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- debugPaintSizeEnabled = true;
- import 'package:flutter/material.dart';
- import 'package:flutter/rendering.dart';
- void main()
- {
- runApp(MyApp());
- }
- class MyApp extends StatelessWidget {
- // This widget is the root of your application.
- @override
- Widget build(BuildContext context) {
- debugPaintSizeEnabled = true;
- return MaterialApp(
- title: 'Flutter Demo',
- theme: ThemeData(
- primarySwatch: Colors.blue,
- ),
- home: MyHomePage(title: 'Flutter Demo Home Page'),
- );
- }
- }
- class MyHomePage extends StatefulWidget {
- MyHomePage({Key key, this.title}) : super(key: key);
- final String title;
- @override
- _MyHomePageState createState() => _MyHomePageState();
- }
- class _MyHomePageState extends State<MyHomePage> {
- int _counter = 0;
- void _incrementCounter() {
- setState(() {
- _counter++;
- });
- }
- @override
- Widget build(BuildContext context) {
- return Scaffold(
- appBar: AppBar(
- title: Text(widget.title),
- ),
- body: Center(
- child: Column(
- mainAxisAlignment: MainAxisAlignment.center,
- children: <Widget>[
- Text(
- 'You have pushed the button this many times:',
- ),
- Text(
- '$_counter',
- style: Theme.of(context).textTheme.display1,
- ),
- ],
- ),
- ),
- floatingActionButton: FloatingActionButton(
- onPressed: _incrementCounter,
- tooltip: 'Increment',
- child: Icon(Icons.add),
- ),
- );
- }
- }
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