HarmonyOS tab嵌套横向list,如何实现list滑动到最右边就自动触发tab的滑动切换？

import { router } from '@kit.ArkUI'  
@Entry  
@Component  
export struct Tabs240529160413047 {  
  @State tabArray: Array<number> = [0, 1, 2, 3, 4, 5, 6, 7]  
  @State focusIndex: number = 0  
  @State pre: number = 0  
  @State index: number = 0  
  private controller: TabsController = new TabsController()  
  @State test: boolean = false  
  @State animationDuration: number = 300  
  @State indicatorLeftMargin: number = 0  
  @State indicatorWidth: number = 0  
  private tabWidth: number = 0;  
  private scrollerForScroll: Scroller = new Scroller()  
  // 单独的页签  
  @Builder  
  Tab(tabName: string, tabItem: number, tabIndex: number) {  
    Row({ space: 20 }) {  
      Text(tabName)  
        .fontSize(18)  
        .fontColor(tabIndex === this.focusIndex ? Color.Blue : Color.Black)  
        .id(tabIndex.toString())  
        .onAreaChange((oldValue: Area, newValue: Area) => {  
          if (this.focusIndex === tabIndex && (this.indicatorLeftMargin === 0 || this.indicatorWidth === 0)) {  
            if (newValue.position.x != undefined) {  
              let positionX = Number.parseFloat(newValue.position.x.toString())  
              this.indicatorLeftMargin = Number.isNaN(positionX) ? 0 : positionX  
            }  
            let width = Number.parseFloat(newValue.width.toString())  
            this.tabWidth = Number.isNaN(width) ? 0 : width  
            this.indicatorWidth = this.tabWidth  
          }  
        })  
    }  
    .justifyContent(FlexAlign.Center)  
    .constraintSize({ minWidth: 35 })  
    .width(120)  
    .height(30)  
    .onClick(() => {  
      this.controller.changeIndex(tabIndex)  
      this.focusIndex = tabIndex  
    })  
    .backgroundColor("#ffb7b7b7")  
  }  
  @Builder  
  WebTab(tabName: string, tabItem: number, tabIndex: number) {  
    Row({ space: 20 }) {  
      Text(tabName).fontSize(18).fontColor(tabIndex === this.focusIndex ? Color.Blue : Color.Black)  
    }  
    .justifyContent(FlexAlign.Center)  
    .constraintSize({ minWidth: 35 })  
    .width(120)  
    .height(30)  
    .onClick(() => {   
      router.pushUrl({ url: 'pages/WebPage' })  
    })  
    .backgroundColor("#ffb7b7b7")  
  }  
  build() {  
    Column() {  
      Stack({ alignContent: Alignment.TopStart }) {  
        Row() { // 页签  
          List({ space: 0, initialIndex: 0, scroller: this.scrollerForScroll }) {  
            ForEach(this.tabArray, (item: number, index: number) => {  
              if (item === 4) {  
                ListItem() {  
                  this.WebTab("页签 " + item, item, index)  
                }  
              } else {  
                ListItem() {  
                  this.Tab("页签 " + item, item, index)  
                }  
              }  
            }, (item: string) => item)  
          }  
          .listDirection(Axis.Horizontal)  
          .height(30)  
          .friction(0.6)  
          .alignListItem(ListItemAlign.Start)  
          .scrollBar(BarState.Off)  
          .width('100%')  
          .backgroundColor("#ffb7b7b7")  
          .onScroll((xOffset: number, yOffset: number) => {  
            this.indicatorLeftMargin -= xOffset  
          })  
        }.width('100%')  
  
        Column()  
          .height(2)  
          .width(this.indicatorWidth)  
          .margin({ left: this.indicatorLeftMargin, top: 30 })  
          .backgroundColor(Color.Blue)  
      }  
      .height(40)  
      .width('100%')  
      .backgroundColor("#ffb7b7b7") //tabs  
      Tabs({ barPosition: BarPosition.Start, controller: this.controller }) {  
        ForEach(this.tabArray, (item: number, index: number) => {  
          TabContent() {  
            Text('我是页面 ' + item + " 的内容").height(300).width('100%').fontSize(30)  
          }.backgroundColor(Color.White)  
        }, (item: string) => item)  
      }.width('100%').barHeight(0).animationDuration(0).onChange((index: number) => {  
        console.log('foo change')  
        this.focusIndex = index  
        this.scrollerForScroll.scrollToIndex(index - 1, true)  
        let indexInfo = this.getTextInfo(index)  
        let currentLeft = indexInfo.left  
        let currentWidth = indexInfo.width  
        this.startAnimateTo(20, currentLeft, currentWidth)  
      })  
    }.width('100%').height('100%')  
  }  
  private getTextInfo(index: number): Record<string, number> {  
    let strJson = getInspectorByKey(index.toString())  
    try {  
      let obj: Record<string, string> = JSON.parse(strJson)  
      let rectInfo: number[][] = JSON.parse('[' + obj.$rect + ']')  
      return { 'left': px2vp(rectInfo[0][0]), 'width': px2vp(rectInfo[1][0] - rectInfo[0][0]) }  
    } catch (error) {  
      return { 'left': 0, 'width': 0 }  
    }  
  }  
  private startAnimateTo(duration: number, leftMargin: number, width: number) {  
    animateTo({  
      duration: duration, // 动画时长  
      curve: Curve.Linear, // 动画曲线  
      iterations: 1, // 播放次数  
      playMode: PlayMode.Normal, // 动画模式  
      onFinish: () => {  
        console.info('play end')  
      }  
    }, () => {  
      this.indicatorLeftMargin = leftMargin  
      this.tabWidth = width  
      this.indicatorWidth = width  
    })  
  }  
}