63 lines
1.5 KiB
Dart
63 lines
1.5 KiB
Dart
import 'dart:ui';
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import 'package:flutter/material.dart';
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import '../components/coordinate_pro.dart';
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/// create by 张风捷特烈 on 2020/5/1
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/// contact me by email 1981462002@qq.com
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/// 说明:
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class Paper extends StatelessWidget {
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const Paper({super.key});
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@override
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Widget build(BuildContext context) {
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return Container(
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color: Colors.white,
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child: CustomPaint(
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// 使用CustomPaint
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painter: PaperPainter(),
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),
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);
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}
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}
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class PaperPainter extends CustomPainter {
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final Coordinate coordinate = Coordinate();
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Offset p1 = Offset(100, 100);
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Offset p2 = Offset(120, -60);
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Paint _helpPaint = Paint();
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@override
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void paint(Canvas canvas, Size size) {
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coordinate.paint(canvas, size);
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canvas.translate(size.width / 2, size.height / 2);
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Paint paint = Paint()
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..color = Colors.orange
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..style = PaintingStyle.stroke
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..strokeWidth = 2;
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Path path = Path();
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path.quadraticBezierTo(p1.dx, p1.dy, p2.dx, p2.dy);
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canvas.drawPath(path, paint);
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_drawHelp(canvas);
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}
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void _drawHelp(Canvas canvas) {
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_helpPaint
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..color = Colors.purple
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..style = PaintingStyle.stroke
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..strokeCap = StrokeCap.round;
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canvas.drawPoints(PointMode.lines,[Offset.zero, p1, p1,p2], _helpPaint..strokeWidth=1);
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canvas.drawPoints(PointMode.points, [Offset.zero, p1, p1, p2],
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_helpPaint..strokeWidth = 8);
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) => false;
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}
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