harmony 鸿蒙Popup Control

2022-08-09
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Popup Control

You can bind a popup to a component, specifying its content, interaction logic, and display status.

NOTE

This attribute is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

APIs

Name	Type	Description
bindPopup	show: boolean, popup: PopupOptions \|CustomPopupOptions⁸⁺	Binds a popup to the component. show: whether to show the popup. The default value is false, indicating that the popup is hidden. As the popup can be displayed only after building of all pages is completed, show cannot be set to true during page building. Otherwise, the display position and shape of the popup will be incorrect. popup: parameters of the popup.

PopupOptions

Name	Type	Mandatory	Description
message	string	Yes	Content of the popup message.
placementOnTop^(deprecated)	boolean	No	Whether to display the popup above the component. Default value: false NOTE This API is deprecated since API version 10. You are advised to use placement instead.
primaryButton	{ value: string, action: () => void }	No	Primary button. value: text of the primary button in the popup. action: callback for clicking the primary button.
secondaryButton	{ value: string, action: () => void }	No	Secondary button. value: text of the secondary button in the popup. action: callback for clicking the secondary button.
onStateChange	(event: { isVisible: boolean }) => void	No	Callback for the popup status change event. isVisible: whether the popup is visible.
arrowOffset⁹⁺	Length	No	Offset of the popup arrow relative to the popup. When the arrow is at the top or bottom of the popup: The value 0 indicates that the arrow is located on the leftmost, and any other value indicates the distance from the arrow to the leftmost; the arrow is centered by default. When the arrow is on the left or right side of the popup: The value indicates the distance from the arrow to the top; the arrow is centered by default. When the popup is displayed on either edge of the screen, it will automatically deviate leftward or rightward to stay within the safe area. When the value is 0, the arrow always points to the bound component.
showInSubWindow⁹⁺	boolean	No	Whether to show the popup in the subwindow. Default value: false
mask¹⁰⁺	boolean \|ResourceColor	No	Whether to apply a mask to the popup. The value true means to apply a transparent mask to the popup, false means not to apply a mask to the popup, and a color value means to apply a mask in the corresponding color to the popup.
messageOptions¹⁰⁺	PopupMessageOptions	No	Parameters of the popup message.
targetSpace¹⁰⁺	Length	No	Space between the popup and the target.
placement¹⁰⁺	Placement	No	Position of the popup relative to the target. The default value is Placement.Bottom. If both placementOnTop and placement are set, the latter prevails.
offset¹⁰⁺	Position	No	Offset of the popup relative to the display position specified by placement. NOTE This parameter cannot be set in percentage.
enableArrow¹⁰⁺	boolean	No	Whether to display the arrow. Default value: true

PopupMessageOptions¹⁰⁺

Name	Type	Mandatory	Description
textColor	ResourceColor	No	Text color of the popup message.
font	Font	No	Font attributes of the popup message.

CustomPopupOptions⁸⁺

Name	Type	Mandatory	Description
builder	CustomBuilder	Yes	Popup builder. NOTE The popup attribute is a universal attribute. A custom popup does not support display of another popup. The position attribute cannot be used for the first-layer container under the builder. If the position attribute is used, the popup will not be displayed.
placement	Placement	No	Preferred position of the popup. If the set position is insufficient for holding the popup, it will be automatically adjusted. Default value: Placement.Bottom
popupColor	ResourceColor	No	Color of the popup. Default value: ’#4d4d4d’
enableArrow	boolean	No	Whether to display an arrow. Since API version 9, if the position set for the popup is not large enough, the arrow will not be displayed. For example, if placement is set to Left, but the popup height (80 vp) is less than the sum of the arrow width (32 vp) and diameter of popup rounded corner (48 vp), the arrow will not be displayed. Default value: true
autoCancel	boolean	No	Whether to automatically close the popup when an operation is performed on the page. Default value: true
onStateChange	(event: { isVisible: boolean }) => void	No	Callback for the popup status change event. isVisible: whether the popup is visible.
arrowOffset⁹⁺	Length	No	Offset of the popup arrow relative to the popup. When the arrow is at the top or bottom of the popup: The value 0 indicates that the arrow is located on the leftmost, and any other value indicates the distance from the arrow to the leftmost; the arrow is centered by default. When the arrow is on the left or right side of the popup: The value indicates the distance from the arrow to the top; the arrow is centered by default. When the popup is displayed on either edge of the screen, it will automatically deviate leftward or rightward to stay within the safe area. When the value is 0, the arrow always points to the bound component.
showInSubWindow⁹⁺	boolean	No	Whether to show the popup in the subwindow. The default value is false.
maskColor^(deprecated)	ResourceColor	No	Color of the popup mask. NOTE This parameter is deprecated since API version 10. You are advised to use mask instead.
mask¹⁰⁺	boolean \|ResourceColor	No	Whether to apply a mask to the popup. The value true means to apply a transparent mask to the popup, false means not to apply a mask to the popup, and a color value means to apply a mask in the corresponding color to the popup.
targetSpace¹⁰⁺	Length	No	Space between the popup and the target.
offset¹⁰⁺	Position	No	Offset of the popup relative to the display position specified by placement. NOTE This parameter cannot be set in percentage.

Example

Example 1

// xxx.ets
@Entry
@Component
struct PopupExample {
  @State handlePopup: boolean = false
  @State customPopup: boolean = false

  // Popup builder
  @Builder popupBuilder() {
    Row({ space: 2 }) {
      Image($r("app.media.image")).width(24).height(24).margin({ left: -5 })
      Text('Custom Popup').fontSize(10)
    }.width(100).height(50).padding(5)
  }

  build() {
    Flex({ direction: FlexDirection.Column }) {
      // PopupOptions for setting the popup
      Button('PopupOptions')
        .onClick(() => {
          this.handlePopup = !this.handlePopup
        })
        .bindPopup(this.handlePopup, {
          message: 'This is a popup with PopupOptions',
          placementOnTop: true,
          showInSubWindow:false,
          primaryButton: {
            value: 'confirm',
            action: () => {
              this.handlePopup = !this.handlePopup
              console.info('confirm Button click')
            }
          },
          // Secondary button
          secondaryButton: {
            value: 'cancel',
            action: () => {
              this.handlePopup = !this.handlePopup
              console.info('cancel Button click')
            }
          },
          onStateChange: (e) => {
            console.info(JSON.stringify(e.isVisible))
            if (!e.isVisible) {
              this.handlePopup = false
            }
          }
        })
        .position({ x: 100, y: 50 })


      // CustomPopupOptions for setting the popup
      Button('CustomPopupOptions')
        .onClick(() => {
          this.customPopup = !this.customPopup
        })
        .bindPopup(this.customPopup, {
          builder: this.popupBuilder,
          placement: Placement.Top,
          mask: {color:'0x33000000'},
          popupColor: Color.Yellow,
          enableArrow: true,
          showInSubWindow: false,
          onStateChange: (e) => {
            if (!e.isVisible) {
              this.customPopup = false
            }
          }
        })
        .position({ x: 80, y: 200 })
    }.width('100%').padding({ top: 5 })
  }
}

Example 2

// xxx.ets
@Entry
@Component
struct PopupExample {
  @State handlePopup: boolean = false

  build() {
    Column() {
      Button('PopupOptions')
        .onClick(() => {
          this.handlePopup = !this.handlePopup
        })
        .bindPopup(this.handlePopup, {
          message: 'This is a popup with PopupOptions',
          messageOptions: {
            textColor: Color.Red,
            font: {
              size: '14vp',
              style: FontStyle.Italic,
              weight: FontWeight.Bolder
            }
          },
          placement: Placement.Bottom,
          enableArrow: false,
          targetSpace: '15vp',
          onStateChange: (e) => {
            console.info(JSON.stringify(e.isVisible))
            if (!e.isVisible) {
              this.handlePopup = false
            }
          }
        })
    }.margin(20)
  }
}

Example 3

// xxx.ets
@Entry
@Component
struct PopupExample {
  @State customPopup: boolean = false

  // Popup builder
  @Builder popupBuilder() {
    Row() {
      Text('Custom Popup Message').fontSize(10)
    }.height(50).padding(5)
  }

  build() {
    Column() {
      // CustomPopupOptions for setting the popup
      Button('CustomPopupOptions')
        .onClick(() => {
          this.customPopup = !this.customPopup
        })
        .bindPopup(this.customPopup, {
          builder: this.popupBuilder,
          targetSpace: '15vp',
          enableArrow: false,
          onStateChange: (e) => {
            if (!e.isVisible) {
              this.customPopup = false
            }
          }
        })
    }.margin(20)
  }
}