57 lines
1.1 KiB
Dart
57 lines
1.1 KiB
Dart
import 'dart:math';
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
import '../components/coordinate.dart';
|
|
|
|
/// create by 张风捷特烈 on 2020/5/1
|
|
/// contact me by email 1981462002@qq.com
|
|
/// 说明:
|
|
|
|
|
|
class Paper extends StatelessWidget {
|
|
const Paper({super.key});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
color: Colors.white,
|
|
child: CustomPaint(
|
|
// 使用CustomPaint
|
|
painter: PaperPainter(),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class PaperPainter extends CustomPainter {
|
|
|
|
|
|
final Coordinate coordinate = Coordinate();
|
|
|
|
|
|
@override
|
|
void paint(Canvas canvas, Size size) {
|
|
coordinate.paint(canvas, size);
|
|
canvas.translate(size.width / 2, size.height / 2);
|
|
|
|
Path path = Path();
|
|
Paint paint = Paint()
|
|
..color = Colors.purple
|
|
..style = PaintingStyle.fill;
|
|
path
|
|
..relativeMoveTo(0, 0)
|
|
..relativeLineTo(-30, 120)
|
|
..relativeLineTo(30, -30)
|
|
..relativeLineTo( 30,30)
|
|
..close();
|
|
|
|
for(int i=0;i<8;i++){
|
|
canvas.drawPath(path.transform(Matrix4.rotationZ(i*pi/4).storage), paint);
|
|
}
|
|
}
|
|
|
|
@override
|
|
bool shouldRepaint(CustomPainter oldDelegate) => false;
|
|
}
|