clipper_radius.dart

@override
Path getClip(Size size) {
  
  double radius = 50;
  
  Path path = Path()
    ..lineTo(size.width - radius, 0)
    ..arcTo(
        Rect.fromPoints(
            Offset(size.width - radius, 0), Offset(size.width, radius)), // Rect
        1.5 * pi,   // Start engle
        0.5 * pi,  // Sweep engle
        true)  // direction clockwise
    ..lineTo(size.width, size.height - radius)
    ..arcTo(Rect.fromCircle(center: Offset(size.width - radius, size.height - radius), radius: radius), 0, 0.5 * pi, false)
    ..lineTo(radius, size.height)
    ..arcTo(Rect.fromLTRB(0, size.height - radius, radius, size.height), 0.5 * pi, 0.5 * pi, false)
    ..lineTo(0, radius)
    ..arcTo(Rect.fromLTWH(0, 0, 70, 100), 1 * pi, 0.5 * pi, false)
    ..close();

  return path;
}

`class TrianglePainter extends CustomPainter {
final Color strokeColor;
final PaintingStyle paintingStyle;
final double strokeWidth;

TrianglePainter(
{this.strokeColor = Colors.black,
this.strokeWidth = 3,
this.paintingStyle = PaintingStyle.stroke});

@OverRide
void paint(Canvas canvas, Size size) {
Paint paint = Paint()
..color = strokeColor
..strokeWidth = strokeWidth
..style = paintingStyle;

canvas.drawPath(getTrianglePath(size.width, size.height), paint);

}

Path getTrianglePath(double x, double y) {
return Path()
..moveTo(0, y)
..lineTo(x / 2, 0)
..lineTo(x, y)
..lineTo(0, y);
}

@OverRide
bool shouldRepaint(TrianglePainter oldDelegate) {
return oldDelegate.strokeColor != strokeColor ||
oldDelegate.paintingStyle != paintingStyle ||
oldDelegate.strokeWidth != strokeWidth;
}
}`