# 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?: CheckboxGroupOptions)

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

When this API is used with components that come with a pre-loading mechanism, such as the **List** component, those check boxes that have not been created yet need to be manually selected or unselected.

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                                                 | Mandatory | Description                |
| ------- | ----------------------------------------------------- | ---- | -------------------- |
| options | [CheckboxGroupOptions](#checkboxgroupoptions)  | No  | Check box group parameters. |

## CheckboxGroupOptions

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

| Name | Type | Mandatory | Description |
| -------- | -------- | -------- | -------- |
| group | string | No | Group name.<br>**NOTE**<br>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](ts-universal-attributes-size.md), the following attributes are supported.

### selectAll

selectAll(value: boolean)

Sets whether to select all. If the **select** attribute is set for a [Checkbox](ts-basic-components-checkbox.md) component in the same group, the setting of the **Checkbox** has a higher priority.

Since API version 10, this attribute supports two-way binding through [$$](../../../quick-start/arkts-two-way-sync.md).

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type   | Mandatory | Description                        |
| ------ | ------- | ---- | ---------------------------- |
| value  | boolean | Yes  | Whether to select all.<br>Default value: **false** |

### selectedColor

selectedColor(value: ResourceColor)

Sets the color of the selected check box.

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                                      | Mandatory | Description                                                        |
| ------ | ------------------------------------------ | ---- | ------------------------------------------------------------ |
| value  | [ResourceColor](ts-types.md#resourcecolor) | Yes  | Color of the selected check box.<br>Default value: **$r('sys.color.ohos_id_color_text_primary_activated')**<br>An invalid value is handled as the default value. |

### unselectedColor<sup>10+</sup>

unselectedColor(value: ResourceColor)

Sets the border color of the check box when it is not selected.

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                                      | Mandatory | Description                |
| ------ | ------------------------------------------ | ---- | -------------------- |
| value  | [ResourceColor](ts-types.md#resourcecolor) | Yes  | Border color of the check box when it is not selected.<br>Default value: **'#33ffffff'** |

### mark<sup>10+</sup>

mark(value: MarkStyle)

Sets the mark style of the check box.

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                             | Mandatory | Description                |
| ------ | --------------------------------- | ---- | -------------------- |
| value  | [MarkStyle](ts-types.md#markstyle10) | Yes  | Mark style of the check box. |

### checkboxShape<sup>12</sup>

checkboxShape(value: CheckBoxShape)

Sets the shape of the check box group.

**Widget capability**: This API can be used in ArkTS widgets since API version 12.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                                               | Mandatory | Description              |
| ------ | --------------------------------------------------- | ---- | ------------------ |
| value  | [CheckBoxShape](ts-basic-components-checkbox.md#checkboxshape11) | Yes  | Shape of the check box group.<br>Default value: **CheckBoxShape.CIRCLE**<br>**NOTE**<br>The shape of the check box group component follows the settings configured.<br>All check boxes within the check box group that do not have an individual shape set will conform to the shape of the check box group.<br>If a check box within the check box group has an individual shape set, that shape takes precedence over the check box group's shape.

## Events

In addition to the [universal events](ts-universal-events-click.md), the following events are supported.

### onChange

onChange(callback: (event: CheckboxGroupResult) => void )

Invoked when the selected status of the check box group or any check box wherein changes.

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters** 

| Name | Type                                               | Mandatory | Description              |
| ------ | --------------------------------------------------- | ---- | ------------------ |
| event  | [CheckboxGroupResult](#checkboxgroupresult) | Yes  | Information about the check box group. |

## CheckboxGroupResult

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

| Name    | Type  | Description     |
| ------ | ------ | ------- |
| name   | Array&lt;string&gt; | Names of all the selected check boxes in the group. |
| status | [SelectStatus](#selectstatus)  | Selected status. |

## SelectStatus

**Widget capability**: Since API version 9, this feature is supported in ArkTS widgets.

**Atomic service API**: This API can be used in atomic services since API version 11.

| 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. |

## Example

### Example 1

```ts
// xxx.ets
@Entry
@Component
struct CheckboxExample {
  build() {
    Scroll() {
      Column() {
        // Select All button
        Flex({ justifyContent: FlexAlign.Start, alignItems: ItemAlign.Center }) {
          CheckboxGroup({ group: 'checkboxGroup' })
            .checkboxShape(CheckBoxShape.ROUNDED_SQUARE)
            .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')
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .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')
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .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')
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .onChange((value: boolean) => {
              console.info('Checkbox3 change is' + value)
            })
          Text('Checkbox3').fontSize(14).lineHeight(20).fontColor('#182431').fontWeight(500)
        }.margin({ left: 36 })
      }
    }
  }
}
```
![checkboxGroup](figures/checkboxGroup.gif)

### Example 2

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

  build() {
    Row() {
      Column() {
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          CheckboxGroup({ group: 'checkboxGroup' })
            .checkboxShape(CheckBoxShape.ROUNDED_SQUARE)
            .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)
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .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)
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .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)
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .onChange((value: boolean) => {
              console.info('Checkbox3 change is' + value)
            })
            .width(30)
            .height(30)
          Text('Checkbox3').fontSize(20)
        }
      }
      .width('100%')
    }
    .height('100%')
  }
}
```

![checkboxGroup](figures/checkboxGroup2.gif)