public Edge(Graph graph)
{
this.Graph = graph;
EdgeParts = new ObservableCollection <EdgePart>();
EdgeBreaks = new ObservableCollection <EdgeBreak>();
IsSelected = false;
HeadSymbolCanvas = null;
TailSymbolCanvas = null;
HeadSymbol = Graph.DefaultHeadSymbol;
TailSymbol = Graph.DefaultTailSymbol;
edgeBrushType = Graph.DefaultEdgeBrushType;
}
public void UpdateStructure()
{
int lastIndex = EdgeParts.Count - 1;
if (HeadSymbolCanvas == null)
{
HeadSymbolCanvas = new Canvas();
Graph.UICanvas.Children.Add(HeadSymbolCanvas);
Canvas.SetZIndex(HeadSymbolCanvas, Statics.EndSymbolZIndex);
}
else
{
HeadSymbolCanvas.Children.Clear();
}
if (TailSymbolCanvas == null)
{
TailSymbolCanvas = new Canvas();
Graph.UICanvas.Children.Add(TailSymbolCanvas);
Canvas.SetZIndex(TailSymbolCanvas, Statics.EndSymbolZIndex);
}
else
{
TailSymbolCanvas.Children.Clear();
}
if (HeadSymbol != EndSymbol.None)
{
Line line = EdgeParts[0].UILine;
Point startPoint = new Point(line.X1, line.Y1);
Point linePoint = new Point(line.X2, line.Y2);
DrawEndSymbol(HeadSymbolCanvas, HeadSymbol, startPoint, linePoint);
}
if (TailSymbol != EndSymbol.None)
{
Line line = EdgeParts[lastIndex].UILine;
Point startPoint = new Point(line.X2, line.Y2);
Point linePoint = new Point(line.X1, line.Y1);
DrawEndSymbol(TailSymbolCanvas, TailSymbol, startPoint, linePoint);
}
EdgeBrushType = edgeBrushType;
}
