Flutter - Webview with dropdown in the appbar











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I am trying to have a dropdown menu in a screen rendered by this webview library. The problem is that the rect drawn by this webview overlaps everything, as the picture below shows:



enter image description here



return new WebviewScaffold(
appBar: new AppBar(
backgroundColor: Colors.white,
title: new Theme(
child: new DropdownButton(
isExpanded: true,
items: <String>['Foo', 'Bar'].map((String value) {
return new DropdownMenuItem<String>(
value: value,
child: new Text(
value,
overflow: TextOverflow.ellipsis,
),
);
}).toList(),
onChanged: (_) {}),
data: new ThemeData.dark(),
),
url: new Uri.dataFromString("<h1>test</h1> <p>this is a test</p>",
mimeType: 'text/html',
parameters: {'charset': 'utf-8'}).toString(),
);
});


Then, I went further and I did this :



final flutterWebviewPlugin = new FlutterWebviewPlugin();
String url = "https://www.google.com";
double _height = 100.0;
GlobalKey _keyRed = GlobalKey();

Rect rect;

@override
void initState() {
super.initState();

flutterWebviewPlugin.launch(url, rect: rect);
}

void handlepress() {
setState(() {
RenderBox renderBoxRed = _keyRed.currentContext.findRenderObject();
_height = renderBoxRed.size.height;
print("height $_height");
});
}

@override
Widget build(BuildContext context) {
final mediaQuery = MediaQuery.of(context);
rect = new Rect.fromLTWH(
0.0, _height, mediaQuery.size.width, mediaQuery.size.height);
flutterWebviewPlugin.resize(rect);

return new AppBar(
backgroundColor: Colors.white,
title: new Theme(
child: new drop.DropdownButton(
key: _keyRed,
handler: handlepress,
isExpanded: true,
items: <String>['Foo', 'Bar'].map((String value) {
return new drop.DropdownMenuItem<String>(
value: value,
child: new Text(
value,
overflow: TextOverflow.ellipsis,
),
);
}).toList(),
onChanged: (_) => handlepress()),
data: new ThemeData.dark(),
),
leading: new IconButton(
icon: new Icon(
Icons.keyboard_arrow_left,
color: Colors.black,
size: 40.0,
),
onPressed: () => Navigator.of(context).pop(),
),
elevation: 0.0,
);
}


With this second code, drop.DropdownButton is my class that override DropDownButton in order to pass my Callback to onTap (click on the header of the dropdown). This code has effects on the rect rendered by the webview, but still do not work properly.



I also tried to hide the rect when the dropdown menu is extended, then show it again when it is collapsed. But there is not way I could find to detect these events.










share|improve this question


























    up vote
    0
    down vote

    favorite












    I am trying to have a dropdown menu in a screen rendered by this webview library. The problem is that the rect drawn by this webview overlaps everything, as the picture below shows:



    enter image description here



    return new WebviewScaffold(
    appBar: new AppBar(
    backgroundColor: Colors.white,
    title: new Theme(
    child: new DropdownButton(
    isExpanded: true,
    items: <String>['Foo', 'Bar'].map((String value) {
    return new DropdownMenuItem<String>(
    value: value,
    child: new Text(
    value,
    overflow: TextOverflow.ellipsis,
    ),
    );
    }).toList(),
    onChanged: (_) {}),
    data: new ThemeData.dark(),
    ),
    url: new Uri.dataFromString("<h1>test</h1> <p>this is a test</p>",
    mimeType: 'text/html',
    parameters: {'charset': 'utf-8'}).toString(),
    );
    });


    Then, I went further and I did this :



    final flutterWebviewPlugin = new FlutterWebviewPlugin();
    String url = "https://www.google.com";
    double _height = 100.0;
    GlobalKey _keyRed = GlobalKey();

    Rect rect;

    @override
    void initState() {
    super.initState();

    flutterWebviewPlugin.launch(url, rect: rect);
    }

    void handlepress() {
    setState(() {
    RenderBox renderBoxRed = _keyRed.currentContext.findRenderObject();
    _height = renderBoxRed.size.height;
    print("height $_height");
    });
    }

    @override
    Widget build(BuildContext context) {
    final mediaQuery = MediaQuery.of(context);
    rect = new Rect.fromLTWH(
    0.0, _height, mediaQuery.size.width, mediaQuery.size.height);
    flutterWebviewPlugin.resize(rect);

    return new AppBar(
    backgroundColor: Colors.white,
    title: new Theme(
    child: new drop.DropdownButton(
    key: _keyRed,
    handler: handlepress,
    isExpanded: true,
    items: <String>['Foo', 'Bar'].map((String value) {
    return new drop.DropdownMenuItem<String>(
    value: value,
    child: new Text(
    value,
    overflow: TextOverflow.ellipsis,
    ),
    );
    }).toList(),
    onChanged: (_) => handlepress()),
    data: new ThemeData.dark(),
    ),
    leading: new IconButton(
    icon: new Icon(
    Icons.keyboard_arrow_left,
    color: Colors.black,
    size: 40.0,
    ),
    onPressed: () => Navigator.of(context).pop(),
    ),
    elevation: 0.0,
    );
    }


    With this second code, drop.DropdownButton is my class that override DropDownButton in order to pass my Callback to onTap (click on the header of the dropdown). This code has effects on the rect rendered by the webview, but still do not work properly.



    I also tried to hide the rect when the dropdown menu is extended, then show it again when it is collapsed. But there is not way I could find to detect these events.










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am trying to have a dropdown menu in a screen rendered by this webview library. The problem is that the rect drawn by this webview overlaps everything, as the picture below shows:



      enter image description here



      return new WebviewScaffold(
      appBar: new AppBar(
      backgroundColor: Colors.white,
      title: new Theme(
      child: new DropdownButton(
      isExpanded: true,
      items: <String>['Foo', 'Bar'].map((String value) {
      return new DropdownMenuItem<String>(
      value: value,
      child: new Text(
      value,
      overflow: TextOverflow.ellipsis,
      ),
      );
      }).toList(),
      onChanged: (_) {}),
      data: new ThemeData.dark(),
      ),
      url: new Uri.dataFromString("<h1>test</h1> <p>this is a test</p>",
      mimeType: 'text/html',
      parameters: {'charset': 'utf-8'}).toString(),
      );
      });


      Then, I went further and I did this :



      final flutterWebviewPlugin = new FlutterWebviewPlugin();
      String url = "https://www.google.com";
      double _height = 100.0;
      GlobalKey _keyRed = GlobalKey();

      Rect rect;

      @override
      void initState() {
      super.initState();

      flutterWebviewPlugin.launch(url, rect: rect);
      }

      void handlepress() {
      setState(() {
      RenderBox renderBoxRed = _keyRed.currentContext.findRenderObject();
      _height = renderBoxRed.size.height;
      print("height $_height");
      });
      }

      @override
      Widget build(BuildContext context) {
      final mediaQuery = MediaQuery.of(context);
      rect = new Rect.fromLTWH(
      0.0, _height, mediaQuery.size.width, mediaQuery.size.height);
      flutterWebviewPlugin.resize(rect);

      return new AppBar(
      backgroundColor: Colors.white,
      title: new Theme(
      child: new drop.DropdownButton(
      key: _keyRed,
      handler: handlepress,
      isExpanded: true,
      items: <String>['Foo', 'Bar'].map((String value) {
      return new drop.DropdownMenuItem<String>(
      value: value,
      child: new Text(
      value,
      overflow: TextOverflow.ellipsis,
      ),
      );
      }).toList(),
      onChanged: (_) => handlepress()),
      data: new ThemeData.dark(),
      ),
      leading: new IconButton(
      icon: new Icon(
      Icons.keyboard_arrow_left,
      color: Colors.black,
      size: 40.0,
      ),
      onPressed: () => Navigator.of(context).pop(),
      ),
      elevation: 0.0,
      );
      }


      With this second code, drop.DropdownButton is my class that override DropDownButton in order to pass my Callback to onTap (click on the header of the dropdown). This code has effects on the rect rendered by the webview, but still do not work properly.



      I also tried to hide the rect when the dropdown menu is extended, then show it again when it is collapsed. But there is not way I could find to detect these events.










      share|improve this question













      I am trying to have a dropdown menu in a screen rendered by this webview library. The problem is that the rect drawn by this webview overlaps everything, as the picture below shows:



      enter image description here



      return new WebviewScaffold(
      appBar: new AppBar(
      backgroundColor: Colors.white,
      title: new Theme(
      child: new DropdownButton(
      isExpanded: true,
      items: <String>['Foo', 'Bar'].map((String value) {
      return new DropdownMenuItem<String>(
      value: value,
      child: new Text(
      value,
      overflow: TextOverflow.ellipsis,
      ),
      );
      }).toList(),
      onChanged: (_) {}),
      data: new ThemeData.dark(),
      ),
      url: new Uri.dataFromString("<h1>test</h1> <p>this is a test</p>",
      mimeType: 'text/html',
      parameters: {'charset': 'utf-8'}).toString(),
      );
      });


      Then, I went further and I did this :



      final flutterWebviewPlugin = new FlutterWebviewPlugin();
      String url = "https://www.google.com";
      double _height = 100.0;
      GlobalKey _keyRed = GlobalKey();

      Rect rect;

      @override
      void initState() {
      super.initState();

      flutterWebviewPlugin.launch(url, rect: rect);
      }

      void handlepress() {
      setState(() {
      RenderBox renderBoxRed = _keyRed.currentContext.findRenderObject();
      _height = renderBoxRed.size.height;
      print("height $_height");
      });
      }

      @override
      Widget build(BuildContext context) {
      final mediaQuery = MediaQuery.of(context);
      rect = new Rect.fromLTWH(
      0.0, _height, mediaQuery.size.width, mediaQuery.size.height);
      flutterWebviewPlugin.resize(rect);

      return new AppBar(
      backgroundColor: Colors.white,
      title: new Theme(
      child: new drop.DropdownButton(
      key: _keyRed,
      handler: handlepress,
      isExpanded: true,
      items: <String>['Foo', 'Bar'].map((String value) {
      return new drop.DropdownMenuItem<String>(
      value: value,
      child: new Text(
      value,
      overflow: TextOverflow.ellipsis,
      ),
      );
      }).toList(),
      onChanged: (_) => handlepress()),
      data: new ThemeData.dark(),
      ),
      leading: new IconButton(
      icon: new Icon(
      Icons.keyboard_arrow_left,
      color: Colors.black,
      size: 40.0,
      ),
      onPressed: () => Navigator.of(context).pop(),
      ),
      elevation: 0.0,
      );
      }


      With this second code, drop.DropdownButton is my class that override DropDownButton in order to pass my Callback to onTap (click on the header of the dropdown). This code has effects on the rect rendered by the webview, but still do not work properly.



      I also tried to hide the rect when the dropdown menu is extended, then show it again when it is collapsed. But there is not way I could find to detect these events.







      drop-down-menu webview dart flutter






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 21 at 17:31









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