public virtual float GetAngle(IDiagramLine link)
{
if (link == null)
{
return(0f);
}
IDiagramPort port1 = link.GetOtherPort(this);
if (port1 == null)
{
if (((link.FromPort != null) && (link.FromPort.DiagramShape != null)) && (link.FromPort.DiagramShape.Bounds == this.Bounds))
{
port1 = link.ToPort;
}
else if (((link.ToPort != null) && (link.ToPort.DiagramShape != null)) && (link.ToPort.DiagramShape.Bounds == this.Bounds))
{
port1 = link.FromPort;
}
}
if (port1 == null)
{
return(0f);
}
DiagramShape obj1 = port1.DiagramShape;
if (obj1 == null)
{
return(0f);
}
PointF tf1 = obj1.Center;
PointF tf2 = base.Center;
Shapes.LineGraph link1 = link as Shapes.LineGraph;
if ((link1 == null) && (link is TextLine))
{
link1 = ((TextLine)link).RealLink;
}
if ((link1 != null) && (link1.PointsCount > 0))
{
if (link1.FromPort == port1)
{
tf1 = link1.GetPoint(0);
}
else
{
tf1 = link1.GetPoint(link1.PointsCount - 1);
}
}
return(StrokeGraph.GetAngle(tf1.X - tf2.X, tf1.Y - tf2.Y));
}
protected virtual void LayoutMidLabel(Dot.Utility.Media.Diagram.Shapes.DiagramShape childchanged)
{
DiagramShape obj1 = this.MidLabel;
if (obj1 != null)
{
Shapes.LineGraph link1 = this.RealLink;
int num1 = link1.PointsCount;
if (num1 >= 2)
{
if ((link1.Style == StrokeGraphStyle.Bezier) && (num1 < 7))
{
PointF tf5;
PointF tf6;
PointF tf1 = link1.GetPoint(0);
PointF tf2 = link1.GetPoint(1);
PointF tf3 = link1.GetPoint(num1 - 2);
PointF tf4 = link1.GetPoint(num1 - 1);
StrokeGraph.BezierMidPoint(tf1, tf2, tf3, tf4, out tf5, out tf6);
this.PositionMidLabel(obj1, tf5, tf6);
}
else
{
int num2 = num1 / 2;
if ((num1 % 2) == 0)
{
PointF tf7 = link1.GetPoint(num2 - 1);
PointF tf8 = link1.GetPoint(num2);
this.PositionMidLabel(obj1, tf7, tf8);
}
else
{
PointF tf9 = link1.GetPoint(num2 - 1);
PointF tf10 = link1.GetPoint(num2);
PointF tf11 = link1.GetPoint(num2 + 1);
float single1 = tf10.X - tf9.X;
float single2 = tf10.Y - tf9.Y;
float single3 = tf11.X - tf10.X;
float single4 = tf11.Y - tf10.Y;
if (((single1 * single1) + (single2 * single2)) >= ((single3 * single3) + (single4 * single4)))
{
this.PositionMidLabel(obj1, tf9, tf10);
}
else
{
this.PositionMidLabel(obj1, tf10, tf11);
}
}
}
}
}
}
public override void LayoutChildren(Dot.Utility.Media.Diagram.Shapes.DiagramShape childchanged)
{
if (!base.Initializing)
{
Shapes.LineGraph link1 = this.RealLink;
if (link1 != null)
{
int num1 = link1.PointsCount;
if (num1 >= 2)
{
DiagramShape obj1 = this.FromLabel;
if (obj1 != null)
{
PointF tf1 = link1.GetPoint(0);
PointF tf2 = link1.GetPoint(1);
if (num1 == 2)
{
this.PositionEndLabel(obj1, false, tf1, tf1, tf2);
}
else
{
this.PositionEndLabel(obj1, false, tf1, tf2, link1.GetPoint(2));
}
}
this.LayoutMidLabel(childchanged);
obj1 = this.ToLabel;
if (obj1 != null)
{
PointF tf3 = link1.GetPoint(num1 - 1);
PointF tf4 = link1.GetPoint(num1 - 2);
if (num1 == 2)
{
this.PositionEndLabel(obj1, true, tf3, tf3, tf4);
}
else
{
this.PositionEndLabel(obj1, true, tf3, tf4, link1.GetPoint(num1 - 3));
}
}
}
}
}
}
public virtual void StartRelink(Shapes.IDiagramLine oldlink, Shapes.IDiagramPort oldport, PointF dc)
{
if (oldlink != null)
{
Shapes.DiagramShape obj1 = oldlink.DiagramShape;
if ((obj1 != null) && (obj1.Layer != null))
{
base.StartTransaction();
this.myLinkingNew = false;
this.OriginalEndPort = oldport;
this.Link = oldlink;
if (oldlink.ToPort == oldport)
{
this.Forwards = true;
this.OriginalStartPort = oldlink.FromPort;
PointF tf1 = dc;
if (this.OriginalStartPort != null)
{
tf1 = this.OriginalStartPort.DiagramShape.Center;
}
else if (oldlink is Shapes.LineGraph)
{
Shapes.LineGraph link1 = (Shapes.LineGraph)oldlink;
if (link1.PointsCount > 0)
{
tf1 = link1.GetPoint(0);
}
}
else if (oldlink is Shapes.TextLine)
{
Shapes.TextLine link2 = (Shapes.TextLine)oldlink;
if (link2.RealLink.PointsCount > 0)
{
tf1 = link2.RealLink.GetPoint(0);
}
}
this.StartPort = this.CreateTemporaryPort(this.OriginalStartPort, tf1, false, false);
oldlink.FromPort = this.StartPort;
this.EndPort = this.CreateTemporaryPort(this.OriginalEndPort, dc, true, true);
oldlink.ToPort = this.EndPort;
}
else if (oldlink.FromPort == oldport)
{
this.Forwards = false;
this.OriginalStartPort = oldlink.ToPort;
PointF tf2 = dc;
if (this.OriginalStartPort != null)
{
tf2 = this.OriginalStartPort.DiagramShape.Center;
}
else if (oldlink is Shapes.LineGraph)
{
Shapes.LineGraph link3 = (Shapes.LineGraph)oldlink;
if (link3.PointsCount > 0)
{
tf2 = link3.GetPoint(link3.PointsCount - 1);
}
}
else if (oldlink is Shapes.TextLine)
{
Shapes.TextLine link4 = (Shapes.TextLine)oldlink;
if (link4.RealLink.PointsCount > 0)
{
tf2 = link4.RealLink.GetPoint(link4.RealLink.PointsCount - 1);
}
}
this.StartPort = this.CreateTemporaryPort(this.OriginalStartPort, tf2, true, false);
oldlink.ToPort = this.StartPort;
this.EndPort = this.CreateTemporaryPort(this.OriginalEndPort, dc, false, true);
oldlink.FromPort = this.EndPort;
}
base.View.Cursor = Cursors.Hand;
}
}
}