Last active
August 21, 2021 01:44
-
-
Save wmleler/cfc18137ce7db77d7e599e179dee4619 to your computer and use it in GitHub Desktop.
Matrix #2
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// v2: add Gesture detector | |
import 'package:flutter/material.dart'; | |
void main() => runApp(MyApp()); | |
class MyApp extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
title: 'Perspective', | |
theme: ThemeData( | |
primarySwatch: Colors.blue, | |
), | |
home: MyHomePage(), | |
); | |
} | |
} | |
class MyHomePage extends StatefulWidget { | |
MyHomePage({Key key}) : super(key: key); // changed | |
@override | |
_MyHomePageState createState() => _MyHomePageState(); | |
} | |
class _MyHomePageState extends State<MyHomePage> { | |
int _counter = 0; | |
Offset _offset = Offset.zero; // changed | |
void _incrementCounter() { | |
setState(() { | |
_counter++; | |
}); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Transform( // Transform widget | |
transform: Matrix4.identity() | |
..setEntry(3, 2, 0.001) // perspective | |
..rotateX(0.01 * _offset.dy) // changed | |
..rotateY(-0.01 * _offset.dx), // changed | |
alignment: FractionalOffset.center, | |
child: GestureDetector( // new | |
onPanUpdate: (details) => setState(() => _offset += details.delta), | |
onDoubleTap: () => setState(() => _offset = Offset.zero), | |
child: _defaultApp(context), | |
) | |
); | |
} | |
_defaultApp(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar( | |
title: Text('The Matrix 3D'), // changed | |
), | |
body: Center( | |
child: Column( | |
mainAxisAlignment: MainAxisAlignment.center, | |
children: [ | |
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), | |
), | |
); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment