harmony 鸿蒙CheckboxGroup

2022-08-09
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CheckboxGroup

The <CheckboxGroup> component is used to select or deselect all check boxes in a group.

NOTE

This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Not supported

APIs

CheckboxGroup(options?: { group?: string })

Creates a check box group so that you can select or deselect all check boxes in the group at the same time. Check boxes and the check box group that share a group name belong to the same group.

Since API version 9, this API is supported in ArkTS widgets.

Parameters

Name	Type	Mandatory	Description
group	string	No	Group name. NOTE If there are multiple check box groups with the same group name, only the first check box group takes effect.

Attributes

In addition to the universal attributes, the following attributes are supported.

Name	Type	Description
selectAll	boolean	Whether to select all. Default value: false Since API version 9, this API is supported in ArkTS widgets. NOTE If the select attribute is set for a <Checkbox> component in the same group, the setting of the <Checkbox> has a higher priority. Since API version 10, this attribute supports $$ for two-way binding of variables.
selectedColor	ResourceColor	Color of the selected check box. Since API version 9, this API is supported in ArkTS widgets.
unselectedColor¹⁰⁺	ResourceColor	Border color of the check box when it is not selected.
mark¹⁰⁺	MarkStyle	Internal icon style of the check box.

Events

In addition to the universal events, the following events are supported.

Name	Description
onChange (callback: (event: CheckboxGroupResult) => void )	Triggered when the selected status of the check box group or any check box wherein changes. Since API version 9, this API is supported in ArkTS widgets.

CheckboxGroupResult

Since API version 9, this API is supported in ArkTS widgets.

Name	Type	Description
name	Array<string>	Names of all the selected check boxes in the group.
status	SelectStatus	Selected status.

SelectStatus

Since API version 9, this API is supported in ArkTS widgets.

Name	Description
All	All check boxes in the group are selected.
Part	Some check boxes in the group are selected.
None	None of the check boxes in the group are selected.

MarkStyle¹⁰⁺

Name	Type	Mandatory	Default Value	Description
strokeColor	ResourceColor	No	Color.White	Color of the internal mark.
size	number \|string	No	-	Size of the internal mark, in vp. The default size is the same as the width of the check box group component. This parameter cannot be set in percentage. If it is set to an invalid value, the default value is used.
strokeWidth	number \|string	No	2	Stroke width of the internal mark, in vp. This parameter cannot be set in percentage. If it is set to an invalid value, the default value is used.

Example

Example 1

// xxx.ets
@Entry
@Component
struct CheckboxExample {
  build() {
    Scroll() {
      Column() {
        // Select All button
        Flex({ justifyContent: FlexAlign.Start, alignItems: ItemAlign.Center }) {
          CheckboxGroup({ group: 'checkboxGroup' })
            .selectedColor('#007DFF')
            .onChange((itemName: CheckboxGroupResult) => {
              console.info("checkbox group content" + JSON.stringify(itemName))
            })
          Text('Select All').fontSize(14).lineHeight(20).fontColor('#182431').fontWeight(500)
        }

        // Option 1
        Flex({ justifyContent: FlexAlign.Start, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox1', group: 'checkboxGroup' })
            .selectedColor('#007DFF')
            .onChange((value: boolean) => {
              console.info('Checkbox1 change is' + value)
            })
          Text('Checkbox1').fontSize(14).lineHeight(20).fontColor('#182431').fontWeight(500)
        }.margin({ left: 36 })

        // Option 2
        Flex({ justifyContent: FlexAlign.Start, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox2', group: 'checkboxGroup' })
            .selectedColor('#007DFF')
            .onChange((value: boolean) => {
              console.info('Checkbox2 change is' + value)
            })
          Text('Checkbox2').fontSize(14).lineHeight(20).fontColor('#182431').fontWeight(500)
        }.margin({ left: 36 })

        // Option 3
        Flex({ justifyContent: FlexAlign.Start, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox3', group: 'checkboxGroup' })
            .selectedColor('#007DFF')
            .onChange((value: boolean) => {
              console.info('Checkbox3 change is' + value)
            })
          Text('Checkbox3').fontSize(14).lineHeight(20).fontColor('#182431').fontWeight(500)
        }.margin({ left: 36 })
      }
    }
  }
}

checkboxGroup

Example 2

// xxx.ets
@Entry
@Component
struct Index {

  build() {
    Row() {
      Column() {
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          CheckboxGroup({ group: 'checkboxGroup' })
            .selectedColor(Color.Orange)
            .onChange((itemName: CheckboxGroupResult) => {
              console.info("checkbox group content" + JSON.stringify(itemName))
            })
            .mark({
              strokeColor:Color.Black,
              size: 40,
              strokeWidth: 5
            })
            .unselectedColor(Color.Red)
            .width(30)
            .height(30)
          Text('Select All').fontSize(20)
        }.margin({right:15})
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox1', group: 'checkboxGroup' })
            .selectedColor(0x39a2db)
            .onChange((value: boolean) => {
              console.info('Checkbox1 change is'+ value)
            })
            .mark({
              strokeColor:Color.Black,
              size: 50,
              strokeWidth: 5
            })
            .unselectedColor(Color.Red)
            .width(30)
            .height(30)
          Text('Checkbox1').fontSize(20)
        }
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox2', group: 'checkboxGroup' })
            .selectedColor(0x39a2db)
            .onChange((value: boolean) => {
              console.info('Checkbox2 change is' + value)
            })
            .width(30)
            .height(30)
          Text('Checkbox2').fontSize(20)
        }
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox3', group: 'checkboxGroup' })
            .selectedColor(0x39a2db)
            .onChange((value: boolean) => {
              console.info('Checkbox3 change is' + value)
            })
            .width(30)
            .height(30)
          Text('Checkbox3').fontSize(20)
        }
      }
      .width('100%')
    }
    .height('100%')
  }
}

checkboxGroup