Custom Dialog Box

A custom dialog box is a dialog box you customize by using APIs of the CustomDialogController class. You can set the style and content to your preference for a custom dialog box.

NOTE

The APIs of this module are supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

APIs

CustomDialogController(value:{builder: CustomDialog, cancel?: () => void, autoCancel?: boolean, alignment?: DialogAlignment, offset?: Offset, customStyle?: boolean, gridCount?: number, maskColor?: ResourceColor, openAnimation?: AnimateParam, closeAniamtion?: AnimateParam, showInSubWindow?: boolean})

Parameters

Name	Type	Mandatory	Description
builder	CustomDialog	Yes	Constructor of the custom dialog box content.
cancel	() => void	No	Callback invoked when the dialog box is closed after the overlay exits.
autoCancel	boolean	No	Whether to allow users to click the overlay to exit. Default value: true
alignment	DialogAlignment	No	Alignment mode of the dialog box in the vertical direction. Default value: DialogAlignment.Default
offset	Offset	No	Offset of the dialog box relative to the alignment position.
customStyle	boolean	No	Whether to use a custom style for the dialog box. Default value: false, which means that the dialog box automatically adapts its width to the grid system and its height to the child components; the maximum height is 90% of the container height; the rounded corner is 24 vp.
gridCount⁸⁺	number	No	Number of grid columns occupied by the dialog box. The default value is 4, and the maximum value is the maximum number of columns supported by the system. If this parameter is set to an invalid value, the default value is used.

CustomDialogController

Objects to Import

dialogController : CustomDialogController = new CustomDialogController(value:{builder: CustomDialog, cancel?: () => void, autoCancel?: boolean})

NOTE

CustomDialogController is valid only when it is a member variable of the @CustomDialog and @Component decorated struct and is defined in the @Component decorated struct. For details, see the following example.

open()

open(): void

Opens the content of the custom dialog box. If the content has been displayed, this API does not take effect.

close

close(): void

Closes the custom dialog box. If the dialog box is closed, this API does not take effect.

Example

// xxx.ets
@CustomDialog
struct CustomDialogExample {
  @Link textValue: string
  @Link inputValue: string
  controller: CustomDialogController
  cancel: () => void
  confirm: () => void

  build() {
    Column() {
      Text('Change text').fontSize(20).margin({ top: 10, bottom: 10 })
      TextInput({ placeholder: '', text: this.textValue }).height(60).width('90%')
        .onChange((value: string) => {
          this.textValue = value
        })
      Text('Whether to change a text?').fontSize(16).margin({ bottom: 10 })
      Flex({ justifyContent: FlexAlign.SpaceAround }) {
        Button('cancel')
          .onClick(() => {
            this.controller.close()
            this.cancel()
          }).backgroundColor(0xffffff).fontColor(Color.Black)
        Button('confirm')
          .onClick(() => {
            this.inputValue = this.textValue
            this.controller.close()
            this.confirm()
          }).backgroundColor(0xffffff).fontColor(Color.Red)
      }.margin({ bottom: 10 })
    }
  }
}

@Entry
@Component
struct CustomDialogUser {
  @State textValue: string = ''
  @State inputValue: string = 'click me'
  dialogController: CustomDialogController = new CustomDialogController({
    builder: CustomDialogExample({
      cancel: this.onCancel,
      confirm: this.onAccept,
      textValue: $textValue,
      inputValue: $inputValue
    }),
    cancel: this.existApp,
    autoCancel: true,
    alignment: DialogAlignment.Default,
    offset: { dx: 0, dy: -20 },
    gridCount: 4,
    customStyle: false
  })

  aboutToDisappear() {
    delete this.dialogController,
    this.dialogController = undefined
  }

  onCancel() {
    console.info('Callback when the first button is clicked')
  }

  onAccept() {
    console.info('Callback when the second button is clicked')
  }

  existApp() {
    console.info('Click the callback in the blank area')
  }

  build() {
    Column() {
      Button(this.inputValue)
        .onClick(() => {
          if (this.dialogController != undefined) {
            this.dialogController.open()
          }
        }).backgroundColor(0x317aff)
    }.width('100%').margin({ top: 5 })
  }
}

en-us_image_0000001212058470