# Panel


> **NOTE**<br>
> This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.


The **<Panel\>** component is a slidable panel that presents lightweight content with flexible sizes. It is a pop-up component.


## Required Permissions

None


## Child Components

This component can contain child components.


## APIs

Panel(value:{show:boolean})

- Parameters
  | Name | Type | Mandatory | Default Value | Description |
  | -------- | -------- | -------- | -------- | -------- |
  | show | boolean | Yes | - | Whether to show or hide the panel. |


## Attributes

| Name | Type | Default Value | Description |
| -------- | -------- | -------- | -------- |
| type | PanelType | PanelType.Foldable | Type of the panel. |
| mode | PanelMode | - | Initial status of the panel. |
| dragBar | boolean | true | Whether to enable a drag bar. The value **true** means to display the drag bar, and **false** means the opposite. |
| fullHeight | Length | - | Panel height in the **PanelMode.Full** mode. |
| halfHeight | Length | - | Panel height in the **PanelMode.Half** mode. The default value is half of the screen height. |
| miniHeight | Length | - | Panel height in the **PanelMode.Mini** mode. |

- PanelType enums
  | Name | Description |
  | -------- | -------- |
  | Minibar | A minibar panel that displays content in the minibar area or a large (fullscreen-like) area. |
  | Foldable | A foldable panel that displays permanent content in a large (fullscreen-like), medium-sized (halfscreen-like), or small area. |
  | Temporary | A temporary panel that displays content in a large (fullscreen-like) or medium-sized (halfscreen-like) area. |

- PanelMode enums
  | Name | Description |
  | -------- | -------- |
  | Mini | Display of a minibar or foldable panel in its minimum size. This attribute does not take effect for **temporary** panels. |
  | Half | Display of a foldable or temporary panel in a medium-sized (halfscreen-like) area. This attribute does not take effect for **minibar** panels. |
  | Full | Display of a panel in a large (fullscreen-like) area. |


## Events

| Name | Description |
| -------- | -------- |
| onChange(callback: (width: number, height: number, mode: PanelMode) =&gt; void) | Triggered when the panel status changes. The returned height value is the height of the content area. When the value of **dragbar** is **true**, the height of the panel is the drag bar height plus the height of the content area. |


## Example


```
@Entry
@Component
struct PanelExample {
  @State show: boolean = false

  build() {
    Column() {
      Text('2021-09-30    Today Calendar: 1.afternoon......Click for details')
        .width('90%').height(50).borderRadius(10)
        .backgroundColor(0xFFFFFF).padding({ left: 20 })
        .onClick(() => {
          this.show = !this.show
        })
      Panel(this.show) { // Display the agenda.
        Column() {
          Text('Today Calendar')
          Divider()
          Text('1. afternoon 4:00 The project meeting')
        }
      }
      .type(PanelType.Foldable).mode(PanelMode.Half)
      .dragBar(true) // The drag bar is enabled by default.
      .halfHeight(500) // The default value is half of the screen height.
      .onChange((width: number, height: number, mode: PanelMode) => {
        console.info(`width:${width},height:${height},mode:${mode}`)
      })
    }.width('100%').height('100%').backgroundColor(0xDCDCDC).padding({ top: 5 })
  }
}
```

![en-us_image_0000001256978381](figures/en-us_image_0000001256978381.gif)