Component Area Change Event
NOTE
This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
Required Permissions
None
Events
Name | Bubble Supported | Description |
---|---|---|
onAreaChange(event: (oldValue: Area, newValue: Area) => void) | No | Triggered when the component area changes. For details about the Area type, see Area attributes. |
Example
// xxx.ets
@Entry
@Component
struct AreaExample {
@State value: string = 'Text'
@State size1: string = ''
build() {
Column() {
Text(this.value)
.backgroundColor(Color.Green).margin(30).fontSize(20)
.onClick(() => {
this.value = this.value + 'Text'
})
.onAreaChange((oldValue: Area, newValue: Area) => {
console.info(`Ace: on area change, oldValue is ${JSON.stringify(oldValue)} value is ${JSON.stringify(newValue)}`)
this.size1 = JSON.stringify(newValue)
})
Text('new area is: \n' + this.size).margin({ right: 30, left: 30 })
}
.width('100%').height('100%').margin({ top: 30 })
}
}