getClip method

@override Path getClip(Size size)

Returns a description of the clip given that the render object being clipped is of the given size.

Implementation

@override
Path getClip(Size size) {
  var path = Path();

  if (size.height >= centreHeight) {
    // Prevent curveHeight from being larger than available space
    if (curveHeight > (size.height - centreHeight)) {
      curveHeight = size.height - centreHeight;
    }

    path.lineTo(0.0, centreHeight);

    // Adjusting control points of the curves to avoid the circular shape
    path.quadraticBezierTo(size.width / 4, centreHeight + curveHeight,
        (size.width / 2) - (0 / 2), centreHeight + curveHeight);

    path.quadraticBezierTo(
        (size.width / 2) - (0 / 4),
        centreHeight + curveHeight,
        size.width / 2,
        centreHeight + curveHeight);

    path.quadraticBezierTo(
        (size.width / 2) + (0 / 4),
        centreHeight + curveHeight - 0,
        (size.width / 2) + (0 / 2),
        centreHeight + curveHeight);

    path.quadraticBezierTo(size.width * 3 / 4, centreHeight + curveHeight,
        size.width, centreHeight);

    path.lineTo(size.width, 0.0);
    path.lineTo(0.0, 0.0);
  } else {
    path.lineTo(0.0, size.height);
    path.lineTo(size.width, size.height);
    path.lineTo(size.width, 0.0);
    path.lineTo(0.0, 0.0);
  }

  return path;
}