diff --git a/lib/main.dart b/lib/main.dart index 94b23e9..4e305b7 100644 --- a/lib/main.dart +++ b/lib/main.dart @@ -1,109 +1,16 @@ +import 'package:animations/res/home_page.dart'; import 'package:flutter/material.dart'; void main() => runApp(new MyApp()); + class MyApp extends StatelessWidget { - // This widget is the root of your application. @override Widget build(BuildContext context) { return new MaterialApp( title: 'Flutter Demo', - theme: new 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 press Run > Flutter Hot Reload in IntelliJ). Notice that the - // counter didn't reset back to zero; the application is not restarted. - primarySwatch: Colors.blue, - ), - home: new MyHomePage(title: 'Flutter Demo Home Page'), + home: new MyHomePage(title: 'Animations'), ); } } -class MyHomePage extends StatefulWidget { - MyHomePage({Key key, 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 - _MyHomePageState createState() => new _MyHomePageState(); -} - -class _MyHomePageState extends State { - int _counter = 0; - - 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 new Scaffold( - appBar: new 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: new Text(widget.title), - ), - body: new Center( - // Center is a layout widget. It takes a single child and positions it - // in the middle of the parent. - child: new Column( - // Column is also 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 paint" (press "p" in the console where you ran - // "flutter run", or select "Toggle Debug Paint" from the Flutter tool - // window in IntelliJ) 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: [ - new Text( - 'You have pushed the button this many times:', - ), - new Text( - '$_counter', - style: Theme.of(context).textTheme.display1, - ), - ], - ), - ), - floatingActionButton: new FloatingActionButton( - onPressed: _incrementCounter, - tooltip: 'Increment', - child: new Icon(Icons.add), - ), // This trailing comma makes auto-formatting nicer for build methods. - ); - } -} diff --git a/lib/res/home_page.dart b/lib/res/home_page.dart new file mode 100644 index 0000000..8671750 --- /dev/null +++ b/lib/res/home_page.dart @@ -0,0 +1,72 @@ +import 'package:flutter/material.dart'; + +const Duration duration = Duration( + milliseconds: 700, +); + +class MyHomePage extends StatefulWidget { + MyHomePage({Key key, this.title}) : super(key: key); + final String title; + + @override + _MyHomePageState createState() => new _MyHomePageState(); +} + +class _MyHomePageState extends State with TickerProviderStateMixin { + //TODO:[2] Declare the required variable and initialize it in initState +// bool isFirstVisible; +// +// @override +// void initState() { +// super.initState(); +// +// isFirstVisible = true; +// } + + @override + Widget build(BuildContext context) { + return new Scaffold( + appBar: new AppBar( + title: new Text(widget.title), + ), + body: new Center( +//TODO:[1] Declare AnimatedCrossFade and its properties +// child: AnimatedCrossFade( + //TODO:[]Okay so, the transition seems a little bit odd lets work it out +//// layoutBuilder: (Widget firstChild, Key firstChildKey, Widget secondChild, Key secondChildKey,){ +//// +//// return Stack( +//// alignment: Alignment.center, +//// children: [ +//// firstChild, +//// secondChild, +//// ], +//// ); +//// +//// }, +// firstChild: FlutterLogo( +// size: 100.0, +// ), +// secondChild: Container( +// color: Colors.purple, +// height: 200.0, +// width: 150.0, +// ), +// crossFadeState: isFirstVisible +// ? CrossFadeState.showFirst +// : CrossFadeState.showSecond, +// duration: duration, +// ), + ), + //TODO:[3] You'll need something to trigger your animation here it is + floatingActionButton: new FloatingActionButton( + onPressed: () { +// isFirstVisible = !isFirstVisible; +// setState(() {}); + }, + tooltip: 'Animate', + child: new Icon(Icons.play_arrow), + ), + ); + } +}