| // 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'; |
| |
| /// Flutter code sample for [CharacterActivator]. |
| |
| void main() => runApp(const CharacterActivatorExampleApp()); |
| |
| class CharacterActivatorExampleApp extends StatelessWidget { |
| const CharacterActivatorExampleApp({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| home: Scaffold( |
| appBar: AppBar(title: const Text('CharacterActivator Sample')), |
| body: const Center( |
| child: CharacterActivatorExample(), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| class HelpMenuIntent extends Intent { |
| const HelpMenuIntent(); |
| } |
| |
| class CharacterActivatorExample extends StatefulWidget { |
| const CharacterActivatorExample({super.key}); |
| |
| @override |
| State<CharacterActivatorExample> createState() => _CharacterActivatorExampleState(); |
| } |
| |
| class _CharacterActivatorExampleState extends State<CharacterActivatorExample> { |
| @override |
| Widget build(BuildContext context) { |
| return Shortcuts( |
| shortcuts: const <ShortcutActivator, Intent>{ |
| CharacterActivator('?'): HelpMenuIntent(), |
| }, |
| child: Actions( |
| actions: <Type, Action<Intent>>{ |
| HelpMenuIntent: CallbackAction<HelpMenuIntent>( |
| onInvoke: (HelpMenuIntent intent) { |
| ScaffoldMessenger.of(context).showSnackBar( |
| const SnackBar(content: Text('Keep calm and carry on!')), |
| ); |
| return null; |
| }, |
| ), |
| }, |
| child: const Focus( |
| autofocus: true, |
| child: Column( |
| children: <Widget>[ |
| Text('Press question mark for help'), |
| ], |
| ), |
| ), |
| ), |
| ); |
| } |
| } |