| // 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'; |
| |
| class ButtonMatrixApp extends StatefulWidget { |
| const ButtonMatrixApp({Key? key}) : super(key: key); |
| |
| @override |
| ButtonMatrixAppState createState() => ButtonMatrixAppState(); |
| } |
| |
| class ButtonMatrixAppState extends State<ButtonMatrixApp> { |
| |
| int count = 1; |
| int increment = 1; |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| home: Scaffold( |
| appBar: AppBar( |
| title: Text('Count: $count'), |
| actions: <Widget>[ |
| TextButton( |
| onPressed: () => setState(() { count += increment; }), |
| child: Text('Add $increment'), |
| ), |
| ], |
| ), |
| body: Row( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: List<Widget>.filled( |
| 3, |
| Column( |
| children: List<Widget>.filled( |
| 10, |
| TextButton( |
| child: const Text('Faster'), |
| onPressed: () => setState(() { increment += 1; }), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| void main() { |
| runApp(const ButtonMatrixApp()); |
| } |