// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; /// Flutter code sample for [RadioMenuButton]. void main() => runApp(const MenuApp()); class MyRadioMenu extends StatefulWidget { const MyRadioMenu({super.key}); @override State<MyRadioMenu> createState() => _MyRadioMenuState(); } class _MyRadioMenuState extends State<MyRadioMenu> { final FocusNode _buttonFocusNode = FocusNode(debugLabel: 'Menu Button'); Color _backgroundColor = Colors.red; late ShortcutRegistryEntry _entry; static const SingleActivator _redShortcut = SingleActivator(LogicalKeyboardKey.keyR, control: true); static const SingleActivator _greenShortcut = SingleActivator(LogicalKeyboardKey.keyG, control: true); static const SingleActivator _blueShortcut = SingleActivator(LogicalKeyboardKey.keyB, control: true); @override void didChangeDependencies() { super.didChangeDependencies(); _entry = ShortcutRegistry.of(context).addAll(<ShortcutActivator, VoidCallbackIntent>{ _redShortcut: VoidCallbackIntent(() => _setBackgroundColor(Colors.red)), _greenShortcut: VoidCallbackIntent(() => _setBackgroundColor(Colors.green)), _blueShortcut: VoidCallbackIntent(() => _setBackgroundColor(Colors.blue)), }); } @override void dispose() { _buttonFocusNode.dispose(); _entry.dispose(); super.dispose(); } void _setBackgroundColor(Color? color) { setState(() { _backgroundColor = color!; }); } @override Widget build(BuildContext context) { return Column( crossAxisAlignment: CrossAxisAlignment.start, children: <Widget>[ MenuAnchor( childFocusNode: _buttonFocusNode, menuChildren: <Widget>[ RadioMenuButton<Color>( value: Colors.red, shortcut: _redShortcut, groupValue: _backgroundColor, onChanged: _setBackgroundColor, child: const Text('Red Background'), ), RadioMenuButton<Color>( value: Colors.green, shortcut: _greenShortcut, groupValue: _backgroundColor, onChanged: _setBackgroundColor, child: const Text('Green Background'), ), RadioMenuButton<Color>( value: Colors.blue, shortcut: _blueShortcut, groupValue: _backgroundColor, onChanged: _setBackgroundColor, child: const Text('Blue Background'), ), ], builder: (BuildContext context, MenuController controller, Widget? child) { return TextButton( focusNode: _buttonFocusNode, onPressed: () { if (controller.isOpen) { controller.close(); } else { controller.open(); } }, child: const Text('OPEN MENU'), ); }, ), Expanded( child: Container( color: _backgroundColor, ), ), ], ); } } class MenuApp extends StatelessWidget { const MenuApp({super.key}); @override Widget build(BuildContext context) { return const MaterialApp( home: Scaffold(body: MyRadioMenu()), ); } }