如何实现悬浮窗桌面穿透

import display from '@ohos.display'; 
import window from '@ohos.window'; 
import Prompt from '@system.prompt'; 
  
@Entry 
@Component 
struct Index { 
  @State screenWidth: number = 0; 
  @State screenHeight: number = 0; 
  
  aboutToAppear() { 
    this.screenWidth = display.getDefaultDisplaySync().width; 
    this.screenHeight = display.getDefaultDisplaySync().height; 
  } 
  
  build() { 
    Row() { 
      Button("弹窗") 
        .onClick(() => { 
          window.createWindow({ name: "screenDialog", windowType: window.WindowType.TYPE_FLOAT, ctx: getContext(this) }) 
            .then((r) => { 
              r.setUIContent("pages/ScreenPage2").then(() => { 
                r.setWindowBackgroundColor("#00000000") 
                r.resize(this.screenWidth, this.screenHeight).then(() => { 
                  r.showWindow().then(() => { 
                    r.getWindowProperties().isTransparent = true; 
                    r.setWindowTouchable(false) 
                    r.setWindowFocusable(false) 
                  }); 
                }); 
              }); 
            }) 
        }) 
  
      Button("应用内点击").onClick(() => { 
        Prompt.showToast({ message: "应用内点击" }) 
      }) 
    }.justifyContent(FlexAlign.Center).alignItems(VerticalAlign.Center) 
    .height('100%').width('100%') 
  } 
}