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 static void DrawArrowEnd(Graphics g, PointF a1, PointF a2, Color clr, float arrowSize)
{
Brush b = GVGraphics.GetBrush(clr);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
double angle = -Math.Atan2(a2.Y - a1.Y, a2.X - a1.X);
PointF p1 = new PointF(a2.X - (float)(Math.Cos(angle - Math.PI / 8.0) * arrowSize), a2.Y + (float)(Math.Sin(angle - Math.PI / 8.0) * arrowSize));
PointF p2 = a2;
PointF p3 = new PointF(a2.X - (float)(Math.Cos(angle + Math.PI / 8.0) * arrowSize), a2.Y + (float)(Math.Sin(angle + Math.PI / 8.0) * arrowSize));
g.FillPolygon(b, new PointF[] { p1, p2, p3 });
}
public override void OnDraw(GVGraphViewContext context, RectangleF paintRect)
{
base.OnDraw(context, paintRect);
context.Graphics.DrawImage(GetTrackerIcon(), paintRect);
if (StatusHighlighted && !context.SelectedObject.PaintedRect.Contains(context.mouseMovePoint))
{
if (context.TrackedObject != null && context.TrackedObject.AcceptsTracker(this))
{
GVGraphics.DrawRectangleLine(context.Graphics, Pens.Black, context.SelectedObject.PaintedRect,
context.TrackedObject.PaintedRect);
}
else
{
GVGraphics.DrawRectangleLine(context.Graphics, Pens.Black,
context.SelectedObject.PaintedRect, context.mouseMovePoint);
}
}
}
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);
}
public virtual Brush GetBackgroundBrush()
{
if (StatusHighlighted)
{
switch (ClickType)
{
case GVObjectTrackerType.Click:
return(GVGraphics.GetBrush(Color.CadetBlue));
case GVObjectTrackerType.DragDrop:
return(GVGraphics.GetBrush(Color.MediumSeaGreen));
case GVObjectTrackerType.Switch:
return(GVGraphics.GetBrush(Color.MediumVioletRed));
default:
return(GVGraphics.GetBrush(Color.White));
}
}
else
{
switch (ClickType)
{
case GVObjectTrackerType.Click:
return(GVGraphics.GetBrush(Color.Teal));
case GVObjectTrackerType.DragDrop:
return(GVGraphics.GetBrush(Color.SeaGreen));
case GVObjectTrackerType.Switch:
return(GVGraphics.GetBrush(Color.Purple));
default:
return(GVGraphics.GetBrush(Color.Gray));
}
}
}