/// <summary>
/// Adds a round rectangle to the graphics path where the integer radius specified determines how rounded the rectangle should become.
/// This can be thought of rounded arcs connected by straight lines.
/// </summary>
/// <param name="self"></param>
/// <param name="bounds"></param>
/// <param name="radius"></param>
public static void AddRoundedRectangle(this GraphicsPath self, Rectangle bounds, int radius)
{
if (radius * 2 > bounds.Width)
{
self.AddEllipse(bounds);
return;
}
if (radius <= 0)
{
self.AddRectangle(bounds);
return;
}
int w = radius * 2;
Rectangle br = new Rectangle(bounds.Right - w, bounds.Bottom - w, w, w);
Rectangle bl = new Rectangle(bounds.Left, bounds.Bottom - w, w, w);
Rectangle tl = new Rectangle(bounds.Left, bounds.Top, w, w);
Rectangle tr = new Rectangle(bounds.Right - w, bounds.Top, w, w);
self.AddArc(br, 0, 90F);
self.AddLine(new Point(bounds.Right - radius, bounds.Bottom), new Point(bounds.Left + radius, bounds.Bottom));
self.AddArc(bl, 90F, 90F);
self.AddLine(new Point(bounds.Left, bounds.Bottom - radius), new Point(bounds.Left, bounds.Top + radius));
self.AddArc(tl, 180F, 90F);
self.AddLine(new Point(bounds.Left + radius, bounds.Top), new Point(bounds.Right - radius, bounds.Top));
self.AddArc(tr, 270F, 90F);
self.AddLine(new Point(bounds.Right, bounds.Top + radius), new Point(bounds.Right, bounds.Bottom - radius));
self.CloseFigure();
}
public static void AddCapsule(this GraphicsPath graphicsPath, RectangleF rect)
{
float diameter;
RectangleF arc;
try
{
if (rect.Width > rect.Height)
{
// Horizontal capsule
diameter = rect.Height;
SizeF sizeF = new SizeF(diameter, diameter);
arc = new RectangleF(rect.Location, sizeF);
graphicsPath.AddArc(arc, 90, 180);
arc.X = rect.Right - diameter;
graphicsPath.AddArc(arc, 270, 180);
}
else if (rect.Width < rect.Height)
{
// Vertical capsule
diameter = rect.Width;
SizeF sizeF = new SizeF(diameter, diameter);
arc = new RectangleF(rect.Location, sizeF);
graphicsPath.AddArc(arc, 180, 180);
arc.Y = rect.Bottom - diameter;
graphicsPath.AddArc(arc, 0, 180);
}
else
{
// Circle
graphicsPath.AddEllipse(rect);
}
}
catch
{
graphicsPath.AddEllipse(rect);
}
graphicsPath.CloseFigure();
}
/// <summary>
/// Adds an ellipse to the path at the specified <paramref name="location"/>
/// </summary>
/// <param name="path">Path to add the ellipse to</param>
/// <param name="location">Location of the bounding rectangle of the ellipse</param>
public static void AddEllipse (this IGraphicsPath path, RectangleF location)
{
path.AddEllipse (location.X, location.Y, location.Width, location.Height);
}
