标值。 |
| cp2y | number | 是 | 0 | 第二个贝塞尔参数的y坐标值。 | | cp2x | number | 是 | 0 | 第二个贝塞尔参数的x坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 | | cp2y | number | 是 | 0 | 第二个贝塞尔参数的y坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 | | x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
- 示例
``` **示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct BezierCurveTo { struct BezierCurveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -228,23 +243,26 @@ quadraticCurveTo(cpx: number, cpy: number, x: number ,y: number): void ...@@ -228,23 +243,26 @@ quadraticCurveTo(cpx: number, cpy: number, x: number ,y: number): void
创建二次贝赛尔曲线的路径。 创建二次贝赛尔曲线的路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------- |
| cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 |
| cpy | number | 是 | 0 | 贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 |
| cpy | number | 是 | 0 | 贝塞尔参数的y坐标值。 |
| x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct QuadraticCurveTo { struct QuadraticCurveTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -268,29 +286,32 @@ quadraticCurveTo(cpx: number, cpy: number, x: number ,y: number): void ...@@ -268,29 +286,32 @@ quadraticCurveTo(cpx: number, cpy: number, x: number ,y: number): void
## arc ## arc
arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, counterclockwise?: boolean): void
绘制弧线路径。 绘制弧线路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------------- | ------- | ---- | ----- | ---------- | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| x | number | 是 | 0 | 弧线圆心的x坐标值。 | | -------- | -------- | -------- | -------- | -------- |
| y | number | 是 | 0 | 弧线圆心的y坐标值。 | | x | number | 是 | 0 | 弧线圆心的x坐标值。 |
| radius | number | 是 | 0 | 弧线的圆半径。 | | y | number | 是 | 0 | 弧线圆心的y坐标值。 |
| startAngle | number | 是 | 0 | 弧线的起始弧度。 | | radius | number | 是 | 0 | 弧线的圆半径。 |
| endAngle | number | 是 | 0 | 弧线的终止弧度。 | | startAngle | number | 是 | 0 | 弧线的起始弧度。 |
| anticlockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 | | endAngle | number | 是 | 0 | 弧线的终止弧度。 |
| counterclockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 |
- 示例
``` **示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Arc { struct Arc {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -316,24 +337,27 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -316,24 +337,27 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
依据圆弧经过的点和圆弧半径创建圆弧路径。 依据圆弧经过的点和圆弧半径创建圆弧路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | --------------- |
| x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 |
| y1 | number | 是 | 0 | 圆弧经过的第一个点的y坐标值。 |
| x2 | number | 是 | 0 | 圆弧经过的第二个点的x坐标值。 |
| y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 |
| radius | number | 是 | 0 | 圆弧的圆半径值。 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 |
| y1 | number | 是 | 0 | 圆弧经过的第一个点的y坐标值。 |
| x2 | number | 是 | 0 | 圆弧经过的第二个点的x坐标值。 |
| y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 |
| radius | number | 是 | 0 | 圆弧的圆半径值。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ArcTo { struct ArcTo {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -356,31 +380,34 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -356,31 +380,34 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
## ellipse ## ellipse
ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: number): void ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, counterclockwise?: number): void
在规定的矩形区域绘制一个椭圆。 在规定的矩形区域绘制一个椭圆。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------------- | ------ | ---- | ---- | ------------------------------------ | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| x | number | 是 | 0 | 椭圆圆心的x轴坐标。 | | -------- | -------- | -------- | -------- | -------- |
| y | number | 是 | 0 | 椭圆圆心的y轴坐标。 | | x | number | 是 | 0 | 椭圆圆心的x轴坐标。 |
| radiusX | number | 是 | 0 | 椭圆x轴的半径长度。 | | y | number | 是 | 0 | 椭圆圆心的y轴坐标。 |
| radiusY | number | 是 | 0 | 椭圆y轴的半径长度。 | | radiusX | number | 是 | 0 | 椭圆x轴的半径长度。 |
| rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 | | radiusY | number | 是 | 0 | 椭圆y轴的半径长度。 |
| startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 | | rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 |
| endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 | | startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 |
| anticlockwise | number | 否 | 0 | 是否以逆时针方向绘制椭圆，0为顺时针，1为逆时针。(可选参数，默认为0) | | endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 |
| counterclockwise | number | 否 | 0 | 是否以逆时针方向绘制椭圆，0为顺时针，1为逆时针。(可选参数，默认为0) |
- 示例
``` **示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
...@@ -403,27 +430,30 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number ...@@ -403,27 +430,30 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number
## rect ## rect
rect(x: number, y: number, width: number, height: number): void rect(x: number, y: number, w: number, h: number): void
创建矩形路径。 创建矩形路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形的左上角x坐标值。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标值。 |
| width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 |
- 示例 | 参数 | 类型 | 必填 | 默认值 | 描述 |
``` | -------- | -------- | -------- | -------- | -------- |
| x | number | 是 | 0 | 指定矩形的左上角x坐标值。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标值。 |
| w | number | 是 | 0 | 指定矩形的宽度。 |
| h | number | 是 | 0 | 指定矩形的高度。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true) private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings) private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private path2Db: Path2D = new Path2D() private path2Db: Path2D = new Path2D()
build() { build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context) Canvas(this.context)
......
zh-cn/application-dev/reference/arkui-ts/ts-drawing-components-circle.md
浏览文件 @ 3bc24b2e
...@@ -19,21 +19,32 @@ ...@@ -19,21 +19,32 @@
## 接口 ## 接口
Circle(value?: {width: string&nbsp;|&nbsp;number, height: string&nbsp;|&nbsp;number}) Circle(options?: {width?: string | number, height?: string | number})
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string \| number | 否 | 0 | 宽度。 |
| height | string \| number | 否 | 0 | 高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------------------------- | ---- | ------ | -------- |
| width | string&nbsp;\|&nbsp;number | 是 | - | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 是 | - | 高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| -------- | -------- | ------ | ---- | ------------------ |
| width | Length | 0 | 否 | 圆所在矩形的宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | Length | 0 | 否 | 圆所在矩形的高度。 | | -------- | -------- | -------- | -------- | -------- |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## 示例 ## 示例
......
zh-cn/application-dev/reference/arkui-ts/ts-drawing-components-ellipse.md
浏览文件 @ 3bc24b2e
...@@ -20,21 +20,32 @@ ...@@ -20,21 +20,32 @@
## 接口 ## 接口
Ellipse(value?: {width: string&nbsp;|&nbsp;number, height: string&nbsp;|&nbsp;number}) ellipse(options?: {width?: string | number, height?: string | number})
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string \| number | 否 | 0 | 宽度。 |
| height | string \| number | 否 | 0 | 高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------------------------- | ---- | ------ | -------- |
| width | string&nbsp;\|&nbsp;number | 是 | - | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 是 | - | 高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| -------- | -------- | ------ | ---- | -------------------- |
| width | Length | 0 | 否 | 椭圆所在矩形的宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | Length | 0 | 否 | 椭圆所在矩形的高度。 | | -------- | -------- | -------- | -------- | -------- |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 |设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## 示例 ## 示例
......
zh-cn/application-dev/reference/arkui-ts/ts-drawing-components-line.md
浏览文件 @ 3bc24b2e
...@@ -19,23 +19,34 @@ ...@@ -19,23 +19,34 @@
## 接口 ## 接口
Line(value?: {width: string&nbsp;|&nbsp;number, height: string&nbsp;|&nbsp;number}) Line(options?: {width?: string | number, height?: string | number})
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string \| number | 否 | 0 | 宽度。 |
| height | string \| number | 否 | 0 | 高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------------------------- | ---- | ------ | -------- |
| width | string&nbsp;\|&nbsp;number | 是 | - | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 是 | - | 高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| ---------- | ------------- | ----------- | ---- | ------------------------ |
| width | [Length](ts-types.md#length) | 0 | 否 | 直线所在矩形的宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | [Length](ts-types.md#length) | 0 | 否 | 直线所在矩形的高度。 | | -------- | -------- | -------- | -------- | -------- |
| startPoint | Array | [0,&nbsp;0] | 是 | 直线起点坐标点(相对坐标)。 | | startPoint | Array | [0,&nbsp;0] | 是 | 直线起点坐标点(相对坐标)。 |
| endPoint | Array | [0,&nbsp;0] | 是 | 直线终点坐标点(相对坐标)。 | | endPoint | Array | [0,&nbsp;0] | 是 | 直线终点坐标点(相对坐标)。 |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## 示例 ## 示例
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## 接口 ## 接口
Path(value?: { width?: number | string, height?: number | string, commands?: string }) Path(value?: { width?: number | string; height?: number | string; commands?: string })
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 | | 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | ---------------- | ---- | ---- | ----------- | | -------- | -------- | ---- | ------ | -------------------- |
| width | number \| string | 否 | 0 | 路径所在矩形的宽度。 | | width | number \| string | 否 | 0 | 路径所在矩形的宽度 |
| height | number \| string | 否 | 0 | 路径所在矩形的高度。 | | height | number \| string | 否 | 0 | 路径所在矩形的高度 |
| commands | string | 否 | '' | 路径绘制的命令字符串。 | | commands | string | 否 | '' | 路径绘制的命令字符串 |
## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| -------- | --------------------------------------- | ------ | ---- | ------------------------ |
| width | [Length](../../ui/ts-types.md#长度类型) | 0 | 否 | 路径所在矩形画布的宽度。 |
| height | [Length](../../ui/ts-types.md#长度类型) | 0 | 否 | 路径所在矩形画布的高度。 |
| commands | string | '' | 否 | 路径绘制的命令字符串。 |
支持的绘制命令如下：
- M = moveto
- L = lineto
- H = horizontal lineto
- V = vertical lineto
- C = curveto
- S = smooth curveto
- Q = quadratic Belzier curve
- T = smooth quadratic Belzier curveto
- A = elliptical Arc
- Z = closepath
## 属性
如 commands('M0 20 L50 50 L50 100 Z')定义了一条路径，开始于位置（0，20），到达位置（50，50）后再到（50，100），最后在（0，20）处关闭路径。 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| -------- | ----------------------------------- | ---- | ---- | ---------------------------------------- |
| commands | string | '' | 否 | 路径绘制的命令字符串，单位为px。像素单位转换方法请参考[像素单位转换](../../ui/ts-pixel-units.md)。 |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
commands支持的绘制命令如下：
| 命令 | 名称 | 参数 | 说明 |
| ---- | -------------------------------- | ---------------------------------------- | ---------------------------------------- |
| M | moveto | （x y） | 在给定的 (x, y) 坐标处开始一个新的子路径。例如，`M 0 0` 表示将（0, 0）点作为新子路径的起始点。 |
| L | lineto | （x y） | 从当前点到给定的 (x, y) 坐标画一条线，该坐标成为新的当前点。例如，`L 50 50` 表示绘制当前点到（50, 50）点的直线，并将（50, 50）点作为新子路径的起始点。 |
| H | horizontal lineto | x | 从当前点绘制一条水平线，等效于将y坐标指定为0的L命令。例如，`H 50 ` 表示绘制当前点到（50, 0）点的直线，并将（50, 0）点作为新子路径的起始点。 |
| V | vertical lineto | y | 从当前点绘制一条垂直线，等效于将x坐标指定为0的L命令。例如，`V 50 ` 表示绘制当前点到（0, 50）点的直线，并将（0, 50）点作为新子路径的起始点。 |
| C | curveto | (x1 y1 x2 y2 x y) | 使用 (x1, y1) 作为曲线起点的控制点， (x2, y2) 作为曲线终点的控制点，从当前点到 (x, y) 绘制三次贝塞尔曲线。例如，`C100 100 250 100 250 200 ` 表示绘制当前点到（250, 200）点的三次贝塞尔曲线，并将（250, 200）点作为新子路径的起始点。 |
| S | smooth curveto | (x2 y2 x y) | (x2, y2) 作为曲线终点的控制点，绘制从当前点到 (x, y) 绘制三次贝塞尔曲线。若前一个命令是C或S，则起点控制点是上一个命令的终点控制点相对于起点的映射。 例如，`C100 100 250 100 250 200 S400 300 400 200`第二段贝塞尔曲线的起点控制点为（250, 300）。如果没有前一个命令或者前一个命令不是 C或S，则第一个控制点与当前点重合。 |
| Q | quadratic Belzier curve | (x1 y1 x y) | 使用 (x1, y1) 作为控制点，从当前点到 (x, y) 绘制二次贝塞尔曲线。例如，`Q400 50 600 300 ` 表示绘制当前点到（600, 300）点的二次贝塞尔曲线，并将（600, 300）点作为新子路径的起始点。 |
| T | smooth quadratic Belzier curveto | (x y) | 绘制从当前点到 (x, y) 绘制二次贝塞尔曲线。若前一个命令是Q或T，则控制点是上一个命令的终点控制点相对于起点的映射。 例如，`Q400 50 600 300 T1000 300`第二段贝塞尔曲线的控制点为（800, 350）。 如果没有前一个命令或者前一个命令不是 Q或T，则第一个控制点与当前点重合。 |
| A | elliptical Arc | (rx ry x-axis-rotation large-arc-flag sweep-flag x y) | 从当前点到 (x, y) 绘制一条椭圆弧。椭圆的大小和方向由两个半径 (rx, ry) 和x-axis-rotation定义，指示整个椭圆相对于当前坐标系如何旋转（以度为单位）。 large-arc-flag 和 sweep-flag确定弧的绘制方式。 |
| Z | closepath | none | 通过将当前路径连接回当前子路径的初始点来关闭当前子路径。 |
例如： commands('M0 20 L50 50 L50 100 Z')定义了一个三角形，起始于位置（0，20），接着绘制点（0，20）到点（50，50）的直线，再绘制点（50，50）到点（50，100）的直线，最后绘制点（50，100）到（0，20）的直线关闭路径，形成封闭三角形。
## 示例 ## 示例
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## 接口 ## 接口
Polygon(value?:{width?: string&nbsp;|&nbsp;number, height?: string&nbsp;|&nbsp;number}) Polygon(options?: {width?: string | number, height?: string | number})
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string \| number | 否 | 0 | 宽度。 |
| height | string \| number | 否 | 0 | 高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------------------------- | ---- | ------ | -------- |
| width | string&nbsp;\|&nbsp;number | 是 | - | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 是 | - | 高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| -------- | ---------------- | ------ | ---- | ---------------------- |
| width | Length | 0 | 否 | 多边形所在矩形的宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | Length | 0 | 否 | 多边形所在矩形的高度。 | | -------- | -------- | -------- | -------- | -------- |
| points | Array&lt;any&gt; | - | 是 | 多边形的顶点坐标列表。 | | points | Array&lt;Point&gt; | [] | 否 | 多边形的顶点坐标列表。 |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## Point
点坐标类型。
| 名称 | 类型定义 | 描述 |
| --------- | -------------------- | ------------------------------------------------------------ |
| Point | [number,&nbsp;number] | 第一个参数为x轴坐标，第二个参数为y轴坐标（相对坐标）。 |
## 示例 ## 示例
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## 接口 ## 接口
Polyline(value?: {width?: string&nbsp;|&nbsp;number, height?: string&nbsp;|&nbsp;number}) Polyline(options?: {width?: string | number, height?: string | number})
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string \| number | 否 | 0 | 宽度。 |
| height | string \| number | 否 | 0 | 高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------------------------- | ---- | ------ | -------- |
| width | string&nbsp;\|&nbsp;number | 是 | - | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 是 | - | 高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| -------- | ---------------- | ------ | ---- | -------------------- |
| width | Length | 0 | 否 | 折线所在矩形的宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | Length | 0 | 否 | 折线所在矩形的高度。 | | -------- | -------- | -------- | -------- | -------- |
| points | Array&lt;any&gt; | - | 是 | 折线经过坐标点列表。 | | points | Array&lt;Point&gt; | [] | 否 | 折线经过坐标点列表。 |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## Point
点坐标类型。
| 名称 | 类型定义 | 描述 |
| --------- | -------------------- | ------------------------------------------------------------ |
| Point | [number,&nbsp;number] | 第一个参数为x轴坐标，第二个参数为y轴坐标（相对坐标）。 |
## 示例 ## 示例
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## 接口 ## 接口
Rect(value:{value?: {width?: number&nbsp;|&nbsp;string&nbsp;,height?: number&nbsp;|&nbsp;string&nbsp;,radius?: number&nbsp;|&nbsp;string&nbsp;| Array&lt;Length&gt;} | {width?: number&nbsp;|&nbsp;string&nbsp;,height?: number&nbsp;|&nbsp;string&nbsp;,radiusWidth?: number&nbsp;|&nbsp;string&nbsp;,radiusHeight?: number&nbsp;|&nbsp;string&nbsp;}}) Rect(options?: {width?: string | number,height?: string | number,radius?: string | number | Array&lt;string | number&gt;} |
{width?: string | number,height?: string | number,radiusWidth?: string | number,radiusHeight?: string | number})
**options参数说明：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| width | string&nbsp;\|&nbsp;number | 否 | 0 | 宽度。 |
| height | string&nbsp;\|&nbsp;number | 否 | 0 | 高度。 |
| radius | string&nbsp;\|&nbsp;number&nbsp;\|&nbsp;Array&lt;string&nbsp;\|&nbsp;number&gt; | 否 | 0 | 圆角半径，支持分别设置四个角的圆角度数。 |
| radiusWidth | string&nbsp;\|&nbsp;number | 否 | 0 | 圆角宽度。 |
| radiusHeight | string&nbsp;\|&nbsp;number | 否 | 0 | 圆角高度。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------------ | ----------------------------------------------------------- | ---- | ------ | ---------------------------------------- |
| width | number&nbsp;\|&nbsp;string | 是 | - | 宽度。 |
| height | number&nbsp;\|&nbsp;string | 是 | - | 高度。 |
| radius | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;Array&lt;any&gt; | 否 | 0 | 圆角半径，支持分别设置四个角的圆角度数。 |
| radiusWidth | number&nbsp;\|&nbsp;string | 否 | 0 | 圆角宽度。 |
| radiusHeight | number&nbsp;\|&nbsp;string | 否 | 0 | 圆角高度。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| ------------ | ------------------------------------ | ------ | ---- | -------------------------------- |
| width | Length | 0 | 否 | 宽度。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| height | Length | 0 | 否 | 高度。 | | -------- | -------- | -------- | -------- | -------- |
| radiusWidth | string&nbsp;\|&nbsp;number | 0 | 否 | 圆角的宽度，仅设置宽时宽高一致。 | | radiusWidth | string&nbsp;\|&nbsp;number | 0 | 否 | 圆角的宽度，仅设置宽时宽高一致。 |
| radiusHeight | string&nbsp;\|&nbsp;number | 0 | 否 | 圆角的高度，仅设置高时宽高一致。 | | radiusHeight | string&nbsp;\|&nbsp;number | 0 | 否 | 圆角的高度，仅设置高时宽高一致。 |
| radius | Length&nbsp;\|&nbsp;Array&lt;any&gt; | 0 | 否 | 圆角大小。 | | radius | string&nbsp;\|&nbsp;number&nbsp;\|&nbsp;Array&lt;string&nbsp;\|&nbsp;number&gt; | 0 | 否 | 圆角半径大小。 |
| fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| strokeWidth | Length | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
## 示例 ## 示例
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## 接口 ## 接口
Shape(value?: {target?: PixelMap}) Shape(value?: PixelMap)
**参数：** - 参数
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| -------- | -------- | -------- | -------- | -------- |
| value | PixelMap | 否 | - | 绘制目标，可将图形绘制在指定的PixelMap对象中，若未设置，则在当前绘制目标中进行绘制。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------ | -------- | ---- | ------ | ------------------------------------------------------------ |
| target | PixelMap | 否 | null | 绘制目标，可将图形绘制在指定的PixelMap对象中，若未设置，则在当前绘制目标中进行绘制。 |
## 属性 ## 属性
| 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 | 除支持[通用属性](ts-universal-attributes-size.md)外，还支持以下属性：
| ---------------- | ------------------------------------------------------------ | ------------------- | ---- | -------------------------- |
| viewPort | {<br/>x?:&nbsp;[Length](ts-types.md#length),<br/>y?:&nbsp;&nbsp;[Length](ts-types.md#length),<br/>width?:&nbsp;&nbsp;[Length](ts-types.md#length),<br/>height?:&nbsp;&nbsp;[Length](ts-types.md#length)<br/>} | - | 是 | 形状的视口。 | | 参数名称 | 参数类型 | 默认值 | 必填 | 参数描述 |
| fill | [ResourceColor](ts-types.md#resourcecolor8) | Black | 否 | 填充颜色。 | | -------- | -------- | -------- | -------- | -------- |
| stroke | [ResourceColor](ts-types.md#resourcecolor8) | - | 否 | 边框颜色。 | | viewPort | {<br/>x?:&nbsp;number \| string,<br/>y?:&nbsp;number \| string,<br/>width?:&nbsp;number \| string,<br/>height?:&nbsp;number \| string<br/>} | { x:0, y:0, width:0, height:0 } | 否 | 形状的视口。 |
| strokeDashArray | Array&lt;any&gt; | [] | 否 | 设置边框的间隙。 | | fill | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置填充区域颜色。 |
| strokeDashOffset | number \| string | 0 | 否 | 边框绘制起点的偏移量。 | | fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置填充区域透明度。 |
| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 路径端点绘制样式。 | | stroke | [ResourceColor](../../ui/ts-types.md) | Color.Black | 否 | 设置线条颜色。 |
| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 边框拐角绘制样式。 | | strokeDashArray | Array&lt;Length&gt; | [] | 否 | 设置线条间隙。 |
| strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 锐角绘制成斜角的极限值。 | | strokeDashOffset | number&nbsp;\|&nbsp;string | 0 | 否 | 线条绘制起点的偏移量。 |
| strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](ts-types.md#resource) | 1 | 否 | 设置边框的不透明度。 | | strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | 否 | 设置线条端点绘制样式。 |
| strokeWidth | number&nbsp;\|&nbsp;string | 1 | 否 | 设置边框的宽度。 | | strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | 否 | 设置线条拐角绘制样式。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿。 | | strokeMiterLimit | number&nbsp;\|&nbsp;string | 4 | 否 | 设置锐角绘制成斜角的极限值。 |
| mesh | Array&lt;any&gt;,<br/>column:number,<br/>row:number | - | 否 | 绘制网格时调用。 | | strokeOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;[Resource](../../ui/ts-types.md#resource类型) | 1 | 否 | 设置线条透明度。 |
| fillOpacity | number&nbsp;\|&nbsp;string&nbsp;\|&nbsp;&nbsp;[Resource](ts-types.md#resource) | 1 | 否 | 设置形状填充部分的透明度。 | | strokeWidth | number&nbsp;\|&nbsp;string | 1 | 否 | 设置线条宽度。 |
| antiAlias | boolean | true | 否 | 是否开启抗锯齿效果。 |
| mesh<sup>8+</sup> | Array&lt;number&gt;,number,number | [],0,0 | 否 | 设置mesh效果。第一个参数为长度（column + 1）* （row + 1）* 2的数组，它记录了扭曲后的位图各个顶点位置，第二个参数为mesh矩阵列数column，第三个参数为mesh矩阵行数row。 |
## 示例 ## 示例
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## 响应手势事件 ## 响应手势事件
组件通过gesture方法绑定手势对象，可以通过手势对象提供的事件相应响应手势操作。如通过TapGesture对象的onAction事件响应点击事件。具体事件定义见各个手势对象章节。 组件通过gesture方法绑定手势对象，可以通过手势对象提供的事件相应响应手势操作。例如通过TapGesture对象的onAction事件响应点击事件。其余手势的事件定义见各个手势对象章节。
- TapGesture事件说明 - TapGesture事件说明
| 名称 | 功能描述 | | 名称 | 功能描述 |
...@@ -51,10 +51,36 @@ ...@@ -51,10 +51,36 @@
| onAction((event?:GestureEvent)&nbsp;=&gt;&nbsp;void) | Tap手势识别成功回调。 | | onAction((event?:GestureEvent)&nbsp;=&gt;&nbsp;void) | Tap手势识别成功回调。 |
- GestureEvent对象说明 - GestureEvent对象说明
| 属性名称 | 属性类型 | 描述 | | 名称 | 类型 | 描述 |
| -------- | -------- | -------- | | -------- | -------- | -------- |
| timestamp | number | 事件时间戳。 | | timestamp<sup>8+</sup> | number | 事件时间戳。 |
| target<sup>8+</sup> | [EventTarget](ts-universal-events-click.md) | 触发手势事件的元素对象。 | | target<sup>8+</sup> | [EventTarget](ts-universal-events-click.md) | 触发手势事件的元素对象显示区域。 |
| source<sup>8+</sup> | SourceType | 事件输入设备。 |
| repeat | boolean | 是否为重复触发事件，用于LongPressGesture手势触发场景。 |
| fingerList<sup>8+</sup> | FingerInfo[] | 触发事件的所有手指信息，用于LongPressGesture与TapGesture手势触发场景。 |
| offsetX | number | 手势事件x轴偏移量，单位为vp，用于PanGesture手势触发场景。 |
| offsetY | number | 手势事件y轴偏移量，单位为vp，用于PanGesture手势触发场景。 |
| angle | number | 用于RotationGesture手势触发场景时，表示旋转角度；用于SwipeGesture手势触发场景时，表示滑动手势的角度，即两根手指间的线段与水平方向的夹角变化的度数。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;角度计算方式：滑动手势被识别到后，连接两根手指之间的线被识别为起始线条，随着手指的滑动，手指之间的线条会发生旋转，根据起始线条两端点和当前线条两端点的坐标，使用反正切函数分别计算其相对于水平方向的夹角，最后arctan2(cy2-cy1,cx2-cx1)-arctan2(y2-y1,x2-x1)为旋转的角度。以起始线条为坐标系，顺时针旋转为0到180度，逆时针旋转为-180到0度。 |
| speed<sup>8+</sup> | number | 滑动手势速度，即所有手指滑动的平均速度，单位为vp/秒，用于SwipeGesture手势触发场景。 |
| scale | number | 缩放比例，用于PinchGesture手势触发场景。 |
| pinchCenterX | number | 捏合手势中心点x轴坐标，单位为vp，用于PinchGesture手势触发场景。 |
| pinchCenterY | number | 捏合手势中心点y轴坐标，单位为vp，用于PinchGesture手势触发场景。 |
- SourceType
| 名称 | 描述 |
| -------- | -------- |
| Unknown | 未知设备。 |
| Mouse | 鼠标。 |
| TouchScreen | 触摸屏。 |
- FingerInfo对象说明
| 名称 | 类型 | 描述 |
| -------- | -------- | -------- |
| id | number | 手指的索引编号。 |
| globalX | number | 相对于设备屏幕左上角的x轴坐标。 |
| globalY | number | 相对于设备屏幕左上角的y轴坐标。 |
| localX | number | 相对于当前组件元素左上角的x轴坐标。 |
| localY | number | 相对于当前组件元素左上角的y轴坐标。 |
## 示例 ## 示例
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| range | string[] | 是 | - | 选择器的数据选择范围。 | | range | string[] | 是 | - | 选择器的数据选择范围。 |
| selected | number | 否 | 0 | 选中项在数组中的index值。 | | selected | number | 否 | 0 | 选中项在数组中的index值。 |
| value | string | 否 | 第一个元素值 | 选中项的值，优先级低于selected。 | | value | string | 否 | 第一个元素值 | 选中项的值，优先级低于selected。 |
| defaultPickerItemHeight | number | 否 | - | 默认Picker内容项元素高度。 | | defaultPickerItemHeight | number \| string | 否 | - | 默认Picker内容项元素高度。 |
| onAccept | (value: TextPickerResult) => void | 否 | - | 点击弹窗中确定按钮时触发。 | | onAccept | (value: TextPickerResult) => void | 否 | - | 点击弹窗中确定按钮时触发。 |
| onCancel | () => void | 否 | - | 点击弹窗中取消按钮时触发。 | | onCancel | () => void | 否 | - | 点击弹窗中取消按钮时触发。 |
| onChange | (value: TextPickerResult) => void | 否 | - | 滑动选择器，当前选择项改变时触发。 | | onChange | (value: TextPickerResult) => void | 否 | - | 滑动选择器，当前选择项改变时触发。 |
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OffscreenCanvasRenderingContext2D(width: number, height: number, setting: RenderingContextSettings) OffscreenCanvasRenderingContext2D(width: number, height: number, setting: RenderingContextSettings)
- 参数 **参数：**
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ---------------------------------------- | ---- | ---- | ------------------------------ |
| width | number | 是 | - | 离屏画布的宽度 |
| height | number | 是 | - | 离屏画布的高度 |
| setting | [RenderingContextSettings](ts-canvasrenderingcontext2d.md#renderingcontextsettings) | 是 | - | 见RenderingContextSettings接口描述。 |
| 参数名 | 参数类型 | 必填 | 默认值 | 参数描述 |
| ------- | ---------------------------------------- | ---- | ---- | ------------------------------ |
| width | number | 是 | - | 离屏画布的宽度 |
| height | number | 是 | - | 离屏画布的高度 |
| setting | [RenderingContextSettings](ts-canvasrenderingcontext2d.md#renderingcontextsettings) | 是 | - | 见RenderingContextSettings接口描述。 |
## 属性
| 名称 | 类型 | 默认值 | 描述 | ## 属性
| ---------------------------------------- | ---------------------------------------- | ---------------------------------------- | ---------------------------------------- |
| [fillStyle](#fillstyle) | &lt;color&gt;&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | - | 指定绘制的填充色。<br/>-&nbsp;类型为&lt;color&gt;时，表示设置填充区域的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用&nbsp;[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineWidth](#linewidth) | number | - | 设置绘制线条的宽度。 |
| [strokeStyle](#strokestyle) | &lt;color&gt;&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | - | 设置描边的颜色。<br/>-&nbsp;类型为&lt;color&gt;时，表示设置描边使用的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineCap](#linecap) | string | 'butt' | 指定线端点的样式，可选值为：<br/>-&nbsp;'butt'：线端点以方形结束。<br/>-&nbsp;'round'：线端点以圆形结束。<br/>-&nbsp;'square'：线端点以方形结束，该样式下会增加一个长度和线段厚度相同，宽度是线段厚度一半的矩形。 |
| [lineJoin](#linejoin) | string | 'miter' | 指定线段间相交的交点样式，可选值为：<br/>-&nbsp;'round'：在线段相连处绘制一个扇形，扇形的圆角半径是线段的宽度。<br/>-&nbsp;'bevel'：在线段相连处使用三角形为底填充，&nbsp;每个部分矩形拐角独立。<br/>-&nbsp;'miter'：在相连部分的外边缘处进行延伸，使其相交于一点，形成一个菱形区域，该属性可以通过设置miterLimit属性展现效果。 |
| [miterLimit](#miterlimit) | number | 10 | 设置斜接面限制值，该值指定了线条相交处内角和外角的距离。 |
| [font](#font) | string | 'normal&nbsp;normal&nbsp;14px&nbsp;sans-serif' | 设置文本绘制中的字体样式。<br/>语法：ctx.font='font-size&nbsp;font-family'<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列。<br/>语法：ctx.font='font-style&nbsp;font-weight&nbsp;font-size&nbsp;font-family'<br/>-&nbsp;font-style(可选)，用于指定字体样式，支持如下几种样式：'normal',&nbsp;'italic'。<br/>-&nbsp;font-weight(可选)，用于指定字体的粗细，支持如下几种类型：'normal',&nbsp;'bold',&nbsp;'bolder',&nbsp;'lighter',&nbsp;100,&nbsp;200,&nbsp;300,&nbsp;400,&nbsp;500,&nbsp;600,&nbsp;700,&nbsp;800,&nbsp;900。<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列，支持如下几种类型：'sans-serif',&nbsp;'serif',&nbsp;'monospace'。 |
| [textAlign](#textalign) | string | 'left' | 设置文本绘制中的文本对齐方式，可选值为：<br/>-&nbsp;'left'：文本左对齐。<br/>-&nbsp;'right'：文本右对齐。<br/>-&nbsp;'center'：文本居中对齐。<br/>-&nbsp;'start'：文本对齐界线开始的地方。<br/>-&nbsp;'end'：文本对齐界线结束的地方。<br/>>&nbsp;&nbsp;**说明：**<br/>>&nbsp;ltr布局模式下start和left一致，rtl布局模式下start和right一致·。 |
| [textBaseline](#textbaseline) | string | 'alphabetic' | 设置文本绘制中的水平对齐方式，可选值为：<br/>-&nbsp;'alphabetic'：文本基线是标准的字母基线。<br/>-&nbsp;'top'：文本基线在文本块的顶部。<br/>-&nbsp;'hanging'：文本基线是悬挂基线。<br/>-&nbsp;'middle'：文本基线在文本块的中间。<br/>-&nbsp;'ideographic'：文字基线是表意字基线；如果字符本身超出了alphabetic基线，那么ideograhpic基线位置在字符本身的底部。<br/>-&nbsp;'bottom'：文本基线在文本块的底部。&nbsp;与ideographic基线的区别在于ideographic&nbsp;基线不需要考虑下行字母。 |
| [globalAlpha](#globalalpha) | number | - | 设置透明度，0.0为完全透明，1.0为完全不透明。 |
| [lineDashOffset](#linedashoffset) | number | 0.0 | 设置画布的虚线偏移量，精度为float。 |
| [globalCompositeOperation](#globalcompositeoperation) | string | 'source-over' | 设置合成操作的方式。类型字段可选值有'source-over'，'source-atop'，'source-in'，'source-out'，'destination-over'，'destination-atop'，'destination-in'，'destination-out'，'lighter'，'copy'，'xor'。 |
| [shadowBlur](#shadowblur) | number | 0.0 | 设置绘制阴影时的模糊级别，值越大越模糊，精度为float。 |
| [shadowColor](#shadowcolor) | &lt;color&gt; | - | 设置绘制阴影时的阴影颜色。 |
| [shadowOffsetX](#shadowoffsetx) | number | - | 设置绘制阴影时和原有对象的水平偏移值。 |
| [shadowOffsetY](#shadowoffsety) | number | - | 设置绘制阴影时和原有对象的垂直偏移值。 |
| [imageSmoothingEnabled](#imagesmoothingenabled) | boolean | true | 用于设置绘制图片时是否进行图像平滑度调整，true为启用，false为不启用。 |
| imageSmoothingQuality | string | 'low' | 用于设置图像平滑度，支持如下三种类型：'low',&nbsp;'medium',&nbsp;'high'。 |
> **说明：** | 名称 | 类型 | 描述 |
> &lt;color&gt;类型格式为 'rgb(255, 255, 255)'，'rgba(255, 255, 255, 1.0)'，'\#FFFFFF'。 | ---------------------------------------- | ---------------------------------------- | ---------------------------------------- |
| [fillStyle](#fillstyle) | string&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | 指定绘制的填充色。<br/>-&nbsp;类型为string时，表示设置填充区域的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineWidth](#linewidth) | number | 设置绘制线条的宽度。 |
| [strokeStyle](#strokestyle) | string&nbsp;\|&nbsp;[CanvasGradient](ts-components-canvas-canvasgradient.md)&nbsp;\|&nbsp;[CanvasPattern](#canvaspattern) | 设置描边的颜色。<br/>-&nbsp;类型为string时，表示设置描边使用的颜色。<br/>-&nbsp;类型为CanvasGradient时，表示渐变对象，使用[createLinearGradient](#createlineargradient)方法创建。<br/>-&nbsp;类型为CanvasPattern时，使用[createPattern](#createpattern)方法创建。 |
| [lineCap](#linecap) | CanvasLineCap | 指定线端点的样式，可选值为：<br/>-&nbsp;'butt'：线端点以方形结束。<br/>-&nbsp;'round'：线端点以圆形结束。<br/>-&nbsp;'square'：线端点以方形结束，该样式下会增加一个长度和线段厚度相同，宽度是线段厚度一半的矩形。<br/>-&nbsp;默认值：'butt'。 |
| [lineJoin](#linejoin) | CanvasLineJoin | 指定线段间相交的交点样式，可选值为：<br/>-&nbsp;'round'：在线段相连处绘制一个扇形，扇形的圆角半径是线段的宽度。<br/>-&nbsp;'bevel'：在线段相连处使用三角形为底填充，&nbsp;每个部分矩形拐角独立。<br/>-&nbsp;'miter'：在相连部分的外边缘处进行延伸，使其相交于一点，形成一个菱形区域，该属性可以通过设置miterLimit属性展现效果。<br/>-&nbsp;默认值：'miter'。 |
| [miterLimit](#miterlimit) | number | 设置斜接面限制值，该值指定了线条相交处内角和外角的距离。 <br/>-&nbsp;默认值：10。 |
| [font](#font) | string | 设置文本绘制中的字体样式。<br/>语法：ctx.font='font-size&nbsp;font-family'<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列。<br/>语法：ctx.font='font-style&nbsp;font-weight&nbsp;font-size&nbsp;font-family'<br/>-&nbsp;font-style(可选)，用于指定字体样式，支持如下几种样式：'normal','italic'。<br/>-&nbsp;font-weight(可选)，用于指定字体的粗细，支持如下几种类型：'normal',&nbsp;'bold',&nbsp;'bolder',&nbsp;'lighter',&nbsp;100,&nbsp;200,&nbsp;300,&nbsp;400,&nbsp;500,&nbsp;600,&nbsp;700,&nbsp;800,&nbsp;900。<br/>-&nbsp;font-size(可选)，指定字号和行高，单位只支持px。<br/>-&nbsp;font-family(可选)，指定字体系列，支持如下几种类型：'sans-serif',&nbsp;'serif',&nbsp;'monospace'。<br/>-&nbsp;默认值：'normal normal 14px sans-serif'。 |
| [textAlign](#textalign) | CanvasTextAlign | 设置文本绘制中的文本对齐方式，可选值为：<br/>-&nbsp;'left'：文本左对齐。<br/>-&nbsp;'right'：文本右对齐。<br/>-&nbsp;'center'：文本居中对齐。<br/>-&nbsp;'start'：文本对齐界线开始的地方。<br/>-&nbsp;'end'：文本对齐界线结束的地方。<br/>>&nbsp;![icon-note.gif](public_sys-resources/icon-note.gif)&nbsp;**说明：**<br/>>&nbsp;ltr布局模式下'start'和'left'一致，rtl布局模式下'start'和'right'一致·。<br/>-&nbsp;默认值：'left'。 |
| [textBaseline](#textbaseline) | CanvasTextBaseline | 设置文本绘制中的水平对齐方式，可选值为：<br/>-&nbsp;'alphabetic'：文本基线是标准的字母基线。<br/>-&nbsp;'top'：文本基线在文本块的顶部。<br/>-&nbsp;'hanging'：文本基线是悬挂基线。<br/>-&nbsp;'middle'：文本基线在文本块的中间。<br/>-&nbsp;'ideographic'：文字基线是表意字基线；如果字符本身超出了alphabetic基线，那么ideograhpic基线位置在字符本身的底部。<br/>-&nbsp;'bottom'：文本基线在文本块的底部。&nbsp;与ideographic基线的区别在于ideographic基线不需要考虑下行字母。<br/>-&nbsp;默认值：'alphabetic'。 |
| [globalAlpha](#globalalpha) | number | 设置透明度，0.0为完全透明，1.0为完全不透明。 |
| [lineDashOffset](#linedashoffset) | number | 设置画布的虚线偏移量，精度为float。 <br/>-&nbsp;默认值：0.0。 |
| [globalCompositeOperation](#globalcompositeoperation) | string | 设置合成操作的方式。类型字段可选值有'source-over'，'source-atop'，'source-in'，'source-out'，'destination-over'，'destination-atop'，'destination-in'，'destination-out'，'lighter'，'copy'，'xor'。<br/>-&nbsp;默认值：'source-over'。 |
| [shadowBlur](#shadowblur) | number | 设置绘制阴影时的模糊级别，值越大越模糊，精度为float。 <br/>-&nbsp;默认值：0.0。 |
| [shadowColor](#shadowcolor) | string | 设置绘制阴影时的阴影颜色。 |
| [shadowOffsetX](#shadowoffsetx) | number | 设置绘制阴影时和原有对象的水平偏移值。 |
| [shadowOffsetY](#shadowoffsety) | number | 设置绘制阴影时和原有对象的垂直偏移值。 |
| [imageSmoothingEnabled](#imagesmoothingenabled) | boolean | 用于设置绘制图片时是否进行图像平滑度调整，true为启用，false为不启用。 <br/>-&nbsp;默认值：true。 |
| imageSmoothingQuality | string | 用于设置图像平滑度，支持如下三种类型：'low',&nbsp;'medium',&nbsp;'high'。<br/>-&nbsp;默认值：'low'。 |
> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
>fillStyle、shadowColor与 strokeStyle 中string类型格式为 'rgb(255, 255, 255)'，'rgba(255, 255, 255, 1.0)'，'\#FFFFFF'。
### fillStyle ### fillStyle
...@@ -143,7 +144,6 @@ struct StrokeStyleExample { ...@@ -143,7 +144,6 @@ struct StrokeStyleExample {
} }
``` ```
![zh-cn_image_0000001238712437](figures/zh-cn_image_0000001238712437.png) ![zh-cn_image_0000001238712437](figures/zh-cn_image_0000001238712437.png)
...@@ -445,6 +445,7 @@ struct LineDashOffset { ...@@ -445,6 +445,7 @@ struct LineDashOffset {
.onReady(() =>{ .onReady(() =>{
this.offContext.arc(100, 75, 50, 0, 6.28) this.offContext.arc(100, 75, 50, 0, 6.28)
this.offContext.setLineDash([10,20]) this.offContext.setLineDash([10,20])
this.offContext.lineDashOffset = 10.0;
this.offContext.stroke(); this.offContext.stroke();
var image = this.offContext.transferToImageBitmap() var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image) this.context.transferFromImageBitmap(image)
...@@ -454,8 +455,8 @@ struct LineDashOffset { ...@@ -454,8 +455,8 @@ struct LineDashOffset {
.height('100%') .height('100%')
} }
} }
```
```
![zh-cn_image_0000001238712439](figures/zh-cn_image_0000001238712439.png) ![zh-cn_image_0000001238712439](figures/zh-cn_image_0000001238712439.png)
...@@ -700,7 +701,8 @@ fillRect(x: number, y: number, w: number, h: number): void ...@@ -700,7 +701,8 @@ fillRect(x: number, y: number, w: number, h: number): void
填充一个矩形。 填充一个矩形。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------ | ------ | ---- | ---- | ------------- | | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形左上角点的x坐标。 | | x | number | 是 | 0 | 指定矩形左上角点的x坐标。 |
...@@ -708,8 +710,10 @@ fillRect(x: number, y: number, w: number, h: number): void ...@@ -708,8 +710,10 @@ fillRect(x: number, y: number, w: number, h: number): void
| width | number | 是 | 0 | 指定矩形的宽度。 | | width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 | | height | number | 是 | 0 | 指定矩形的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct FillRect { struct FillRect {
...@@ -744,7 +748,8 @@ strokeRect(x: number, y: number, w: number, h: number): void ...@@ -744,7 +748,8 @@ strokeRect(x: number, y: number, w: number, h: number): void
绘制具有边框的矩形，矩形内部不填充。 绘制具有边框的矩形，矩形内部不填充。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------ | ------ | ---- | ---- | ------------ | | ------ | ------ | ---- | ---- | ------------ |
| x | number | 是 | 0 | 指定矩形的左上角x坐标。 | | x | number | 是 | 0 | 指定矩形的左上角x坐标。 |
...@@ -752,8 +757,10 @@ strokeRect(x: number, y: number, w: number, h: number): void ...@@ -752,8 +757,10 @@ strokeRect(x: number, y: number, w: number, h: number): void
| width | number | 是 | 0 | 指定矩形的宽度。 | | width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 | | height | number | 是 | 0 | 指定矩形的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct StrokeRect { struct StrokeRect {
...@@ -787,7 +794,8 @@ clearRect(x: number, y: number, w: number, h: number): void ...@@ -787,7 +794,8 @@ clearRect(x: number, y: number, w: number, h: number): void
删除指定区域内的绘制内容。 删除指定区域内的绘制内容。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- | | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形上的左上角x坐标。 | | x | number | 是 | 0 | 指定矩形上的左上角x坐标。 |
...@@ -795,8 +803,10 @@ clearRect(x: number, y: number, w: number, h: number): void ...@@ -795,8 +803,10 @@ clearRect(x: number, y: number, w: number, h: number): void
| width | number | 是 | 0 | 指定矩形的宽度。 | | width | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 | | height | number | 是 | 0 | 指定矩形的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ClearRect { struct ClearRect {
...@@ -828,19 +838,23 @@ clearRect(x: number, y: number, w: number, h: number): void ...@@ -828,19 +838,23 @@ clearRect(x: number, y: number, w: number, h: number): void
### fillText ### fillText
fillText(text: string, x: number, y: number): void fillText(text: string, x: number, y: number, maxWidth?: number): void
绘制填充类文本。 绘制填充类文本。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | --------------- | | ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 | | text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 | | x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 | | y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
| maxWidth | number | 否 | - | 指定文本允许的最大宽度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct FillText { struct FillText {
...@@ -875,15 +889,19 @@ strokeText(text: string, x: number, y: number): void ...@@ -875,15 +889,19 @@ strokeText(text: string, x: number, y: number): void
绘制描边类文本。 绘制描边类文本。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | --------------- | | ---- | ------ | ---- | ---- | --------------- |
| text | string | 是 | “” | 需要绘制的文本内容。 | | text | string | 是 | “” | 需要绘制的文本内容。 |
| x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 | | x | number | 是 | 0 | 需要绘制的文本的左下角x坐标。 |
| y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 | | y | number | 是 | 0 | 需要绘制的文本的左下角y坐标。 |
| maxWidth | number | 否 | - | 需要绘制的文本的最大宽度 。|
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct StrokeText { struct StrokeText {
...@@ -918,23 +936,40 @@ measureText(text: string): TextMetrics ...@@ -918,23 +936,40 @@ measureText(text: string): TextMetrics
该方法返回一个文本测算的对象，通过该对象可以获取指定文本的宽度值。 该方法返回一个文本测算的对象，通过该对象可以获取指定文本的宽度值。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | ---------- | | ---- | ------ | ---- | ---- | ---------- |
| text | string | 是 | "" | 需要进行测量的文本。 | | text | string | 是 | "" | 需要进行测量的文本。 |
- 返回值 **返回值：**
| 类型 | 说明 | | 类型 | 说明 |
| ----------- | ------- | | ----------- | ------- |
| TextMetrics | 文本的尺寸信息 | | TextMetrics | 文本的尺寸信息 |
- TextMetrics类型描述 **TextMetrics类型描述:**
| 属性 | 类型 | 描述 |
| ----- | ------ | ------- | | 属性 | 类型 | 描述 |
| width | number | 字符串的宽度。 | | ----- | ------ | ------- |
| width | number | 字符串的宽度。 |
- 示例 | height | number | 字符串的高度。 |
``` | actualBoundingBoxAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的矩形边界顶部的距离，当前值为0。 |
| actualBoundingBoxDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的矩形边界底部的距离，当前值为0。 |
| actualBoundingBoxLeft | number | 平行于基线，从CanvasRenderingContext2D.textAlign 属性确定的对齐点到文本矩形边界左侧的距离，当前值为0。 |
| actualBoundingBoxRight | number | 平行于基线，从CanvasRenderingContext2D.textAlign 属性确定的对齐点到文本矩形边界右侧的距离，当前值为0。|
| alphabeticBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 alphabetic 基线的距离，当前值为0。|
| emHeightAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框中 em 方块顶部的距离，当前值为0。|
| emHeightDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框中 em 方块底部的距离，当前值为0。|
| fontBoundingBoxAscent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的所有字体的矩形最高边界顶部的距离，当前值为0。|
| fontBoundingBoxDescent | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到渲染文本的所有字体的矩形边界最底部的距离，当前值为0。|
| hangingBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 hanging 基线的距离，当前值为0。|
| ideographicBaseline | number | 从CanvasRenderingContext2D.textBaseline 属性标明的水平线到线框的 ideographic 基线的距离，当前值为0。|
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct MeasureText { struct MeasureText {
...@@ -970,13 +1005,16 @@ stroke(path?: Path2D): void ...@@ -970,13 +1005,16 @@ stroke(path?: Path2D): void
进行边框绘制操作。 进行边框绘制操作。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ---------------------------------------- | ---- | ---- | ------------ | | ---- | ---------------------------------------- | ---- | ---- | ------------ |
| path | [Path2D](ts-components-canvas-path2d.md) | 否 | null | 需要绘制的Path2D。 | | path | [Path2D](ts-components-canvas-path2d.md) | 否 | null | 需要绘制的Path2D。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Stroke { struct Stroke {
...@@ -1013,8 +1051,10 @@ beginPath(): void ...@@ -1013,8 +1051,10 @@ beginPath(): void
创建一个新的绘制路径。 创建一个新的绘制路径。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct BeginPath { struct BeginPath {
...@@ -1053,14 +1093,17 @@ moveTo(x: number, y: number): void ...@@ -1053,14 +1093,17 @@ moveTo(x: number, y: number): void
路径从当前点移动到指定点。 路径从当前点移动到指定点。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ---- | ------ | ---- | ---- | --------- | | ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 | | x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 | | y | number | 是 | 0 | 指定位置的y坐标。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct MoveTo { struct MoveTo {
...@@ -1097,14 +1140,17 @@ lineTo(x: number, y: number): void ...@@ -1097,14 +1140,17 @@ lineTo(x: number, y: number): void
从当前点到指定点进行路径连接。 从当前点到指定点进行路径连接。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | --------- | | ---- | ------ | ---- | ---- | --------- |
| x | number | 是 | 0 | 指定位置的x坐标。 | | x | number | 是 | 0 | 指定位置的x坐标。 |
| y | number | 是 | 0 | 指定位置的y坐标。 | | y | number | 是 | 0 | 指定位置的y坐标。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct LineTo { struct LineTo {
...@@ -1141,8 +1187,10 @@ closePath(): void ...@@ -1141,8 +1187,10 @@ closePath(): void
结束当前路径形成一个封闭路径。 结束当前路径形成一个封闭路径。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ClosePath { struct ClosePath {
...@@ -1177,18 +1225,27 @@ closePath(): void ...@@ -1177,18 +1225,27 @@ closePath(): void
### createPattern ### createPattern
createPattern(image: ImageBitmap, repetition: string): CanvasPattern createPattern(image: ImageBitmap, repetition: string | null): CanvasPattern | null
通过指定图像和重复方式创建图片填充的模板。 通过指定图像和重复方式创建图片填充的模板。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- | | ---------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md) | 是 | null | 图源对象，具体参考ImageBitmap对象。 | | image | [ImageBitmap](ts-components-canvas-imagebitmap.md) | 是 | null | 图源对象，具体参考ImageBitmap对象。 |
| repetition | string | 是 | “” | 设置图像重复的方式，取值为：'repeat'、'repeat-x'、&nbsp;'repeat-y'、'no-repeat'。 | | repetition | string | 是 | “” | 设置图像重复的方式，取值为：'repeat'、'repeat-x'、&nbsp;'repeat-y'、'no-repeat'。 |
- 示例 **返回值：**
```
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [CanvasPattern](#canvaspattern) | 通过指定图像和重复方式创建图片填充的模板对象。 |
**示例：**
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreatePattern { struct CreatePattern {
...@@ -1225,7 +1282,8 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, ...@@ -1225,7 +1282,8 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number,
创建三次贝赛尔曲线的路径。 创建三次贝赛尔曲线的路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------------- | | ---- | ------ | ---- | ---- | -------------- |
| cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 | | cp1x | number | 是 | 0 | 第一个贝塞尔参数的x坐标值。 |
...@@ -1235,8 +1293,10 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, ...@@ -1235,8 +1293,10 @@ bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number,
| x | number | 是 | 0 | 路径结束时的x坐标值。 | | x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 | | y | number | 是 | 0 | 路径结束时的y坐标值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct BezierCurveTo { struct BezierCurveTo {
...@@ -1273,7 +1333,8 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void ...@@ -1273,7 +1333,8 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
创建二次贝赛尔曲线的路径。 创建二次贝赛尔曲线的路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------- | | ---- | ------ | ---- | ---- | ----------- |
| cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 | | cpx | number | 是 | 0 | 贝塞尔参数的x坐标值。 |
...@@ -1281,8 +1342,10 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void ...@@ -1281,8 +1342,10 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
| x | number | 是 | 0 | 路径结束时的x坐标值。 | | x | number | 是 | 0 | 路径结束时的x坐标值。 |
| y | number | 是 | 0 | 路径结束时的y坐标值。 | | y | number | 是 | 0 | 路径结束时的y坐标值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct QuadraticCurveTo { struct QuadraticCurveTo {
...@@ -1315,11 +1378,12 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void ...@@ -1315,11 +1378,12 @@ quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
### arc ### arc
arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, counterclockwise?: boolean): void
绘制弧线路径。 绘制弧线路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------------- | ------- | ---- | ----- | ---------- | | ------------- | ------- | ---- | ----- | ---------- |
| x | number | 是 | 0 | 弧线圆心的x坐标值。 | | x | number | 是 | 0 | 弧线圆心的x坐标值。 |
...@@ -1327,10 +1391,12 @@ arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, ...@@ -1327,10 +1391,12 @@ arc(x: number, y: number, radius: number, startAngle: number, endAngle: number,
| radius | number | 是 | 0 | 弧线的圆半径。 | | radius | number | 是 | 0 | 弧线的圆半径。 |
| startAngle | number | 是 | 0 | 弧线的起始弧度。 | | startAngle | number | 是 | 0 | 弧线的起始弧度。 |
| endAngle | number | 是 | 0 | 弧线的终止弧度。 | | endAngle | number | 是 | 0 | 弧线的终止弧度。 |
| anticlockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 | | counterclockwise | boolean | 否 | false | 是否逆时针绘制圆弧。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Arc { struct Arc {
...@@ -1366,7 +1432,8 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -1366,7 +1432,8 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
依据圆弧经过的点和圆弧半径创建圆弧路径。 依据圆弧经过的点和圆弧半径创建圆弧路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | --------------- | | ------ | ------ | ---- | ---- | --------------- |
| x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 | | x1 | number | 是 | 0 | 圆弧经过的第一个点的x坐标值。 |
...@@ -1375,8 +1442,10 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -1375,8 +1442,10 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
| y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 | | y2 | number | 是 | 0 | 圆弧经过的第二个点的y坐标值。 |
| radius | number | 是 | 0 | 圆弧的圆半径值。 | | radius | number | 是 | 0 | 圆弧的圆半径值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct ArcTo { struct ArcTo {
...@@ -1408,11 +1477,12 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void ...@@ -1408,11 +1477,12 @@ arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
### ellipse ### ellipse
ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, counterclockwise?: boolean): void
在规定的矩形区域绘制一个椭圆。 在规定的矩形区域绘制一个椭圆。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 说明 | | 参数 | 类型 | 必填 | 默认值 | 说明 |
| ------------- | ------- | ---- | ----- | ----------------- | | ------------- | ------- | ---- | ----- | ----------------- |
| x | number | 是 | 0 | 椭圆圆心的x轴坐标。 | | x | number | 是 | 0 | 椭圆圆心的x轴坐标。 |
...@@ -1422,11 +1492,12 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number ...@@ -1422,11 +1492,12 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number
| rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 | | rotation | number | 是 | 0 | 椭圆的旋转角度，单位为弧度。 |
| startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 | | startAngle | number | 是 | 0 | 椭圆绘制的起始点角度，以弧度表示。 |
| endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 | | endAngle | number | 是 | 0 | 椭圆绘制的结束点角度，以弧度表示。 |
| anticlockwise | boolean | 否 | false | 是否以逆时针方向绘制椭圆。 | | counterclockwise | boolean | 否 | false | 是否以逆时针方向绘制椭圆。 |
- 示例 **示例：**
``` ```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
...@@ -1458,20 +1529,23 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number ...@@ -1458,20 +1529,23 @@ ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number
### rect ### rect
rect(x: number, y: number, width: number, height: number): void rect(x: number, y: number, w: number, h: number): void
创建矩形路径。 创建矩形路径。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ------------- | | ------ | ------ | ---- | ---- | ------------- |
| x | number | 是 | 0 | 指定矩形的左上角x坐标值。 | | x | number | 是 | 0 | 指定矩形的左上角x坐标值。 |
| y | number | 是 | 0 | 指定矩形的左上角y坐标值。 | | y | number | 是 | 0 | 指定矩形的左上角y坐标值。 |
| width | number | 是 | 0 | 指定矩形的宽度。 | | w | number | 是 | 0 | 指定矩形的宽度。 |
| height | number | 是 | 0 | 指定矩形的高度。 | | h | number | 是 | 0 | 指定矩形的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
...@@ -1506,8 +1580,10 @@ fill(): void ...@@ -1506,8 +1580,10 @@ fill(): void
对封闭路径进行填充。 对封闭路径进行填充。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Fill { struct Fill {
...@@ -1542,8 +1618,10 @@ clip(): void ...@@ -1542,8 +1618,10 @@ clip(): void
设置当前路径为剪切路径。 设置当前路径为剪切路径。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Clip { struct Clip {
...@@ -1577,17 +1655,20 @@ clip(): void ...@@ -1577,17 +1655,20 @@ clip(): void
### rotate ### rotate
rotate(rotate: number): void rotate(angle: number): void
针对当前坐标轴进行顺时针旋转。 针对当前坐标轴进行顺时针旋转。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------ | ------ | ---- | ---- | ---------------------------------------- | | ------ | ------ | ---- | ---- | ---------------------------------------- |
| rotate | number | 是 | 0 | 设置顺时针旋转的弧度值，可以通过Math.PI&nbsp;/&nbsp;180将角度转换为弧度值。 | | angle | number | 是 | 0 | 设置顺时针旋转的弧度值，可以通过Math.PI&nbsp;/&nbsp;180将角度转换为弧度值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Rotate { struct Rotate {
...@@ -1622,14 +1703,17 @@ scale(x: number, y: number): void ...@@ -1622,14 +1703,17 @@ scale(x: number, y: number): void
设置canvas画布的缩放变换属性，后续的绘制操作将按照缩放比例进行缩放。 设置canvas画布的缩放变换属性，后续的绘制操作将按照缩放比例进行缩放。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------- | | ---- | ------ | ---- | ---- | ----------- |
| x | number | 是 | 0 | 设置水平方向的缩放值。 | | x | number | 是 | 0 | 设置水平方向的缩放值。 |
| y | number | 是 | 0 | 设置垂直方向的缩放值。 | | y | number | 是 | 0 | 设置垂直方向的缩放值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Scale { struct Scale {
...@@ -1661,29 +1745,32 @@ scale(x: number, y: number): void ...@@ -1661,29 +1745,32 @@ scale(x: number, y: number): void
### transform ### transform
transform(scaleX: number, skewX: number, skewY: number, scaleY: number, translateX: number, translateY: number): void transform(a: number, b: number, c: number, d: number, e: number, f: number): void
transform方法对应一个变换矩阵，想对一个图形进行变化的时候，只要设置此变换矩阵相应的参数，对图形的各个定点的坐标分别乘以这个矩阵，就能得到新的定点的坐标。矩阵变换效果可叠加。 transform方法对应一个变换矩阵，想对一个图形进行变化的时候，只要设置此变换矩阵相应的参数，对图形的各个定点的坐标分别乘以这个矩阵，就能得到新的定点的坐标。矩阵变换效果可叠加。
> **说明：** > ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> 变换后的坐标计算方式（x和y为变换前坐标，x'和y'为变换后坐标）： > 变换后的坐标计算方式（x和y为变换前坐标，x'和y'为变换后坐标）：
> >
> - x' = scaleX \* x + skewY \* y + translateX > - x' = scaleX \* x + skewY \* y + translateX
> >
> - y' = skewX \* x + scaleY \* y + translateY > - y' = skewX \* x + scaleY \* y + translateY
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ------ | ---- | ---- | -------- | | ---------- | ------ | ---- | ---- | -------- |
| scaleX | number | 是 | 0 | 指定水平缩放值。 | | a | number | 是 | 0 |scaleX: 指定水平缩放值。 |
| skewX | number | 是 | 0 | 指定水平倾斜值。 | | b | number | 是 | 0 |skewX: 指定水平倾斜值。 |
| skewY | number | 是 | 0 | 指定垂直倾斜值。 | | c | number | 是 | 0 |skewY: 指定垂直倾斜值。 |
| scaleY | number | 是 | 0 | 指定垂直缩放值。 | | d | number | 是 | 0 |scaleY: 指定垂直缩放值。 |
| translateX | number | 是 | 0 | 指定水平移动值。 | | e | number | 是 | 0 |translateX: 指定水平移动值。 |
| translateY | number | 是 | 0 | 指定垂直移动值。 | | f | number | 是 | 0 |translateY: 指定垂直移动值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Transform { struct Transform {
...@@ -1720,22 +1807,25 @@ transform方法对应一个变换矩阵，想对一个图形进行变化的时 ...@@ -1720,22 +1807,25 @@ transform方法对应一个变换矩阵，想对一个图形进行变化的时
### setTransform ### setTransform
setTransform(scaleX: number, skewX: number, skewY: number, scale: number, translateX: number, translateY: number): void setTransform(a: number, b: number, c: number, d: number, e: number, f: number): void
setTransfrom方法使用的参数和transform()方法相同，但setTransform()方法会重置现有的变换矩阵并创建新的变换矩阵。 setTransfrom方法使用的参数和transform()方法相同，但setTransform()方法会重置现有的变换矩阵并创建新的变换矩阵。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---------- | ------ | ---- | ---- | -------- | | ---------- | ------ | ---- | ---- | -------- |
| scaleX | number | 是 | 0 | 指定水平缩放值。 | | a | number | 是 | 0 |scaleX: 指定水平缩放值。 |
| skewX | number | 是 | 0 | 指定水平倾斜值。 | | b | number | 是 | 0 |skewX: 指定水平倾斜值。 |
| skewY | number | 是 | 0 | 指定垂直倾斜值。 | | c | number | 是 | 0 |skewY: 指定垂直倾斜值。 |
| scaleY | number | 是 | 0 | 指定垂直缩放值。 | | d | number | 是 | 0 |scaleY: 指定垂直缩放值。 |
| translateX | number | 是 | 0 | 指定水平移动值。 | | e | number | 是 | 0 |translateX: 指定水平移动值。 |
| translateY | number | 是 | 0 | 指定垂直移动值。 | | f | number | 是 | 0 |translateY: 指定垂直移动值。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct SetTransform { struct SetTransform {
...@@ -1773,14 +1863,17 @@ translate(x: number, y: number): void ...@@ -1773,14 +1863,17 @@ translate(x: number, y: number): void
移动当前坐标系的原点。 移动当前坐标系的原点。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------- | | ---- | ------ | ---- | ---- | -------- |
| x | number | 是 | 0 | 设置水平平移量。 | | x | number | 是 | 0 | 设置水平平移量。 |
| y | number | 是 | 0 | 设置竖直平移量。 | | y | number | 是 | 0 | 设置竖直平移量。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Translate { struct Translate {
...@@ -1814,28 +1907,31 @@ translate(x: number, y: number): void ...@@ -1814,28 +1907,31 @@ translate(x: number, y: number): void
drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number): void drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number): void
drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number, dWidth: number, dHeight: number): void drawImage(image: ImageBitmap | PixelMap, dx: number, dy: number, dw: number, dh: number): void
drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number, sHeight: number, dx: number, dy: number, dWidth: number, dHeight: number):void drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sw: number, sh: number, dx: number, dy: number, dw: number, dh: number):void
进行图像绘制。 进行图像绘制。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ------- | ---------------------------------------- | ---- | ---- | -------------------- | | ------- | ---------------------------------------- | ---- | ---- | -------------------- |
| image | [ImageBitmap](ts-components-canvas-imagebitmap.md) 或[PixelMap](../apis/js-apis-image.md#pixelmap7)| 是 | null | 图片资源，请参考ImageBitmap或PixelMap。 | | image | [ImageBitmap](ts-components-canvas-imagebitmap.md) 或[PixelMap](../apis/js-apis-image.md#pixelmap7)| 是 | null | 图片资源，请参考ImageBitmap或PixelMap。 |
| sx | number | 否 | 0 | 裁切源图像时距离源图像左上角的x坐标值。 | | sx | number | 否 | 0 | 裁切源图像时距离源图像左上角的x坐标值。 |
| sy | number | 否 | 0 | 裁切源图像时距离源图像左上角的y坐标值。 | | sy | number | 否 | 0 | 裁切源图像时距离源图像左上角的y坐标值。 |
| sWidth | number | 否 | 0 | 裁切源图像时需要裁切的宽度。 | | sw | number | 否 | 0 | 裁切源图像时需要裁切的宽度。 |
| sHeight | number | 否 | 0 | 裁切源图像时需要裁切的高度。 | | sh | number | 否 | 0 | 裁切源图像时需要裁切的高度。 |
| dx | number | 是 | 0 | 绘制区域左上角在x轴的位置。 | | dx | number | 是 | 0 | 绘制区域左上角在x轴的位置。 |
| dy | number | 是 | 0 | 绘制区域左上角在y&nbsp;轴的位置。 | | dy | number | 是 | 0 | 绘制区域左上角在y&nbsp;轴的位置。 |
| dWidth | number | 否 | 0 | 绘制区域的宽度。 | | dw | number | 否 | 0 | 绘制区域的宽度。 |
| dHeight | number | 否 | 0 | 绘制区域的高度。 | | dh | number | 否 | 0 | 绘制区域的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct Index { struct Index {
...@@ -1866,34 +1962,44 @@ drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number, ...@@ -1866,34 +1962,44 @@ drawImage(image: ImageBitmap | PixelMap, sx: number, sy: number, sWidth: number,
### createImageData ### createImageData
createImageData(width: number, height: number): Object createImageData(sw: number, sh: number): ImageData
根据宽高创建ImageData对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。 根据宽高创建ImageData对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认 | 描述 | | 参数 | 类型 | 必填 | 默认 | 描述 |
| ------ | ------ | ---- | ---- | ------------- | | ------ | ------ | ---- | ---- | ------------- |
| width | number | 是 | 0 | ImageData的宽度。 | | sw | number | 是 | 0 | ImageData的宽度。 |
| height | number | 是 | 0 | ImageData的高度。 | | sh | number | 是 | 0 | ImageData的高度。 |
### createImageData ### createImageData
createImageData(imageData: ImageData): Object createImageData(imageData: ImageData): ImageData
根据已创建的ImageData对象创建新的ImageData对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。 根据已创建的ImageData对象创建新的ImageData对象，请参考[ImageData](ts-components-canvas-imagebitmap.md)。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认 | 描述 | | 参数 | 类型 | 必填 | 默认 | 描述 |
| --------- | ---------------------------------------- | ---- | ---- | ---------------- | | --------- | ---------------------------------------- | ---- | ---- | ---------------- |
| imagedata | [ImageData](ts-components-canvas-imagebitmap.md) | 是 | null | 被复制的ImageData对象。 | | imagedata | [ImageData](ts-components-canvas-imagebitmap.md) | 是 | null | 被复制的ImageData对象。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [ImageData](ts-components-canvas-imagebitmap.md) | 新的ImageData对象 |
### getPixelMap ### getPixelMap
getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap
以当前canvas指定区域内的像素创建[PixelMap](../apis/js-apis-image.md#pixelmap7)对象。 以当前canvas指定区域内的像素创建[PixelMap](../apis/js-apis-image.md#pixelmap7)对象。
- 参数
**参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| -------- | -------- | -------- | -------- | -------- | | -------- | -------- | -------- | -------- | -------- |
| sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 | | sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 |
...@@ -1901,13 +2007,21 @@ getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap ...@@ -1901,13 +2007,21 @@ getPixelMap(sx: number, sy: number, sw: number, sh: number): PixelMap
| sw | number | 是 | 0 | 需要输出的区域的宽度。 | | sw | number | 是 | 0 | 需要输出的区域的宽度。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 | | sh | number | 是 | 0 | 需要输出的区域的高度。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [PixelMap](../apis/js-apis-image.md#pixelmap7) | 新的PixelMap对象 |
### getImageData ### getImageData
getImageData(sx: number, sy: number, sw: number, sh: number): Object getImageData(sx: number, sy: number, sw: number, sh: number): ImageData
以当前canvas指定区域内的像素创建[ImageData](ts-components-canvas-imagebitmap.md)对象。 以当前canvas指定区域内的像素创建[ImageData](ts-components-canvas-imagebitmap.md)对象。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | --------------- | | ---- | ------ | ---- | ---- | --------------- |
| sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 | | sx | number | 是 | 0 | 需要输出的区域的左上角x坐标。 |
...@@ -1915,14 +2029,23 @@ getImageData(sx: number, sy: number, sw: number, sh: number): Object ...@@ -1915,14 +2029,23 @@ getImageData(sx: number, sy: number, sw: number, sh: number): Object
| sw | number | 是 | 0 | 需要输出的区域的宽度。 | | sw | number | 是 | 0 | 需要输出的区域的宽度。 |
| sh | number | 是 | 0 | 需要输出的区域的高度。 | | sh | number | 是 | 0 | 需要输出的区域的高度。 |
**返回值：**
| 类型 | 说明 |
| ---------- | ---------------------------------------- |
| [ImageData](ts-components-canvas-imagebitmap.md) | 新的ImageData对象 |
### putImageData ### putImageData
putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void putImageData(imageData: Object, dx: number, dy: number): void
putImageData(imageData: Object, dx: number, dy: number, dirtyX: number, dirtyY: number, dirtyWidth?: number, dirtyHeight: number): void
使用[ImageData](ts-components-canvas-imagebitmap.md)数据填充新的矩形区域。 使用[ImageData](ts-components-canvas-imagebitmap.md)数据填充新的矩形区域。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ----------- | ------ | ---- | ------------ | ----------------------------- | | ----------- | ------ | ---- | ------------ | ----------------------------- |
| imagedata | Object | 是 | null | 包含像素值的ImageData对象。 | | imagedata | Object | 是 | null | 包含像素值的ImageData对象。 |
...@@ -1933,8 +2056,10 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY? ...@@ -1933,8 +2056,10 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?
| dirtyWidth | number | 否 | imagedata的宽度 | 源图像数据矩形裁切范围的宽度。 | | dirtyWidth | number | 否 | imagedata的宽度 | 源图像数据矩形裁切范围的宽度。 |
| dirtyHeight | number | 否 | imagedata的高度 | 源图像数据矩形裁切范围的高度。 | | dirtyHeight | number | 否 | imagedata的高度 | 源图像数据矩形裁切范围的高度。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct PutImageData { struct PutImageData {
...@@ -1968,6 +2093,225 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY? ...@@ -1968,6 +2093,225 @@ putImageData(imageData: Object, dx: number, dy: number, dirtyX?: number, dirtyY?
![zh-cn_image_0000001194192464](figures/zh-cn_image_0000001194192464.png) ![zh-cn_image_0000001194192464](figures/zh-cn_image_0000001194192464.png)
### setLineDash
setLineDash(segments: number[]): void
设置画布的虚线样式。
**参数：**
| 参数 | 类型 | 描述 |
| -------- | ----- | -------------------- |
| segments | number[] | 描述线段如何交替和线段间距长度的数组。 |
**示例：**
```ts
@Entry
@Component
struct SetLineDash {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
this.offContext.arc(100, 75, 50, 0, 6.28)
this.offContext.setLineDash([10,20])
this.offContext.stroke();
var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image)
})
}
.width('100%')
.height('100%')
}
}
```
![zh-cn_image_000000127777772](figures/zh-cn_image_000000127777772.png)
### getLineDash
getLineDash(): number[]
获得当前画布的虚线样式。
**返回值：**
| 类型 | 说明 |
| ----- | ------------------------ |
| number[] | 返回数组，该数组用来描述线段如何交替和间距长度。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct GetLineDash {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
var grad = this.context.createLinearGradient(50,0, 300,100)
this.offContext.arc(100, 75, 50, 0, 6.28)
this.offContext.setLineDash([10,20])
this.offContext.stroke();
let res = this.offContext.getLineDash()
var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image)
})
}
.width('100%')
.height('100%')
}
}
```
### transferFromImageBitmap
transferFromImageBitmap(bitmap: ImageBitmap): void
显示给定的ImageBitmap对象。
**参数：**
| 参数 | 类型 | 描述 |
| ------ | ----------- | ------------------ |
| bitmap | [ImageData](ts-components-canvas-imagebitmap.md) | 待显示的ImageBitmap对象。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct GetLineDash {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
this.offContext.fillRect(0, 0, 200, 200)
var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image)
})
}
.width('100%')
.height('100%')
}
}
```
![zh-cn_image_000000127777773](figures/zh-cn_image_000000127777773.png)
### toDataURL
toDataURL(type?: string, quality?: number): string
生成一个包含图片展示的URL。
**参数：**
| 参数名 | 参数类型 | 必填 | 描述 |
| ------- | ------ | ---- | ---------------------------------------- |
| type | string | 否 | 可选参数，用于指定图像格式，默认格式为image/png。 |
| quality | number | 否 | 在指定图片格式为image/jpeg或image/webp的情况下，可以从0到1的区间内选择图片的质量。如果超出取值范围，将会使用默认值0.92。 |
**返回值：**
| 类型 | 说明 |
| ------ | --------- |
| string | 图像的URL地址。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct ToDataURL {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
var dataURL = this.offContext.toDataURL();
})
}
.width('100%')
.height('100%')
}
}
```
### transferToImageBitmap
transferToImageBitmap(): ImageBitmap
在离屏画布最近渲染的图像上创建一个ImageBitmap对象。
**返回值：**
| 类型 | 说明 |
| ---------------------------------------- | --------------- |
| [ImageData](ts-components-canvas-imagebitmap.md)| 存储离屏画布上渲染的像素数据。 |
**示例：**
```ts
// xxx.ets
@Entry
@Component
struct CanvasExample {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
private offContext: OffscreenCanvasRenderingContext2D = new OffscreenCanvasRenderingContext2D(600, 600, this.settings)
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Canvas(this.context)
.width('100%')
.height('100%')
.backgroundColor('#ffff00')
.onReady(() =>{
this.offContext.restore()
var image = this.offContext.transferToImageBitmap()
this.context.transferFromImageBitmap(image)
})
}
.width('100%')
.height('100%')
}
}
```
### restore ### restore
...@@ -1975,8 +2319,10 @@ restore(): void ...@@ -1975,8 +2319,10 @@ restore(): void
对保存的绘图上下文进行恢复。 对保存的绘图上下文进行恢复。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
...@@ -2008,8 +2354,10 @@ save(): void ...@@ -2008,8 +2354,10 @@ save(): void
对当前的绘图上下文进行保存。 对当前的绘图上下文进行保存。
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CanvasExample { struct CanvasExample {
...@@ -2041,7 +2389,8 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void ...@@ -2041,7 +2389,8 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void
创建一个线性渐变色。 创建一个线性渐变色。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | -------- | | ---- | ------ | ---- | ---- | -------- |
| x0 | number | 是 | 0 | 起点的x轴坐标。 | | x0 | number | 是 | 0 | 起点的x轴坐标。 |
...@@ -2049,8 +2398,10 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void ...@@ -2049,8 +2398,10 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void
| x1 | number | 是 | 0 | 终点的x轴坐标。 | | x1 | number | 是 | 0 | 终点的x轴坐标。 |
| y1 | number | 是 | 0 | 终点的y轴坐标。 | | y1 | number | 是 | 0 | 终点的y轴坐标。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreateLinearGradient { struct CreateLinearGradient {
...@@ -2090,7 +2441,8 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, ...@@ -2090,7 +2441,8 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
创建一个径向渐变色。 创建一个径向渐变色。
- 参数 **参数：**
| 参数 | 类型 | 必填 | 默认值 | 描述 | | 参数 | 类型 | 必填 | 默认值 | 描述 |
| ---- | ------ | ---- | ---- | ----------------- | | ---- | ------ | ---- | ---- | ----------------- |
| x0 | number | 是 | 0 | 起始圆的x轴坐标。 | | x0 | number | 是 | 0 | 起始圆的x轴坐标。 |
...@@ -2100,8 +2452,10 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, ...@@ -2100,8 +2452,10 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
| y1 | number | 是 | 0 | 终点圆的y轴坐标。 | | y1 | number | 是 | 0 | 终点圆的y轴坐标。 |
| r1 | number | 是 | 0 | 终点圆的半径。必须为非负且有限的。 | | r1 | number | 是 | 0 | 终点圆的半径。必须为非负且有限的。 |
- 示例 **示例：**
```
```ts
// xxx.ets
@Entry @Entry
@Component @Component
struct CreateRadialGradient { struct CreateRadialGradient {
......
zh-cn/application-dev/reference/arkui-ts/ts-universal-events-key.md
浏览文件 @ 3bc24b2e
...@@ -21,23 +21,16 @@ ...@@ -21,23 +21,16 @@
## KeyEvent对象说明 ## KeyEvent对象说明
### 属性 | 名称 | 类型 | 描述 |
| ------------------------------------- | --------------------------- | -------------------------- |
| 属性名称 | 类型 | 描述 | | type | [KeyType](ts-appendix-enums.md#keytype) | 按键的类型。 |
| ------------------------------------- | --------------------------- | -------------------------- | | [keyCode](../apis/js-apis-keycode.md) | number | 按键的键码。 |
| type | [KeyType](ts-appendix-enums.md#keytype) | 按键的类型。 | | keyText | string | 按键的键值。 |
| [keyCode](../apis/js-apis-keycode.md) | number | 按键的键码。 | | keySource | [KeySource](ts-appendix-enums.md#keysource) | 触发当前按键的输入设备类型。 |
| keyText | string | 按键的键值。 | | deviceId | number | 触发当前按键的输入设备ID。 |
| keySource | [KeySource](ts-appendix-enums.md#keysource) | 触发当前按键的输入设备类型。 | | metaKey | number | 按键发生时元键的状态，1表示按压态，0表示未按压态。 |
| deviceId | number | 触发当前按键的输入设备ID。 | | timestamp | number | 按键发生时的时间戳。 |
| metaKey | number | 按键发生时元键的状态，1表示按压态，0表示未按压态。 | | stopPropagation | () => void | 阻塞事件冒泡传递。 |
| timestamp | number | 按键发生时的时间戳。 |
### 接口
| 接口名称 | 功能描述 |
| ---------------------------- | --------- |
| stopPropagation():&nbsp;void | 阻塞事件冒泡传递。 |
## 示例 ## 示例
......
zh-cn/application-dev/reference/arkui-ts/ts-universal-events-touch.md
浏览文件 @ 3bc24b2e
...@@ -14,24 +14,20 @@ ...@@ -14,24 +14,20 @@
## TouchEvent对象说明 ## TouchEvent对象说明
### 属性 | 名称 | 类型 | 描述 |
| ------------------- | ---------------------------------------- | ------------ |
| type | [TouchType](ts-appendix-enums.md#touchtype) | 触摸事件的类型。 |
| touches | Array&lt;[TouchObject](#touchobject对象说明)&gt; | 全部手指信息。 |
| changedTouches | Array&lt;[TouchObject](#touchobject对象说明)&gt; | 当前发生变化的手指信息。 |
| stopPropagation | () => void | 阻塞事件冒泡。 |
| timestamp<sup>8+</sup> | number | 事件时间戳。 |
| target<sup>8+</sup> | [EventTarget](ts-universal-events-click.md) | 触发手势事件的元素对象显示区域。 |
| source<sup>8+</sup> | [SourceType](ts-gesture-settings.md) | 事件输入设备。 |
| 属性名称 | 类型 | 描述 |
| ------------------- | ------------------------------------------------------------ | ---------------------------------- |
| type | [TouchType](ts-appendix-enums.md#touchtype) | 触摸事件的类型。 |
| touches | Array&lt;[TouchObject](#touchobject对象说明)&gt; | 全部手指信息。 |
| changedTouches | Array&lt;[TouchObject](#touchobject对象说明)&gt; | 当前发生变化的手指信息。 |
| timestamp | number | 距离开机时间的时间戳，单位为毫秒。 |
| target<sup>8+</sup> | [EventTarget](ts-universal-events-click.md#eventtarget8对象说明) | 被触摸元素对象。 |
### 接口
| 接口名称 | 功能描述 |
| ---------------------- | ------- |
| stopPropagation()：void | 阻塞事件冒泡。 |
## TouchObject对象说明 ## TouchObject对象说明
| 属性名称 | 类型 | 描述 |
| 名称 | 类型 | 描述 |
| ------- | --------------------------- | ------------------- | | ------- | --------------------------- | ------------------- |
| type | [TouchType](ts-appendix-enums.md#touchtype) | 触摸事件的类型。 | | type | [TouchType](ts-appendix-enums.md#touchtype) | 触摸事件的类型。 |
| id | number | 手指唯一标识符。 | | id | number | 手指唯一标识符。 |
......
zh-cn/application-dev/reference/arkui-ts/ts-universal-mouse-key.md
浏览文件 @ 3bc24b2e
...@@ -14,15 +14,19 @@ ...@@ -14,15 +14,19 @@
## MouseEvent对象说明 ## MouseEvent对象说明
| 属性名称 | 属性类型 | 描述 |
| 名称 | 属性类型 | 描述 |
| --------- | ------------------------------- | -------------------- | | --------- | ------------------------------- | -------------------- |
| timestamp | number | 触发事件时的时间戳。 |
| screenX | number | 点击触点相对于屏幕左上角的x轴坐标。 | | screenX | number | 点击触点相对于屏幕左上角的x轴坐标。 |
| screenY | number | 点击触点相对于屏幕左上角的y轴坐标。 | | screenY | number | 点击触点相对于屏幕左上角的y轴坐标。 |
| x | number | 点击触点相对于当前组件左上角的x轴坐标。 | | x | number | 点击触点相对于当前组件左上角的x轴坐标。 |
| y | number | 点击触点相对于当前组件左上角的y轴坐标。 | | y | number | 点击触点相对于当前组件左上角的y轴坐标。 |
| button | [MouseButton](ts-appendix-enums.md#mousebutton) | 鼠标按键。 | | button | [MouseButton](ts-appendix-enums.md#mousebutton) | 鼠标按键。 |
| action | [MouseAction](ts-appendix-enums.md#mouseaction) | 事件动作。 | | action | [MouseAction](ts-appendix-enums.md#mouseaction) | 事件动作。 |
| stopPropagation | () => void | 阻塞事件冒泡。 |
| timestamp<sup>8+</sup> | number | 事件时间戳。 |
| target<sup>8+</sup> | [EventTarget](ts-universal-events-click.md) | 触发手势事件的元素对象显示区域。 |
| source<sup>8+</sup> | [SourceType](ts-gesture-settings.md) | 事件输入设备。 |
## 示例 ## 示例
......
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