CanvasGradient

CanvasGradient provides a canvas gradient object.

NOTE

The APIs of this module are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

addColorStop

addColorStop(offset: number, color: string): void

Adds a color stop for the CanvasGradient object based on the specified offset and gradient color.

Parameters

Example

// xxx.ets
@Entry
@Component
struct Page45 {
private settings: RenderingContextSettings = new RenderingContextSettings(true)
private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)

build() {
  Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
    Canvas(this.context)
      .width('100%')
      .height('100%')
      .backgroundColor('#ffff00')
      .onReady(() => {
        var grad = this.context.createLinearGradient(50, 0, 300, 100)
        grad.addColorStop(0.0, '#ff0000')
        grad.addColorStop(0.5, '#ffffff')
        grad.addColorStop(1.0, '#00ff00')
        this.context.fillStyle = grad
        this.context.fillRect(0, 0, 500, 500)
      })
  }
  .width('100%')
  .height('100%')
}
}