CGPath?GetRoundedPath(CGRect rect, nfloat left, nfloat top, nfloat right, nfloat bottom)
{
#if __IOS__
var path = new UIBezierPath();
#else
var path = new NSBezierPath();
#endif
path.MoveTo(new CGPoint(rect.Width - right, rect.Y));
path.AddArc(new CGPoint((float)rect.X + rect.Width - right, (float)rect.Y + right), (nfloat)right, (float)(Math.PI * 1.5), (float)Math.PI * 2, true);
path.AddLineTo(new CGPoint(rect.Width, rect.Height - bottom));
path.AddArc(new CGPoint((float)rect.X + rect.Width - bottom, (float)rect.Y + rect.Height - bottom), (nfloat)bottom, 0, (float)(Math.PI * .5), true);
path.AddLineTo(new CGPoint(left, rect.Height));
path.AddArc(new CGPoint((float)rect.X + left, (float)rect.Y + rect.Height - left), (nfloat)left, (float)(Math.PI * .5), (float)Math.PI, true);
path.AddLineTo(new CGPoint(rect.X, top));
path.AddArc(new CGPoint((float)rect.X + top, (float)rect.Y + top), (nfloat)top, (float)Math.PI, (float)(Math.PI * 1.5), true);
path.ClosePath();
#if __IOS__
return(path.CGPath);
#else
return(path.ToCGPath());
#endif
}
public static NSBezierPath CreatePolygonPath(this CGRect rect, int sides, double cornerRadius = 0.0, double rotationOffset = 0.0)
{
var offsetRadians = rotationOffset * Math.PI / 180;
var path = new NSBezierPath();
var theta = 2 * Math.PI / sides;
var width = (-cornerRadius + Math.Min(rect.Size.Width, rect.Size.Height)) / 2;
var center = new CGPoint(rect.Width / 2, rect.Height / 2);
var radius = width + cornerRadius - (Math.Cos(theta) * cornerRadius) / 2;
var angle = offsetRadians;
var corner = new CGPoint(center.X + (radius - cornerRadius) * Math.Cos(angle), center.Y + (radius - cornerRadius) * Math.Sin(angle));
path.MoveTo(new CGPoint(corner.X + cornerRadius * Math.Cos(angle + theta), corner.Y + cornerRadius * Math.Sin(angle + theta)));
for (var i = 0; i < sides; i++)
{
angle += theta;
corner = new CGPoint(center.X + (radius - cornerRadius) * Math.Cos(angle), center.Y + (radius - cornerRadius) * Math.Sin(angle));
var tip = new CGPoint(center.X + radius * Math.Cos(angle), center.Y + radius * Math.Sin(angle));
var start = new CGPoint(corner.X + cornerRadius * Math.Cos(angle - theta), corner.Y + cornerRadius * Math.Sin(angle - theta));
var end = new CGPoint(corner.X + cornerRadius * Math.Cos(angle + theta), corner.Y + cornerRadius * Math.Sin(angle + theta));
path.AddLineTo(start);
path.AddQuadCurveToPoint(end, tip);
}
path.ClosePath();
return(path);
}
public static NSBezierPath CreateRoundedRectPath(this CGRect rect, CornerRadius cornerRadius)
{
var path = new NSBezierPath();
path.MoveTo(new CGPoint(rect.Width - cornerRadius.TopRight, rect.Y));
path.AddArc(new CGPoint((float)rect.X + rect.Width - cornerRadius.TopRight, (float)rect.Y + cornerRadius.TopRight), (nfloat)cornerRadius.TopRight, (float)(Math.PI * 1.5), (float)Math.PI * 2, true);
path.AddLineTo(new CGPoint(rect.Width, rect.Height - cornerRadius.BottomRight));
path.AddArc(new CGPoint((float)rect.X + rect.Width - cornerRadius.BottomRight, (float)rect.Y + rect.Height - cornerRadius.BottomRight), (nfloat)cornerRadius.BottomRight, 0, (float)(Math.PI * .5), true);
path.AddLineTo(new CGPoint(cornerRadius.BottomLeft, rect.Height));
path.AddArc(new CGPoint((float)rect.X + cornerRadius.BottomLeft, (float)rect.Y + rect.Height - cornerRadius.BottomLeft), (nfloat)cornerRadius.BottomLeft, (float)(Math.PI * .5), (float)Math.PI, true);
path.AddLineTo(new CGPoint(rect.X, cornerRadius.TopLeft));
path.AddArc(new CGPoint((float)rect.X + cornerRadius.TopLeft, (float)rect.Y + cornerRadius.TopLeft), (nfloat)cornerRadius.TopLeft, (float)Math.PI, (float)(Math.PI * 1.5), true);
path.ClosePath();
return(path);
}