/// <summary>
/// Draw the edge on the graph that connects 2 nodes passed, if edge param is null, create a new edge
/// </summary>
/// <param name="startNode"></param>
/// <param name="endNode"></param>
/// <param name="edge"></param>
private void DrawEdge(CanvasNode startNode, CanvasNode endNode, CanvasEdge edge = null)
{
Point startPoint, endPoint;
startPoint = new Point(startNode.X, startNode.Y);
endPoint = new Point(endNode.X, endNode.Y);
if (edge == null)
{
edge = new CanvasEdge()
{
Stroke = Brushes.DarkGray,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
StrokeThickness = 3,
X1 = startNode.X,
Y1 = startNode.Y,
X2 = endNode.X,
Y2 = endNode.Y,
IsDirected = ArcType.SelectedItem == DirectedArc
};
// Add attributes to the edge
foreach (KeyValuePair <string, double> attr in graph.CommonAttributes)
{
if (!edge.Impl.HasNumericAttribute(attr.Key))
{
edge.Impl.NumericAttributes.Add(attr.Key, attr.Value);
}
}
graph.Call(graph =>
{
graph.ConnectNodeToWith(startNode.Impl, endNode.Impl, edge.Impl);
});
graph[edge.Impl] = edge;
}
else
{
edge.Stroke = Brushes.DarkGray;
edge.HorizontalAlignment = HorizontalAlignment.Center;
edge.VerticalAlignment = VerticalAlignment.Center;
edge.StrokeThickness = 3;
}
MainCanvas.Children.Add(edge);
Canvas.SetZIndex(edge, -1);
startNode.OutLines.Add(edge);
endNode.InLines.Add(edge);
MainCanvas.UpdateLines(startNode);
MainCanvas.UpdateLines(endNode);
}
