// 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 [Shortcuts]. void main() => runApp(const ShortcutsExampleApp()); class ShortcutsExampleApp extends StatelessWidget { const ShortcutsExampleApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar(title: const Text('Shortcuts Sample')), body: const Center( child: ShortcutsExample(), ), ), ); } } class IncrementIntent extends Intent { const IncrementIntent(); } class DecrementIntent extends Intent { const DecrementIntent(); } class ShortcutsExample extends StatefulWidget { const ShortcutsExample({super.key}); @override State<ShortcutsExample> createState() => _ShortcutsExampleState(); } class _ShortcutsExampleState extends State<ShortcutsExample> { int count = 0; @override Widget build(BuildContext context) { return Shortcuts( shortcuts: const <ShortcutActivator, Intent>{ SingleActivator(LogicalKeyboardKey.arrowUp): IncrementIntent(), SingleActivator(LogicalKeyboardKey.arrowDown): DecrementIntent(), }, child: Actions( actions: <Type, Action<Intent>>{ IncrementIntent: CallbackAction<IncrementIntent>( onInvoke: (IncrementIntent intent) => setState(() { count = count + 1; }), ), DecrementIntent: CallbackAction<DecrementIntent>( onInvoke: (DecrementIntent intent) => setState(() { count = count - 1; }), ), }, child: Focus( autofocus: true, child: Column( children: <Widget>[ const Text('Add to the counter by pressing the up arrow key'), const Text('Subtract from the counter by pressing the down arrow key'), Text('count: $count'), ], ), ), ), ); } }