void Source_LayoutUpdated(object sender, EventArgs e)
{
Rect bounds = SourceElement.GetBounds();
Point p = TargetElement.FindClosestPoint(bounds.GetCenter());
Point[] newPoints = JunctionGeometryHelper.ComputeOptimalConnection(bounds, new Rect(p.X, p.Y, 1, 1), false);
if (newPoints[0] != points[0] || newPoints[1] != points[1])
{
points = newPoints;
InvalidateVisual();
}
}