/// <summary>
/// Overridden to pad the number of bends so that there are always 2 mod 3 by duplicating the last location, if necessary.
/// </summary>
protected override IEdge CreateEdge(IGraph graph, IPortCandidate sourcePortCandidate,
IPortCandidate targetPortCandidate)
{
if (CreateSmoothSplines && DummyEdge.Style is yWorks.Graph.Styles.BezierEdgeStyle)
{
if (DummyEdge.Bends.Any())
{
augmenting = true;
try {
var lastLocation = DummyEdge.Bends.Last().Location.ToPointD();
if (DummyEdge.Bends.Count % 3 == 1)
{
//We can reach this branch if we finish the edge creation
//without having finished a control point triple
//Just duplicate the last bend
DummyEdgeGraph.AddBend(DummyEdge, lastLocation);
}
else if (DummyEdge.Bends.Count % 3 == 0)
{
//Actually, we shouldn't be able to come here
//since we always create bend triples and have an initial single control point
DummyEdgeGraph.AddBend(DummyEdge, lastLocation);
DummyEdgeGraph.AddBend(DummyEdge, lastLocation);
}
} finally {
augmenting = false;
}
}
}
return(base.CreateEdge(graph, sourcePortCandidate, targetPortCandidate));
}
private void DummyGraph_BendRemoved(object sender, BendEventArgs e)
{
if (!augmenting)
{
if (CreateSmoothSplines && DummyEdge.Style is yWorks.Graph.Styles.BezierEdgeStyle)
{
augmenting = true;
try {
if (DummyEdge.Bends.Any() && DummyEdge.Bends.Count % 3 == 0)
{
//Undo bend creation that finished a triple
DummyEdgeGraph.Remove(DummyEdge.Bends.Last());
}
} finally { augmenting = false; }
}
}
}
private void DummyGraph_BendAdded(object sender, ItemEventArgs <IBend> e)
{
if (!augmenting)
{
if (CreateSmoothSplines && DummyEdge.Style is yWorks.Graph.Styles.BezierEdgeStyle)
{
augmenting = true;
try {
if (DummyEdge.Bends.Count % 3 == 0)
{
//Bend creation that finishes a control point line
//Insert a middle bend
var cp0 = DummyEdge.Bends[DummyEdge.Bends.Count - 2].Location.ToPointD();
var cp2 = e.Item.Location.ToPointD();
var cp1 = 0.5 * (cp2 - cp0) + cp0;
DummyEdgeGraph.AddBend(DummyEdge, cp1, DummyEdge.Bends.Count - 1);
}
} finally { augmenting = false; }
}
}
}
