Created
February 14, 2017 21:19
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| import 'package:flutter/material.dart'; | |
| void main() { | |
| runApp(new MyApp()); | |
| } | |
| class MyApp extends StatelessWidget { | |
| @override | |
| Widget build(BuildContext context) { | |
| return new MaterialApp( | |
| title: 'Flutter Demo', | |
| theme: new ThemeData(primarySwatch: Colors.blue), | |
| home: new MyHomePage( | |
| title: 'Flutter Demo Home Page', | |
| initialHeight: 800.0, | |
| ), | |
| ); | |
| } | |
| } | |
| class MyHomePage extends StatefulWidget { | |
| MyHomePage({Key key, this.title, this.initialHeight}) : super(key: key); | |
| final String title; | |
| final double initialHeight; | |
| @override | |
| _MyHomePageState createState() => new _MyHomePageState(); | |
| } | |
| class _MyHomePageState extends State<MyHomePage> { | |
| double height; | |
| @override | |
| void initState() { | |
| super.initState(); | |
| height = config.initialHeight; | |
| } | |
| @override | |
| Widget build(BuildContext context) { | |
| return new Scaffold( | |
| appBar: new AppBar(title: new Text(config.title)), | |
| body: new Center(child: new MyBody(height: height)), | |
| floatingActionButton: new FloatingActionButton( | |
| child: new Icon(Icons.remove), | |
| onPressed: () => setState(() => height -= 200.0), | |
| ), | |
| ); | |
| } | |
| } | |
| class MyBody extends StatelessWidget { | |
| MyBody({Key key, this.height}) : super(key: key); | |
| final double height; | |
| @override | |
| Widget build(BuildContext context) { | |
| return new ListView( | |
| children: <Widget>[ | |
| new Container( | |
| decoration: new BoxDecoration(backgroundColor: Colors.red[500]), | |
| height: height, | |
| ), | |
| new Container( | |
| decoration: new BoxDecoration(backgroundColor: Colors.green[500]), | |
| height: 500.0, | |
| ), | |
| new Container( | |
| decoration: new BoxDecoration(backgroundColor: Colors.blue[500]), | |
| height: 500.0, | |
| ), | |
| ], | |
| ); | |
| } | |
| } |
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