如何在触摸浮动按钮时停止flutter_ WebView的WebView的触摸响应

import 'package:flutter/gestures.dart';

import 'package:flutter_webview/flutter_webview.dart';

class CustomWebView extends WebView {
  CustomWebView({
    Key key,
    initialUrl,
    ...
  }) : super(
          key: key,
          initialUrl: initialUrl,
          ...
        );
}

class CustomWebView extends WebView {
  ...
  
  @override
  createHitTestable() {
    return CustomWebViewGestureRecognizer();
  }
}

class CustomWebViewGestureRecognizer extends OneSequenceGestureRecognizer {
  @override
  void addAllowedPointer(PointerEvent event) {
    // 在此处判断是否触摸到了浮动按钮，如果是，则不允许继续传递事件给WebView
    // 可以通过判断触摸点的位置和浮动按钮的位置关系来实现
    if (isTouchingFloatingButton(event.position)) {
      stopTrackingPointer(event.pointer);
    } else {
      super.addAllowedPointer(event);
    }
  }

  @override
  void handleEvent(PointerEvent event) {
    // 不处理任何事件
  }

  @override
  String get debugDescription => 'CustomWebViewGestureRecognizer';
}

CustomWebView(
  initialUrl: 'https://example.com',
  ...
)