| // 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 'use_cases.dart'; |
| |
| class AppBarUseCase extends UseCase { |
| @override |
| String get name => 'AppBar'; |
| |
| @override |
| String get route => '/app-bar'; |
| |
| @override |
| Widget build(BuildContext context) => const MainWidget(); |
| } |
| |
| class MainWidget extends StatefulWidget { |
| const MainWidget({super.key}); |
| |
| @override |
| State<MainWidget> createState() => MainWidgetState(); |
| } |
| |
| class MainWidgetState extends State<MainWidget> { |
| int currentIndex = 0; |
| |
| void _onChanged(int? value) { |
| setState(() { |
| currentIndex = value!; |
| }); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| appBar: <PreferredSizeWidget>[ |
| AppBar( |
| backgroundColor: Theme.of(context).colorScheme.inversePrimary, |
| title: Semantics(headingLevel: 1, child: const Text('AppBar')), |
| ), |
| AppBar( |
| backgroundColor: Theme.of(context).colorScheme.inversePrimary, |
| title: Semantics(headingLevel: 1, child: const Text('AppBar')), |
| actions: <Widget>[ |
| IconButton( |
| icon: const Icon(Icons.add_alert), |
| tooltip: 'Show Snackbar', |
| onPressed: () { |
| ScaffoldMessenger.of(context).showSnackBar( |
| const SnackBar(content: Text('This is a snackbar'))); |
| }, |
| ), |
| IconButton( |
| icon: const Icon(Icons.navigate_next), |
| tooltip: 'Go to the next page', |
| onPressed: () { |
| Navigator.push(context, MaterialPageRoute<void>( |
| builder: (BuildContext context) { |
| return Scaffold( |
| appBar: AppBar( |
| backgroundColor: |
| Theme.of(context).colorScheme.inversePrimary, |
| title: Semantics(headingLevel: 1, child: const Text('Next Page')), |
| ), |
| body: const Center( |
| child: Text( |
| 'This is the next page', |
| style: TextStyle(fontSize: 24), |
| ), |
| ), |
| ); |
| }, |
| )); |
| }, |
| ), |
| ], |
| ), |
| AppBar( |
| backgroundColor: Theme.of(context).colorScheme.inversePrimary, |
| title: Semantics(headingLevel: 1, child: const Text('AppBar')), |
| actions: <Widget>[ |
| TextButton( |
| onPressed: () {}, |
| child: const Text('Action 1'), |
| ), |
| TextButton( |
| onPressed: () {}, |
| child: const Text('Action 2'), |
| ), |
| ], |
| ), |
| ][currentIndex], |
| body: ListView( |
| children: <Widget>[ |
| RadioListTile<int>( |
| title: const Text('1. Simple app bar'), |
| value: 0, |
| groupValue: currentIndex, |
| onChanged: _onChanged, |
| ), |
| RadioListTile<int>( |
| title: const Text('2. App bar with actions'), |
| value: 1, |
| groupValue: currentIndex, |
| onChanged: _onChanged, |
| ), |
| RadioListTile<int>( |
| title: const Text('3. App bar with text buttons'), |
| value: 2, |
| groupValue: currentIndex, |
| onChanged: _onChanged, |
| ), |
| ], |
| ), |
| ); |
| } |
| } |