diff --git a/example/lib/main.dart b/example/lib/main.dart index 202509b..122716c 100644 --- a/example/lib/main.dart +++ b/example/lib/main.dart @@ -7,21 +7,11 @@ void main() { class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); - // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( - // This is the theme of your application. - // - // Try running your application with "flutter run". You'll see the - // application has a blue toolbar. Then, without quitting the app, try - // changing the primarySwatch below to Colors.green and then invoke - // "hot reload" (press "r" in the console where you ran "flutter run", - // or simply save your changes to "hot reload" in a Flutter IDE). - // Notice that the counter didn't reset back to zero; the application - // is not restarted. primarySwatch: Colors.blue, ), home: const MyHomePage(title: 'Flutter Demo Home Page'), @@ -32,15 +22,6 @@ class MyApp extends StatelessWidget { class MyHomePage extends StatefulWidget { const MyHomePage({Key? key, required this.title}) : super(key: key); - // This widget is the home page of your application. It is stateful, meaning - // that it has a State object (defined below) that contains fields that affect - // how it looks. - - // This class is the configuration for the state. It holds the values (in this - // case the title) provided by the parent (in this case the App widget) and - // used by the build method of the State. Fields in a Widget subclass are - // always marked "final". - final String title; @override @@ -52,47 +33,18 @@ class _MyHomePageState extends State { void _incrementCounter() { setState(() { - // This call to setState tells the Flutter framework that something has - // changed in this State, which causes it to rerun the build method below - // so that the display can reflect the updated values. If we changed - // _counter without calling setState(), then the build method would not be - // called again, and so nothing would appear to happen. _counter++; }); } @override Widget build(BuildContext context) { - // This method is rerun every time setState is called, for instance as done - // by the _incrementCounter method above. - // - // The Flutter framework has been optimized to make rerunning build methods - // fast, so that you can just rebuild anything that needs updating rather - // than having to individually change instances of widgets. return Scaffold( appBar: AppBar( - // Here we take the value from the MyHomePage object that was created by - // the App.build method, and use it to set our appbar title. title: Text(widget.title), ), body: Center( - // Center is a layout widget. It takes a single child and positions it - // in the middle of the parent. child: Column( - // Column is also a layout widget. It takes a list of children and - // arranges them vertically. By default, it sizes itself to fit its - // children horizontally, and tries to be as tall as its parent. - // - // Invoke "debug painting" (press "p" in the console, choose the - // "Toggle Debug Paint" action from the Flutter Inspector in Android - // Studio, or the "Toggle Debug Paint" command in Visual Studio Code) - // to see the wireframe for each widget. - // - // Column has various properties to control how it sizes itself and - // how it positions its children. Here we use mainAxisAlignment to - // center the children vertically; the main axis here is the vertical - // axis because Columns are vertical (the cross axis would be - // horizontal). mainAxisAlignment: MainAxisAlignment.center, children: [ const Text(