# Touch Event A touch event is triggered when a finger is pressed, slides, or is lifted from a component. > **NOTE** > > This event is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version. ## Required Permissions None ## Events | Name | Bubbling Supported| Description | | ---------------------------------------- | ---- | ---------------------------------------- | | onTouch(callback: (event?: TouchEvent) => void) | Yes | Invoked when a touch action is triggered. For details about **event**, see [TouchEvent](#touchevent).| ## TouchEvent - Attributes | Name | Type | Description | | ------------------- | ---------------------------------------- | ------------ | | type | TouchType | Type of the touch event. | | touches | Array<[TouchObject](#touchobject)> | All finger information. | | changedTouches | Array<[TouchObject](#touchobject)> | Finger information changed.| | timestamp | number | Timestamp of the event. | | target8+ | [EventTarget](ts-universal-events-click.md#eventtarget8) | Target of the event. | - APIs | Name | Description | | ---------------------- | ------- | | stopPropagation(): void| Stops the event from bubbling upwards or downwards.| ## TouchObject | Name | Type | Description | | ------- | --------------------------- | ------------------- | | type | [TouchType](#touchtype-enums) | Type of the touch event. | | id | number | Unique identifier of a finger. | | screenX | number | X-coordinate of the touch point relative to the left edge of the screen. | | screenY | number | Y-coordinate of the touch point relative to the upper edge of the device screen. | | x | number | X-coordinate of the touch point relative to the left edge of the element being touched. | | y | number | Y-coordinate of the touch point relative to the upper edge of the element being touched. | ## TouchType Enums | Name | Description | | ------ | --------------- | | Down | A finger is pressed. | | Up | A finger is lifted. | | Move | A finger moves on the screen in pressed state.| | Cancel | A touch event is canceled. | ## Example ```ts // xxx.ets @Entry @Component struct TouchExample { @State text: string = '' @State eventType: string = '' build() { Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) { Button('Touch').backgroundColor(0x2788D9).height(40).width(80) .onTouch((event: TouchEvent) => { if (event.type === TouchType.Down) { this.eventType = 'Down' } if (event.type === TouchType.Up) { this.eventType = 'Up' } if (event.type === TouchType.Move) { this.eventType = 'Move' } console.info(this.text = 'TouchType:' + this.eventType + '\nDistance between touch point and touch element:\nx: ' + event.touches[0].x + '\n' + 'y: ' + event.touches[0].y + '\ncomponent globalPos:(' + event.target.area.globalPosition.x + ',' + event.target.area.globalPosition.y + ')\nwidth:' + event.target.area.width + '\nheight:' + event.target.area.height) }) Text(this.text) }.height(200).width(350).padding({ left: 35, right: 35, top: 35 }) } } ``` ![en-us_image_0000001212058464](figures/en-us_image_0000001212058464.gif)