/// <summary>Draws a rectangle with rounded corners</summary>
public static void DrawRectangleRounded(this Graphics gfx, Pen pen, RectangleF rect, float radius)
{
gfx.DrawPath(pen, Gdi.RoundedRectanglePath(rect, radius));
}
/// <summary>Fill a rectangle with rounded corners</summary>
public static void FillRectangleRounded(this Graphics gfx, Brush brush, RectangleF rect, float radius)
{
gfx.FillPath(brush, Gdi.RoundedRectanglePath(rect, radius));
}
/// <summary>Generates the boundary of the hint balloon</summary>
private GraphicsPath GeneratePath(bool region_border)
{
var width = Width + (region_border ? 1 : 0);
var height = Height + (region_border ? 1 : 0);
var cr = Math.Max(1, CornerRadius);
GraphicsPath path;
if (TipLength == 0 || TipBaseWidth == 0)
{
path = Gdi.RoundedRectanglePath(new RectangleF(0, 0, width, height), cr);
}
else
{
var tip_length = TipLength;
var tip_width = Math_.Clamp(width - 2 * (tip_length + cr), Math.Min(5, TipBaseWidth), TipBaseWidth);
// Find the corner to start from
path = new GraphicsPath();
switch (TipCorner)
{
default:
Debug.Assert(false, "Unknown corner");
break;
case ETipCorner.TopLeft:
path.AddLine(0, 0, tip_length + cr + tip_width, tip_length);
path.AddArc(width - tip_length - cr, tip_length, cr, cr, 270f, 90f);
path.AddArc(width - tip_length - cr, height - tip_length - cr, cr, cr, 0f, 90f);
path.AddArc(tip_length, height - tip_length - cr, cr, cr, 90f, 90f);
path.AddArc(tip_length, tip_length, cr, cr, 180f, 90f);
path.AddLine(tip_length + cr, tip_length, 0, 0);
break;
case ETipCorner.TopRight:
path.AddLine(width, 0, width - tip_length - cr, tip_length);
path.AddArc(width - tip_length - cr, tip_length, cr, cr, 270f, 90f);
path.AddArc(width - tip_length - cr, height - tip_length - cr, cr, cr, 0f, 90f);
path.AddArc(tip_length, height - tip_length - cr, cr, cr, 90f, 90f);
path.AddArc(tip_length, tip_length, cr, cr, 180f, 90f);
path.AddLine(tip_length + cr, tip_length, width - tip_length - cr - tip_width, tip_length);
path.AddLine(width - tip_length - cr - tip_width, tip_length, width, 0);
break;
case ETipCorner.BottomLeft:
path.AddLine(0, height, tip_length + cr, height - tip_length);
path.AddArc(tip_length, height - tip_length - cr, cr, cr, 90f, 90f);
path.AddArc(tip_length, tip_length, cr, cr, 180f, 90f);
path.AddArc(width - tip_length - cr, tip_length, cr, cr, 270f, 90f);
path.AddArc(width - tip_length - cr, height - tip_length - cr, cr, cr, 0f, 90f);
path.AddLine(width - tip_length - cr, height - tip_length, tip_length + cr + tip_width, height - tip_length);
path.AddLine(tip_length + cr + tip_width, height - tip_length, 0, height);
break;
case ETipCorner.BottomRight:
path.AddLine(width, height, width - tip_length - cr - tip_width, height - tip_length);
path.AddArc(tip_length, height - tip_length - cr, cr, cr, 90f, 90f);
path.AddArc(tip_length, tip_length, cr, cr, 180f, 90f);
path.AddArc(width - tip_length - cr, tip_length, cr, cr, 270f, 90f);
path.AddArc(width - tip_length - cr, height - tip_length - cr, cr, cr, 0f, 90f);
path.AddLine(width - tip_length - cr, height - tip_length, width, height);
break;
}
}
return(path);
}
