private RectangleF GetRectangleForSize(SizeF sz)
{
if (Source == null || Target == null)
{
return(RectangleF.Empty);
}
PointF p1 = GVGraphics.GetCenterPoint(Source.PaintedRect);
PointF p2 = GVGraphics.GetCenterPoint(Target.PaintedRect);
return(new RectangleF((p1.X + p2.X - sz.Width) / 2, (p1.Y + p2.Y - sz.Height) / 2,
sz.Width, sz.Height));
}
public virtual void Paint(GVGraphViewContext context)
{
RectangleF rectA = Source.PaintedRect;
RectangleF rectB = Target.PaintedRect;
RectSide rsa, rsb;
PointF border1 = GVGraphics.GetConnectorPoint(rectA, GVGraphics.GetCenterPoint(rectB), out rsa);
PointF border2 = GVGraphics.GetConnectorPoint(rectB, GVGraphics.GetCenterPoint(rectA), out rsb);
context.Graphics.DrawLine(LinePen, border1, border2);
if (ArrowSize > 0)
{
GVGraphics.DrawArrowEnd(context.Graphics, border1, border2, LinePen.Color, ArrowSize);
}
TitleRectangle = GetRectangleForSize(context.Graphics.MeasureString(Title, SystemFonts.MenuFont),
GVGraphics.GetCenterPoint(border1, border2));
context.Graphics.FillRectangle(SystemBrushes.Control, TitleRectangle.X, TitleRectangle.Y,
TitleRectangle.Width, TitleRectangle.Height);
context.Graphics.DrawString(Title, SystemFonts.MenuFont, Brushes.Black, TitleRectangle.Location);
}
