HarmonyOS/OpenHarmony application development - ArkTS canvas component CanvasRenderingContext2D object (9)

fillRect strokeRect
fillRect
fillRect(x: number, y: number, w: number, h: number): void
Fills a rectangle.
parameter:

Example:

// xxx.ets
@Entry
@Component
struct FillRect {
  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(() =>{
          this.context.fillRect(0,30,100,100)
       })
      }
    .width('100%')
    .height('100%')
  }
}

Effect

strokeRect
strokeRect(x: number, y: number, w: number, h: number): void
Draw a rectangle with a border, and the interior of the rectangle is not filled.
Parameters:

Example:

// xxx.ets
@Entry
@Component
struct StrokeRect {
  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(() =>{
          this.context.strokeRect(30, 30, 200, 150)
      })
    }
    .width('100%')
    .height('100%')
  }
}

Effect