mirror of https://github.com/flutter/samples.git
John Ryan
6 years ago
parent
4c5a3d3cbf
commit
05e0e71f73
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import 'package:flutter/material.dart';
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import 'src/basics/animation_controller_demo.dart';
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import 'src/misc/expand_card.dart';
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void main() => runApp(MyApp());
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void main() => runApp(AnimationsSamples());
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class MyApp extends StatelessWidget {
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// This widget is the root of your application.
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Flutter Demo',
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theme: ThemeData(
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// This is the theme of your application.
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//
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// Try running your application with "flutter run". You'll see the
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// application has a blue toolbar. Then, without quitting the app, try
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// changing the primarySwatch below to Colors.green and then invoke
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// "hot reload" (press "r" in the console where you ran "flutter run",
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// or simply save your changes to "hot reload" in a Flutter IDE).
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// Notice that the counter didn't reset back to zero; the application
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// is not restarted.
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primarySwatch: Colors.blue,
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),
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home: MyHomePage(title: 'Flutter Demo Home Page'),
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);
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}
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class Demo {
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final String name;
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final String route;
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final WidgetBuilder builder;
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Demo(this.name, this.route, this.builder);
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}
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class MyHomePage extends StatefulWidget {
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MyHomePage({Key key, this.title}) : super(key: key);
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List<Demo> basicDemos = [
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Demo('Animation Controller', AnimationControllerDemo.routeName,
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(context) => AnimationControllerDemo()),
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];
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// This widget is the home page of your application. It is stateful, meaning
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// that it has a State object (defined below) that contains fields that affect
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// how it looks.
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List<Demo> miscDemos = [
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Demo('Expandable Card', ExpandCardDemo.routeName,
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(context) => ExpandCardDemo()),
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];
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// This class is the configuration for the state. It holds the values (in this
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// case the title) provided by the parent (in this case the App widget) and
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// used by the build method of the State. Fields in a Widget subclass are
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// always marked "final".
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Map<String, WidgetBuilder> basicDemoRoutes = Map.fromEntries(
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basicDemos.map((d) => MapEntry(d.route, d.builder)));
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final String title;
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Map<String, WidgetBuilder> miscDemoRoutes = Map.fromEntries(
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miscDemos.map((d) => MapEntry(d.route, d.builder)));
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@override
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_MyHomePageState createState() => _MyHomePageState();
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}
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Map<String, WidgetBuilder> allRoutes = <String, WidgetBuilder>{
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...basicDemoRoutes,
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...miscDemoRoutes,
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};
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class _MyHomePageState extends State<MyHomePage> {
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int _counter = 0;
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class AnimationsSamples extends StatelessWidget {
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Widget build(BuildContext context) {
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void _incrementCounter() {
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setState(() {
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// This call to setState tells the Flutter framework that something has
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// changed in this State, which causes it to rerun the build method below
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// so that the display can reflect the updated values. If we changed
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// _counter without calling setState(), then the build method would not be
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// called again, and so nothing would appear to happen.
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_counter++;
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});
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return MaterialApp(
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title: 'Animations Samples',
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theme: ThemeData(
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primarySwatch: Colors.deepPurple,
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),
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routes: allRoutes,
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home: HomePage(),
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);
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}
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}
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class HomePage extends StatelessWidget {
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final TextStyle _headerStyle =
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TextStyle(fontWeight: FontWeight.bold, fontSize: 24);
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@override
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Widget build(BuildContext context) {
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// This method is rerun every time setState is called, for instance as done
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// by the _incrementCounter method above.
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//
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// The Flutter framework has been optimized to make rerunning build methods
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// fast, so that you can just rebuild anything that needs updating rather
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// than having to individually change instances of widgets.
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return Scaffold(
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appBar: AppBar(
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// Here we take the value from the MyHomePage object that was created by
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// the App.build method, and use it to set our appbar title.
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title: Text(widget.title),
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title: Text('Animation Examples'),
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),
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body: Center(
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// Center is a layout widget. It takes a single child and positions it
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// in the middle of the parent.
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child: Column(
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// Column is also layout widget. It takes a list of children and
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// arranges them vertically. By default, it sizes itself to fit its
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// children horizontally, and tries to be as tall as its parent.
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//
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// Invoke "debug painting" (press "p" in the console, choose the
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// "Toggle Debug Paint" action from the Flutter Inspector in Android
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// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
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// to see the wireframe for each widget.
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//
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// Column has various properties to control how it sizes itself and
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// how it positions its children. Here we use mainAxisAlignment to
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// center the children vertically; the main axis here is the vertical
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// axis because Columns are vertical (the cross axis would be
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// horizontal).
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mainAxisAlignment: MainAxisAlignment.center,
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body: ListView(
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children: <Widget>[
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Text(
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'You have pushed the button this many times:',
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),
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Text(
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'$_counter',
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style: Theme.of(context).textTheme.display1,
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),
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ListTile(title: Text('Basics', style: _headerStyle)),
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...basicDemos.map((d) => DemoTile(d)),
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ListTile(title: Text('Misc', style: _headerStyle)),
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...miscDemos.map((d) => DemoTile(d)),
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],
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),
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),
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floatingActionButton: FloatingActionButton(
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onPressed: _incrementCounter,
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tooltip: 'Increment',
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child: Icon(Icons.add),
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), // This trailing comma makes auto-formatting nicer for build methods.
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);
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}
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}
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class DemoTile extends StatelessWidget {
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final Demo demo;
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DemoTile(this.demo);
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Widget build(BuildContext context) {
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return ListTile(
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title: Text(demo.name),
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onTap: () {
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Navigator.pushNamed(context, demo.route);
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},
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);
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}
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}
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@ -0,0 +1,61 @@
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import 'package:flutter/material.dart';
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class AnimationControllerDemo extends StatefulWidget {
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static const String routeName = '/basics/animation_controller';
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_AnimationControllerDemoState createState() =>
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_AnimationControllerDemoState();
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}
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class _AnimationControllerDemoState extends State<AnimationControllerDemo>
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with SingleTickerProviderStateMixin {
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static const Duration _duration = Duration(seconds: 1);
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AnimationController controller;
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void initState() {
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super.initState();
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controller = AnimationController(vsync: this, duration: _duration)
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..addListener(() {
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// Marks the widget tree as dirty
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setState(() {});
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});
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}
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void dispose() {
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super.dispose();
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controller.dispose();
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}
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(),
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body: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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ConstrainedBox(
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constraints: BoxConstraints(maxWidth: 200),
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child: Text('${controller.value.toStringAsFixed(2)}',
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style: TextStyle(fontSize: 24)),
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),
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MaterialButton(
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color: Theme.of(context).primaryColor,
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child: Text(
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'animate',
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style: TextStyle(color: Colors.white),
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),
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onPressed: () {
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if (controller.status == AnimationStatus.completed) {
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controller.reverse();
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} else {
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controller.forward();
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}
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},
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)
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],
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),
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),
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);
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}
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}
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@ -0,0 +1,82 @@
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import 'package:flutter/material.dart';
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class ExpandCardDemo extends StatelessWidget {
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static String routeName = '/simple_expandable_card';
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text('Simple Expandable Card'),
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),
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body: Center(
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child: SimpleExpandableCard(),
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),
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);
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}
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}
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class SimpleExpandableCard extends StatefulWidget {
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_SimpleExpandableCardState createState() => _SimpleExpandableCardState();
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}
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class _SimpleExpandableCardState extends State<SimpleExpandableCard>
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with SingleTickerProviderStateMixin {
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static const Duration duration = Duration(milliseconds: 300);
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bool expanded = false;
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void initState() {
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super.initState();
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}
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void _toggleExpanded() {
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setState(() {
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expanded = !expanded;
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});
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}
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double get size => expanded ? 200 : 100;
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Widget build(context) {
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return GestureDetector(
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onTap: () => _toggleExpanded(),
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child: Card(
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child: AnimatedCrossFade(
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alignment: Alignment.center,
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duration: duration,
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crossFadeState:
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expanded ? CrossFadeState.showSecond : CrossFadeState.showFirst,
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firstChild: _ImageContainer(
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size: size, image: 'assets/wolf.jpg', duration: duration),
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secondChild: _ImageContainer(
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size: size, image: 'assets/cat.jpg', duration: duration),
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),
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),
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);
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}
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}
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class _ImageContainer extends StatelessWidget {
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final double size;
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final String image;
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final Duration duration;
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_ImageContainer({this.size, this.image, this.duration});
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.all(8.0),
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child: AnimatedContainer(
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duration: duration,
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width: size,
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height: size,
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decoration: BoxDecoration(
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color: Colors.transparent,
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image: DecorationImage(
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fit: BoxFit.cover,
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image: AssetImage(image),
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),
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),
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),
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);
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}
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}
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@ -1,72 +1,18 @@
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name: animations
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description: A new Flutter project.
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# The following defines the version and build number for your application.
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# A version number is three numbers separated by dots, like 1.2.43
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# followed by an optional build number separated by a +.
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# Both the version and the builder number may be overridden in flutter
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# build by specifying --build-name and --build-number, respectively.
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# In Android, build-name is used as versionName while build-number used as versionCode.
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# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
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# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
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# Read more about iOS versioning at
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# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
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version: 1.0.0+1
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environment:
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sdk: ">=2.1.0 <3.0.0"
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sdk: ">=2.3.0 <3.0.0"
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dependencies:
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flutter:
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sdk: flutter
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# The following adds the Cupertino Icons font to your application.
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# Use with the CupertinoIcons class for iOS style icons.
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cupertino_icons: ^0.1.2
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dev_dependencies:
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flutter_test:
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sdk: flutter
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# For information on the generic Dart part of this file, see the
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# following page: https://dart.dev/tools/pub/pubspec
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# The following section is specific to Flutter.
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flutter:
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# The following line ensures that the Material Icons font is
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# included with your application, so that you can use the icons in
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# the material Icons class.
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uses-material-design: true
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# To add assets to your application, add an assets section, like this:
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# assets:
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# - images/a_dot_burr.jpeg
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# - images/a_dot_ham.jpeg
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# An image asset can refer to one or more resolution-specific "variants", see
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# https://flutter.dev/assets-and-images/#resolution-aware.
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# For details regarding adding assets from package dependencies, see
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# https://flutter.dev/assets-and-images/#from-packages
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# To add custom fonts to your application, add a fonts section here,
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# in this "flutter" section. Each entry in this list should have a
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# "family" key with the font family name, and a "fonts" key with a
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# list giving the asset and other descriptors for the font. For
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# example:
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# fonts:
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# - family: Schyler
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# fonts:
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# - asset: fonts/Schyler-Regular.ttf
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# - asset: fonts/Schyler-Italic.ttf
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# style: italic
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# - family: Trajan Pro
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# fonts:
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# - asset: fonts/TrajanPro.ttf
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# - asset: fonts/TrajanPro_Bold.ttf
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# weight: 700
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#
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# For details regarding fonts from package dependencies,
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# see https://flutter.dev/custom-fonts/#from-packages
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assets:
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- assets/
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@ -1,30 +0,0 @@
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// This is a basic Flutter widget test.
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//
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// To perform an interaction with a widget in your test, use the WidgetTester
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// utility that Flutter provides. For example, you can send tap and scroll
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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:animations/main.dart';
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void main() {
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testWidgets('Counter increments smoke test', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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await tester.pumpWidget(MyApp());
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// Verify that our counter starts at 0.
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expect(find.text('0'), findsOneWidget);
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expect(find.text('1'), findsNothing);
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// Tap the '+' icon and trigger a frame.
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await tester.tap(find.byIcon(Icons.add));
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await tester.pump();
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// Verify that our counter has incremented.
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expect(find.text('0'), findsNothing);
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expect(find.text('1'), findsOneWidget);
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});
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}
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Loading…
Reference in new issue