private AbstractEdge isAlreadyOppositeEdge(AbstractEdge item)
{
AbstractEdge ret = null;
foreach (AbstractEdge edge in this.edges)
{
if (edge.Start.Equals(item.End))
{
if (edge.End.Equals(item.Start))
{
ret = edge;
break;
}
}
}
return ret;
}
/// <summary>
/// Add edge. If edge is already exists, only increment weight. If opposite edge is exists, curve middle point offset is setted.
/// </summary>
protected void addEdge(AbstractEdge item)
{
if (!this.edges.Contains(item))
{
AbstractEdge edge = this.isAlreadyEdge(item);
if (edge == null)
{
AbstractEdge oppositeEdge = this.isAlreadyOppositeEdge(item);
if (oppositeEdge == null)
{
this.edges.Add(item);
}
else
{
item.CurveMiddlePointOffset = new PointF(50, 50);
this.edges.Add(item);
}
}
else
{
edge.incrementWeight();
}
}
}
protected void deleteEdge(AbstractEdge item)
{
if (this.edges.Contains(item))
{
this.removeNoteAttachmentBeforeDelete(item);
this.unselectItem(item);
this.edges.Remove(item);
this.deleteAllStates();
}
}
public void changeEdgeDirection(AbstractEdge item, bool selected)
{
if (this.edges.Contains(item))
{
AbstractEdge edge = null;
if (item is EdgePositionTransition)
{
Transition endTransition = (Transition)item.End;
if (!TransitionType.SINK.Equals(endTransition.TransitionType))
{
edge = new EdgeTransitionPosition(item.Name, item.Unid, item.ShowAnnotation, item.Weight, endTransition, (Position)item.Start, item.CurveMiddlePointOffset, EdgeType.NORMAL);
}
}
else if (item is EdgeTransitionPosition)
{
Transition startTransition = (Transition)item.Start;
if (!TransitionType.SOURCE.Equals(startTransition.TransitionType))
{
edge = new EdgePositionTransition(item.Name, item.Unid, item.ShowAnnotation, item.Weight, (Position)item.End, startTransition, item.CurveMiddlePointOffset, item.EdgeType);
}
}
if (edge != null)
{
this.deleteEdge(item);
this.addEdge(edge);
if (selected)
{
this.selectItem(edge);
}
}
}
}