HarmonyOS/OpenHarmony应用开发-ArkTS画布组件CanvasRenderingContext2D对象(三)
lineCap 、 lineJoin 、 miterLimit
lineCap
// xxx.ets@Entry@Componentstruct LineCapExample { 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.lineWidth = 8 this.context.beginPath() this.context.lineCap = 'round' this.context.moveTo(30, 50) this.context.lineTo(220, 50) this.context.stroke() }) } .width('100%') .height('100%') }}
lineJoin
代码
// xxx.ets@Entry@Componentstruct LineJoinExample { 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.beginPath() this.context.lineWidth = 8 this.context.lineJoin = 'miter' this.context.moveTo(30, 30) this.context.lineTo(120, 60) this.context.lineTo(30, 110) this.context.stroke() }) } .width('100%') .height('100%') }}
效果
miterLimit
代码
// xxx.ets@Entry@Componentstruct MiterLimit { 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.lineWidth = 8 this.context.lineJoin = 'miter' this.context.miterLimit = 3 this.context.moveTo(30, 30) this.context.lineTo(60, 35) this.context.lineTo(30, 37) this.context.stroke() }) } .width('100%') .height('100%') }}
效果