public override Point GetLineAnchorLocation(DiagramItemBase toItem, Point toPoint, int toItemDiagramLinesCount, int toItemDiagramLinesNumber, bool isSelfStart)
{
Point p = new Point();
Point p2 = new Point();
Point pTo = new Point();
Line2D firstLineSelf;
if (toItem != null)
{
pTo.X = Canvas.GetLeft(toItem) + toItem.ActualWidth / 2;
pTo.Y = Canvas.GetTop(toItem) + toItem.ActualHeight / 2;
}
else
{
pTo = toPoint;
}
double tX = Canvas.GetLeft(this) + this.ActualWidth / 2;
double tY = Canvas.GetTop(this) + this.ActualHeight / 2;
double testX = pTo.X - tX;
double testY = pTo.Y - tY;
if (testX == 0)
{
testX = 0.001;
}
if (testY == 0)
{
testY = 0.001;
}
double ovalX = Canvas.GetLeft(this) + this.Width / 2;
double ovalY = Canvas.GetTop(this) + this.Height / 2;
double ovalR2 = this.Width / 2;
double ovalR1 = this.Height / 2;
Oval o = new Oval(ovalX, ovalY, ovalR1, ovalR2);
if (toItemDiagramLinesCount > 1)
{
if (toItem == this)
{
if (isSelfStart)
{
p.X = Canvas.GetLeft(this) + ((((double)toItemDiagramLinesNumber) / 2 + 1) / ((double)toItemDiagramLinesCount + 1) * this.ActualWidth);
p.Y = tY - this.ActualHeight / 2;
p2.X = Canvas.GetLeft(this) + ((((double)toItemDiagramLinesNumber) / 2 + 1) / ((double)toItemDiagramLinesCount + 1) * this.ActualWidth);
p2.Y = tY - this.ActualHeight;
firstLineSelf = Geometry2D.GetLine2DFromPoints(p, p2);
return(Geometry2D.GetOvalLineCross(firstLineSelf, o)[0]);
}
else
{
p.X = tX + this.ActualWidth / 2;
p.Y = Canvas.GetTop(this) + (((double)(toItemDiagramLinesCount - ((double)toItemDiagramLinesNumber) / 2)) / ((double)toItemDiagramLinesCount + 1) * this.ActualHeight);
p2.X = tX + this.ActualWidth;
p2.Y = Canvas.GetTop(this) + (((double)(toItemDiagramLinesCount - ((double)toItemDiagramLinesNumber) / 2)) / ((double)toItemDiagramLinesCount + 1) * this.ActualHeight);
firstLineSelf = Geometry2D.GetLine2DFromPoints(p, p2);
return(Geometry2D.GetOvalLineCross(firstLineSelf, o)[1]);
}
}
Point pFrom = new Point();
pFrom.X = tX;
if (testY <= 0)
{
pFrom.Y = Canvas.GetTop(this) + (((double)toItemDiagramLinesNumber + 1) / ((double)toItemDiagramLinesCount + 1) * this.ActualHeight / 2);
}
else
{
pFrom.Y = tY + (((double)toItemDiagramLinesNumber + 1) / ((double)toItemDiagramLinesCount + 1) * this.ActualHeight / 2);
}
Line2D firstLine = Geometry2D.GetLine2DFromPoints(pTo, pFrom);
// we have two:
// - line from pTo to pFrom (firstLine)
// - oval
if (testY <= 0 && testX <= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[0]);
}
if (testY <= 0 && testX >= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[1]);
}
if (testY >= 0 && testX >= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[1]);
}
if (testY >= 0 && testX <= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[0]);
}
}
else
{
if (toItem == this)
{
if (isSelfStart)
{
p.X = tX;
p.Y = tY - this.ActualHeight / 2;
return(p);
}
else
{
p.X = tX + this.ActualWidth / 2;
p.Y = tY;
return(p);
}
}
Point pFrom = new Point();
pFrom.X = tX;
pFrom.Y = tY;
Line2D firstLine = Geometry2D.GetLine2DFromPoints(pTo, pFrom);
if (testY <= 0 && testX <= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[0]);
}
if (testY <= 0 && testX >= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[1]);
}
if (testY >= 0 && testX >= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[1]);
}
if (testY >= 0 && testX <= 0)
{
return(Geometry2D.GetOvalLineCross(firstLine, o)[0]);
}
}
return(p);
}