/// <summary>
/// Adjusts the edge end points so they don't end outside the shape of the node they are attached to.
/// </summary>
private static void AdjustPortLocation(LayoutGraph graph, Edge e, YPointPath path, bool atSource)
{
Node node = atSource ? e.Source : e.Target;
YPoint pointRel = atSource ? graph.GetSourcePointRel(e) : graph.GetTargetPointRel(e);
// get offset from the node center to the end of the shape at the node side the edge connects to
LineSegment segment = path.GetLineSegment(atSource ? 0 : path.Length() - 2);
double offset = Math.Min(graph.GetWidth(node), graph.GetHeight(node)) / 2;
double offsetX = segment.DeltaX > 0 ^ atSource ? -offset : offset;
double offsetY = segment.DeltaY > 0 ^ atSource ? -offset : offset;
// if the edge end point is at the center of this side, we use the calculated offset to put the end point on
// the node bounds, otherwise we prolong the last segment to the center line of the node so it doesn't end
// outside the node's shape
YPoint newPortLocation = segment.IsHorizontal
? new YPoint(pointRel.Y != 0 ? 0 : offsetX, pointRel.Y)
: new YPoint(pointRel.X, pointRel.X != 0 ? 0 : offsetY);
if (atSource)
{
graph.SetSourcePointRel(e, newPortLocation);
}
else
{
graph.SetTargetPointRel(e, newPortLocation);
}
}
/// <inheritdoc/>
public void ApplyLayout(LayoutGraph graph)
{
var affectedNodesDP = graph.GetDataProvider(AffectedNodesDpKey);
for (IEdgeCursor ec = graph.GetEdgeCursor(); ec.Ok; ec.Next())
{
Edge e = ec.Edge;
YPointPath path = graph.GetPath(e);
//adjust source point
if (affectedNodesDP == null || affectedNodesDP.GetBool(e.Source))
{
AdjustPortLocation(graph, e, path, true);
}
if (affectedNodesDP == null || affectedNodesDP.GetBool(e.Target))
{
AdjustPortLocation(graph, e, path, false);
}
}
}
public override void ApplyLayout(LayoutGraph graph)
{
ApplyLayoutCore(graph);
foreach (Node n in graph.Nodes)
{
foreach (Edge e in n.OutEdges)
{
bool lastSegmentOverlap = false;
IEdgeLayout er = graph.GetLayout(e);
if (er.PointCount() > 0)
{
// last bend point
YPoint bendPoint = er.GetPoint(er.PointCount() - 1);
IEnumerator <Edge> ecc = n.OutEdges.GetEnumerator();
loop : while (ecc.MoveNext())
{
Edge eccEdge = ecc.Current;
if (eccEdge != e)
{
YPointPath path = graph.GetPath(eccEdge);
for (ILineSegmentCursor lc = path.LineSegments(); lc.Ok; lc.Next())
{
LineSegment seg = lc.LineSegment;
if (seg.Contains(bendPoint))
{
lastSegmentOverlap = true;
goto loop;
}
}
}
}
}
YList points = graph.GetPointList(e);
for (ListCell c = points.FirstCell; c != null; c = c.Succ())
{
YPoint p = (YPoint)c.Info;
if (c.Succ() == null && !lastSegmentOverlap)
{
break;
}
YPoint p0 = (YPoint)(c.Pred() == null ? graph.GetSourcePointAbs(e) : c.Pred().Info);
YPoint p2;
if (Math.Abs(p0.X - p.X) < 0.01)
{
p2 = new YPoint(p.X, p.Y - 0.001);
}
else
{
p2 = new YPoint(p.X - 0.001, p.Y);
}
points.InsertBefore(p2, c);
}
graph.SetPoints(e, points);
}
}
}
