| // 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. |
| |
| /// Flutter code sample for [AnimatedContainer]. |
| |
| import 'package:flutter/material.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| class MyApp extends StatelessWidget { |
| const MyApp({super.key}); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| title: _title, |
| home: Scaffold( |
| appBar: AppBar(title: const Text(_title)), |
| body: const MyStatefulWidget(), |
| ), |
| ); |
| } |
| } |
| |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({super.key}); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| bool selected = false; |
| |
| @override |
| Widget build(BuildContext context) { |
| return GestureDetector( |
| onTap: () { |
| setState(() { |
| selected = !selected; |
| }); |
| }, |
| child: Center( |
| child: AnimatedContainer( |
| width: selected ? 200.0 : 100.0, |
| height: selected ? 100.0 : 200.0, |
| color: selected ? Colors.red : Colors.blue, |
| alignment: |
| selected ? Alignment.center : AlignmentDirectional.topCenter, |
| duration: const Duration(seconds: 2), |
| curve: Curves.fastOutSlowIn, |
| child: const FlutterLogo(size: 75), |
| ), |
| ), |
| ); |
| } |
| } |