CanvasGradient

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

CanvasGradient provides a gradient object.

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

  @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)
            this.grad.addColorStop(0.0, 'red')
            this.grad.addColorStop(0.5, 'white')
            this.grad.addColorStop(1.0, 'green')
            this.context.fillStyle = grad
            this.context.fillRect(0, 0, 500, 500)
          })
      }
      .width('100%')
      .height('100%')
    }
  }