flyinsonolite/lib/controls/diagonalpainter.dart

import 'package:flutter/material.dart';
import 'package:flyinsonolite/infrastructure/scale.dart';

class DiagonalPainter extends CustomPainter {
  final Color color;
  DiagonalPainter(this.color);
  @override
  void paint(Canvas canvas, Size size) {
    final paint = Paint()
      ..color = color
      ..style = PaintingStyle.fill
      ..strokeWidth = 2.s;

    final path = Path()
      ..moveTo(0, 0)
      ..lineTo(64.s, 64.s)
      ..lineTo(64.s, 8.s)
      ..quadraticBezierTo(64.s, 0, 56.s, 0)
      ..lineTo(0, 0)
      ..close();

    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(covariant DiagonalPainter oldDelegate) {
    ///此处可以设置颜色动态值
    return oldDelegate.color != color;
  }
}