class RecTrianglePainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    log(size.height.toString());
    log(size.width.toString());
    final shape = Path()
      ..lineTo(0, size.height * 0.7)
      ..lineTo(size.width / 2, size.height)
      ..lineTo(size.width, size.width * 0.7)
      ..lineTo(size.width, 0)
      ..close();
      // Rect.
    final pp = Paint()..color = Colors.pink;
    canvas.drawPath(shape, pp);
  }

  @override
  bool shouldRepaint(RecTrianglePainter oldDelegate) => false;

  @override
  bool shouldRebuildSemantics(RecTrianglePainter oldDelegate) => false;
}