HarmonyOS 新起了一个全屏的subwindow，现在CustomDialog都还是弹在父window上，有什么办法在subwindow上弹吗？

参考demo：

EntryAbility.ets

EntryAbility.ets
import { AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { window } from '@kit.ArkUI';

import { BusinessError } from '@kit.BasicServicesKit';
export default class EntryAbility extends UIAbility {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
  }

  onDestroy(): void {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');
  }

  onWindowStageCreate(windowStage: window.WindowStage): void {
    // Main window is created, set main page for this ability
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
    console.info('onWindowStageCreate');
    // 创建子窗
    windowStage.createSubWindow('ResizeSubWindow', (err, windowClass) => {
      if (err.code > 0) {
        console.error(`failed to create subWindow Cause: ${err.message}`);
        return;
      }
      try {
        // 设置子窗口加载页
        windowClass.setUIContent('pages/ResizeSubWindow', () => {
          windowClass.setWindowBackgroundColor('#ccc000');
        });
        // 设置子窗口左上角坐标
        windowClass.moveWindowTo(0, 0);
        // 设置子窗口大小
        windowClass.resize(vp2px(385), vp2px(980));
        // 展示子窗口
        windowClass.showWindow();
        // 设置子窗口全屏化布局不避让安全区
        // windowClass.setWindowLayoutFullScreen(true);

      } catch (err) {
        console.error(`failed to create subWindow Cause:${err}`);
      }
    })

    windowStage.loadContent('pages/Index', (err) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content.');
    });
  }

  onWindowStageDestroy(): void {
    // Main window is destroyed, release UI related resources
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
  }

  onForeground(): void {
    // Ability has brought to foreground
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
  }

  onBackground(): void {
    // Ability has back to background
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
  }
}

index.ets

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

  build() {
    RelativeContainer() {
      Text(this.message)
        .id('HelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .alignRules({
          center: { anchor: '__container__', align: VerticalAlign.Center },
          middle: { anchor: '__container__', align: HorizontalAlign.Center }
        })
    }
    .height('100%')
    .width('100%')
    .backgroundColor('#aaa')
  }
}

ResizeSubWindow.ets

@CustomDialog
struct CustomDialogExample {
  controller?: CustomDialogController
  cancel: () => void = () => {
  }
  confirm: () => void = () => {
  }
  build() {
    Column() {
      Text('这是自定义弹窗')
        .fontSize(30)
        .height(100)
      Button('点我关闭弹窗')
        .onClick(() => {
          if (this.controller != undefined) {
            this.controller.close()
          }
        })
        .margin(20)
    }
  }
}
@Entry
@Component
struct CustomDialogUser {
  dialogController: CustomDialogController | null = new CustomDialogController({
    builder: CustomDialogExample({
      cancel: ()=> { this.onCancel() },
      confirm: ()=> { this.onAccept() }
    }),
    cancel: this.existApp,
    autoCancel: true,
    onWillDismiss:(dismissDialogAction: DismissDialogAction)=> {
      console.info("reason=" + JSON.stringify(dismissDialogAction.reason))
      console.log("dialog onWillDismiss")
      if (dismissDialogAction.reason == DismissReason.PRESS_BACK) {
        dismissDialogAction.dismiss()
      }
      if (dismissDialogAction.reason == DismissReason.TOUCH_OUTSIDE) {
        dismissDialogAction.dismiss()
      }
    },
    alignment: DialogAlignment.Center,
    offset: { dx: 0, dy: -20 },
    customStyle: false,
    cornerRadius: 20,
    width: 300,
    height: 200,
    borderWidth: 1,
    borderStyle: BorderStyle.Dashed,//使用borderStyle属性，需要和borderWidth属性一起使用
    borderColor: Color.Blue,//使用borderColor属性，需要和borderWidth属性一起使用
    backgroundColor: Color.White,
    shadow: ({ radius: 20, color: Color.Grey, offsetX: 50, offsetY: 0}),
  })
  // 在自定义组件即将析构销毁时将dialogController置空
  aboutToDisappear() {
    this.dialogController = null // 将dialogController置空
  }

  onCancel() {
    console.info('Callback when the first button is clicked')
  }

  onAccept() {
    console.info('Callback when the second button is clicked')
  }

  existApp() {
    console.info('Click the callback in the blank area')
  }

  build() {
    Column() {
      Button('click me')
        .onClick(() => {
          if (this.dialogController != null) {
            this.dialogController.open()
          }
        }).backgroundColor(0x317aff)
    }.width('100%').margin({ top: 5 })
  }
}