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| import 'package:flutter/material.dart'; | |
| // This example showcases how, by using functions over classes, | |
| // this _can_ break features such as AnimatedSwitcher | |
| void main() => runApp(MyApp()); | |
| class MyApp extends StatelessWidget { | |
| @override | |
| Widget build(context) { | |
| return MaterialApp( | |
| home: Home(), | |
| ); | |
| } | |
| } | |
| class Home extends StatefulWidget { | |
| @override | |
| _HomeState createState() => _HomeState(); | |
| } | |
| class _HomeState extends State<Home> { | |
| bool showCircle = false; | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| body: Center( | |
| child: Column( | |
| mainAxisSize: MainAxisSize.min, | |
| children: [ | |
| AnimatedSwitcher( | |
| duration: const Duration(seconds: 1), | |
| child: showCircle ? Circle() : Square(), | |
| // Uncomment to break the animation | |
| // child: showCircle | |
| // ? Container( | |
| // width: 50, | |
| // height: 50, | |
| // child: Material( | |
| // shape: RoundedRectangleBorder( | |
| // borderRadius: BorderRadius.all(Radius.circular(50)), | |
| // ), | |
| // color: Colors.red, | |
| // clipBehavior: Clip.hardEdge, | |
| // ), | |
| // ) | |
| // : Container( | |
| // width: 50, | |
| // height: 50, | |
| // color: Colors.red, | |
| // ), | |
| ), | |
| RaisedButton( | |
| onPressed: () => setState(() => showCircle = !showCircle), | |
| child: Text( | |
| 'Click me to do a fade transition between square and a circle', | |
| ), | |
| ) | |
| ], | |
| ), | |
| ), | |
| ); | |
| } | |
| } | |
| class Square extends StatelessWidget { | |
| @override | |
| Widget build(BuildContext context) { | |
| return Container( | |
| width: 50, | |
| height: 50, | |
| color: Colors.red, | |
| ); | |
| } | |
| } | |
| class Circle extends StatelessWidget { | |
| @override | |
| Widget build(BuildContext context) { | |
| return Container( | |
| width: 50, | |
| height: 50, | |
| child: Material( | |
| shape: RoundedRectangleBorder( | |
| borderRadius: BorderRadius.all(Radius.circular(50)), | |
| ), | |
| color: Colors.red, | |
| clipBehavior: Clip.hardEdge, | |
| ), | |
| ); | |
| } | |
| } |
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