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36 lines
778 B
36 lines
778 B
4 years ago
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import 'package:flutter/material.dart';
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class BgPainter extends CustomPainter {
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final double bezierHeight;
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final Color bgColor ;
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BgPainter({
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this.bezierHeight = 10,
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this.bgColor = Colors.white,
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});
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@override
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void paint(Canvas canvas, Size size) {
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Path path = Path();
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//移动到点 P0点 也是曲线的起点
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path.lineTo(0, 0);
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path.lineTo(size.width, 0);
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path.lineTo(size.width, size.height - bezierHeight);
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path.quadraticBezierTo(size.width / 2.0, size.height, 0, size.height - bezierHeight);
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path.close();
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Paint paint = Paint()
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..color = bgColor
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..style = PaintingStyle.fill;
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canvas.drawPath(path, paint);
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
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}
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