| // 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 [AnimatedSize]. |
| |
| void main() => runApp(const AnimatedSizeExampleApp()); |
| |
| class AnimatedSizeExampleApp extends StatelessWidget { |
| const AnimatedSizeExampleApp({super.key}); |
| |
| static const Duration duration = Duration(seconds: 1); |
| static const Curve curve = Curves.easeIn; |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| home: Scaffold( |
| appBar: AppBar(title: const Text('AnimatedSize Sample')), |
| body: const Center( |
| child: AnimatedSizeExample( |
| duration: duration, |
| curve: curve, |
| ), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| class AnimatedSizeExample extends StatefulWidget { |
| const AnimatedSizeExample({ |
| required this.duration, |
| required this.curve, |
| super.key, |
| }); |
| |
| final Duration duration; |
| |
| final Curve curve; |
| |
| @override |
| State<AnimatedSizeExample> createState() => _AnimatedSizeExampleState(); |
| } |
| |
| class _AnimatedSizeExampleState extends State<AnimatedSizeExample> { |
| bool _isSelected = false; |
| |
| @override |
| Widget build(BuildContext context) { |
| return GestureDetector( |
| onTap: () { |
| setState(() { |
| _isSelected = !_isSelected; |
| }); |
| }, |
| child: ColoredBox( |
| color: Colors.amberAccent, |
| child: AnimatedSize( |
| duration: widget.duration, |
| curve: widget.curve, |
| child: SizedBox.square( |
| dimension: _isSelected ? 250.0 : 100.0, |
| child: const Center( |
| child: FlutterLogo(size: 75.0), |
| ), |
| ), |
| ), |
| ), |
| ); |
| } |
| } |