default_clip.dart

class ZigZagClipper extends CustomClipper<Path> {
  ClipType clipType;

  ZigZagClipper(this.clipType);

 @override
  Path getClip(Size size) {
    Path path = Path(); // the starting point is the 0,0 position of the widget.
    path.lineTo(0, size.height); // this draws the line from current point to the left bottom position of widget
    path.lineTo(size.width, size.height); // this draws the line from current point to the right bottom position of the widget.
    path.lineTo(size.width, 0); // this draws the line from current point to the right top position of the widget 
    path.close(); // this closes the loop from current position to the starting point of widget 
    return path;
  }
  
  @override
  bool shouldReclip(CustomClipper<Path> oldClipper) {
    // TODO: implement shouldReclip
    return true;
  }
}