| // 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 SlideTransition |
| |
| 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 Center( |
| child: MyStatefulWidget(), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({super.key}); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> |
| with SingleTickerProviderStateMixin { |
| late final AnimationController _controller = AnimationController( |
| duration: const Duration(seconds: 2), |
| vsync: this, |
| )..repeat(reverse: true); |
| late final Animation<Offset> _offsetAnimation = Tween<Offset>( |
| begin: Offset.zero, |
| end: const Offset(1.5, 0.0), |
| ).animate(CurvedAnimation( |
| parent: _controller, |
| curve: Curves.elasticIn, |
| )); |
| |
| @override |
| void dispose() { |
| _controller.dispose(); |
| super.dispose(); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return SlideTransition( |
| position: _offsetAnimation, |
| child: const Padding( |
| padding: EdgeInsets.all(8.0), |
| child: FlutterLogo(size: 150.0), |
| ), |
| ); |
| } |
| } |