Created
December 6, 2019 12:53
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| import 'package:flutter/material.dart'; | |
| void main() { | |
| runApp(MyApp()); | |
| } | |
| class MyApp extends StatelessWidget { | |
| @override | |
| Widget build(BuildContext context) { | |
| return MaterialApp( | |
| theme: ThemeData.light(), | |
| debugShowCheckedModeBanner: false, | |
| home: Scaffold( | |
| body: Center( | |
| child: TriangleError(), | |
| ), | |
| ), | |
| ); | |
| } | |
| } | |
| class TriangleError extends StatefulWidget { | |
| const TriangleError({Key key}) : super(key: key); | |
| @override | |
| _TriangleErrorState createState() => _TriangleErrorState(); | |
| } | |
| class _TriangleErrorState extends State<TriangleError> | |
| with TickerProviderStateMixin { | |
| AnimationController rotationController; | |
| @override | |
| void initState() { | |
| rotationController = AnimationController( | |
| duration: const Duration(milliseconds: 2000), | |
| vsync: this, | |
| )..repeat(); | |
| super.initState(); | |
| } | |
| @override | |
| Widget build(BuildContext context) { | |
| return Container( | |
| padding: EdgeInsets.all(10), | |
| child: Center( | |
| child: AspectRatio( | |
| aspectRatio: 1, | |
| child: Stack( | |
| children: <Widget>[ | |
| Align( | |
| alignment: Alignment.center, | |
| child: RotationTransition( | |
| turns: | |
| Tween(begin: 0.0, end: 1.0).animate(rotationController), | |
| child: ClipPath( | |
| clipper: TrianglePath(), | |
| child: LayoutBuilder( | |
| builder: (context, constrains) { | |
| return Container( | |
| // uncomment and reload view | |
| // color: Colors.red, | |
| decoration: BoxDecoration( | |
| gradient: LinearGradient( | |
| colors: [ | |
| Theme.of(context).primaryColorLight, | |
| Theme.of(context) | |
| .primaryColorLight | |
| .withAlpha(10) | |
| ], | |
| begin: Alignment.bottomCenter, | |
| end: Alignment.topCenter, | |
| ), | |
| ), | |
| margin: EdgeInsets.all(constrains.maxHeight / 8), | |
| ); | |
| }, | |
| ), | |
| ), | |
| ), | |
| ), | |
| ], | |
| ), | |
| ), | |
| ), | |
| ); | |
| } | |
| } | |
| class TrianglePath extends CustomClipper<Path> { | |
| var radius = 10.0; | |
| @override | |
| Path getClip(Size size) { | |
| Path path = Path(); | |
| path.lineTo(size.width / 4, 0); | |
| path.lineTo(size.width / 2, size.height / 2); | |
| path.lineTo(size.width - size.width / 4, 0); | |
| path.lineTo(0, 0); | |
| return path; | |
| } | |
| @override | |
| bool shouldReclip(CustomClipper<Path> oldClipper) => false; | |
| } |
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load animation then uncomment and reload view