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February 7, 2023 02:55
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import 'package:flutter/material.dart'; | |
void main() => runApp(MyApp()); | |
class MyApp extends StatelessWidget { | |
// This widget is the root of your application. | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
// Application name | |
title: 'Flutter Stateful Clicker Counter', | |
theme: ThemeData( | |
// Application theme data, you can set the colors for the application as | |
// you want | |
primarySwatch: Colors.blue, | |
), | |
home: MyHomePage(title: 'Flutter Demo Clicker Counter Home Page'), | |
); | |
} | |
} | |
class MyHomePage extends StatefulWidget { | |
final String title; | |
const MyHomePage({Key? key, required this.title}) : super(key: key); | |
@override | |
_MyHomePageState createState() => _MyHomePageState(); | |
} | |
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin{ | |
int _counter = 0; | |
void _incrementCounter() { | |
setState(() { | |
_counter++; | |
}); | |
} | |
void showValue(val){ | |
double f = val; | |
setState(() { | |
_counter ; | |
}); | |
} | |
double changeX = 0; | |
bool isStart = false; | |
late AnimationController animCtrl; | |
late Animation growAnimation; | |
final shape_painter = ShapePainter(100); | |
@override | |
initState(){ | |
animCtrl = AnimationController(vsync: this, duration: Duration(seconds: 3)) | |
..addListener(() { | |
//_incrementCounter(); | |
showValue(growAnimation.value); | |
// print('GrowAnimation value: ${growAnimation.value}'); | |
}); | |
growAnimation = Tween<double>(begin: 0, end: 200).animate(animCtrl); | |
animCtrl.forward(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar( | |
title: Text(widget.title), | |
), | |
body: Center( | |
child: Wrap( | |
children: <Widget>[ | |
Text( | |
'You have pushed the button this many times:', | |
), | |
Text( | |
'$_counter', | |
style: TextStyle(fontSize: 25), | |
), | |
// Container( | |
// width: 50, | |
// height:100, | |
// child: | |
// CustomPaint( | |
// painter: ShapePainter(growAnimation.value), | |
// child: Container( | |
// height: 100, | |
// width: 100, | |
// )), | |
Row( | |
children: [ | |
// left handle | |
GestureDetector( | |
onHorizontalDragStart: (DragStartDetails details){ | |
print("st: ${details.localPosition.dx}"); | |
// dx for start is the x offset of the mouse relative to the container | |
changeX = (_counter as double) - details.localPosition.dx.floor(); | |
}, | |
onHorizontalDragUpdate: (DragUpdateDetails details) { | |
setState((){ | |
// print(details.localPosition.dx); | |
_counter = changeX.floor() + details.localPosition.dx.floor(); | |
}); | |
}, | |
child: | |
Container( | |
decoration: BoxDecoration( | |
color: Colors.red, | |
borderRadius: BorderRadius.only( | |
topLeft: Radius.circular(20), | |
bottomLeft: Radius.circular(20), | |
) | |
), | |
width:10, height:200) | |
), | |
Container( | |
// padding: const EdgeInsets.fromLTRB(20, 0, 20, 0), | |
child: | |
ClipRect( | |
child: | |
Container( | |
width: _counter+0.2, | |
height:200, | |
child: | |
AnimatedBuilder( | |
animation: growAnimation, | |
builder: (context, snapshot) { | |
return CustomPaint( | |
painter: ShapePainter(50), | |
child: Container(width: 100, height:100), | |
); | |
}, | |
) | |
) | |
) | |
), | |
GestureDetector( | |
onHorizontalDragStart: (DragStartDetails details){ | |
print("st: ${details.localPosition.dx}"); | |
// dx for start is the x offset of the mouse relative to the container | |
changeX = (_counter as double) - details.localPosition.dx.floor(); | |
}, | |
onHorizontalDragUpdate: (DragUpdateDetails details) { | |
setState((){ | |
// print(details.localPosition.dx); | |
_counter = changeX.floor() + details.localPosition.dx.floor(); | |
}); | |
}, | |
child: Container( | |
width:10, | |
height:200, | |
decoration: BoxDecoration( | |
color: Colors.blue, | |
borderRadius: BorderRadius.only( | |
topRight: Radius.circular(20), | |
bottomRight: Radius.circular(20), | |
) | |
)) | |
), | |
] | |
) | |
], | |
), | |
), | |
floatingActionButton: FloatingActionButton( | |
onPressed: _incrementCounter, | |
tooltip: 'Increment', | |
child: Icon(Icons.add), | |
), | |
); | |
} | |
} | |
class ShapePainter extends CustomPainter { | |
var h =0.0; | |
var width =0.0; | |
ShapePainter(this.width); | |
@override | |
void paint(Canvas canvas, Size size) { | |
var paint = Paint() | |
..color = Colors.blue | |
..strokeWidth = 5 | |
..strokeCap = StrokeCap.round; | |
Offset startingPoint = Offset(0, size.height / 2); | |
Offset endingPoint = Offset(size.width, size.height / 2); | |
canvas.drawLine(startingPoint, endingPoint, paint); | |
paint | |
..color = Color(0xff638965) | |
..style = PaintingStyle.fill; | |
//a rectangle | |
canvas.drawRect(Offset(0, 0) & Size(200, 200), paint); | |
//canvas.clipRect; | |
} | |
@override | |
bool shouldRepaint(CustomPainter oldDelegate) { | |
return false; | |
} | |
} |
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