paint method
Implementation
void paint(Context context, PdfRect box) {
// Ellipse 4-spline magic number
const _m4 = 0.551784;
context.canvas
// Start
..moveTo(box.x, box.y + bottomLeft.y)
// bottomLeft
..curveTo(
box.x,
box.y - _m4 * bottomLeft.y + bottomLeft.y,
box.x - _m4 * bottomLeft.x + bottomLeft.x,
box.y,
box.x + bottomLeft.x,
box.y)
// bottom
..lineTo(box.x + box.width - bottomRight.x, box.y)
// bottomRight
..curveTo(
box.x + _m4 * bottomRight.x + box.width - bottomRight.x,
box.y,
box.x + box.width,
box.y - _m4 * bottomRight.y + bottomRight.y,
box.x + box.width,
box.y + bottomRight.y)
// right
..lineTo(box.x + box.width, box.y + box.height - topRight.y)
// topRight
..curveTo(
box.x + box.width,
box.y + _m4 * topRight.y + box.height - topRight.y,
box.x + _m4 * topRight.x + box.width - topRight.x,
box.y + box.height,
box.x + box.width - topRight.x,
box.y + box.height)
// top
..lineTo(box.x + topLeft.x, box.y + box.height)
// topLeft
..curveTo(
box.x - _m4 * topLeft.x + topLeft.x,
box.y + box.height,
box.x,
box.y + _m4 * topLeft.y + box.height - topLeft.y,
box.x,
box.y + box.height - topLeft.y)
// left
..lineTo(box.x, box.y + bottomLeft.y);
}