HarmonyOS 双向滑动Slider组件

请参考以下规避方案：

@Entry
@Component
struct SliderPage {
  @State message: string = 'Hello World';


  private blockSize: number = 16;
  @State offsetX1: number = 0
  @State offsetX2: number = 0
  @State positionX1: number = 0
  @State positionX2: number = 300
  @State positionY: number = 0
  build() {
    Column() {
      Stack(){
        Row(){}.justifyContent(FlexAlign.Start).width(300).height(15).backgroundColor(Color.Grey)
        Stack(){}.width(this.blockSize).height(this.blockSize).backgroundColor(Color.Red).position({x:this.positionX1,y:this.positionY})
        .gesture(
          PanGesture()
            .onActionStart((event: GestureEvent) => {
              console.info('Pan start')
            })
            .onActionUpdate((event: GestureEvent) => {
              if (event) {
                if(this.offsetX1 + event.offsetX > this.positionX2 || this.offsetX1 + event.offsetX <= 0) {
                  return;
                } else {
                  this.positionX1 = this.offsetX1 + event.offsetX
                }
              }
            })
            .onActionEnd(() => {
              this.offsetX1 = this.positionX1
              console.info('Pan end')
            })
        )
        Stack().width(this.blockSize).height(this.blockSize).backgroundColor(Color.Blue).position({x:this.positionX2,y:this.positionY})
          .gesture(
            PanGesture()
              .onActionStart((event: GestureEvent) => {
                console.info('Pan start')
              })
              .onActionUpdate((event: GestureEvent) => {
                if (event) {
                  if(this.offsetX2 + event.offsetX < this.positionX1 || this.offsetX2 + event.offsetX >= 300) {
                    return;
                  } else {
                    this.positionX2 = this.offsetX2 + event.offsetX
                  }
                }
              })
              .onActionEnd(() => {
                this.offsetX2 = this.positionX2
                console.info('Pan end')
              })
          )
      }


    }
    .height('100%')
    .width('100%')
  }
}
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