Hi,

We are glad to know that you like Flowchart.NET!

You could use the following methods to save and restore the path of arrows:

class ArrowPath
{
  public Node origin;
  public Node dest;
  public int orgRow;
  public int destRow;
  public ArrowStyle style;
  public short segmentCount;
  public PointCollection points;
}

ArrowPath saveArrowPath(Arrow a)
{
  ArrowPath ap = new ArrowPath();
  ap.origin = a.Origin;
  ap.dest = a.Destination;
  ap.orgRow = a.OrgnIndex;
  ap.destRow = a.DestIndex;
  ap.style = a.Style;
  ap.segmentCount = a.SegmentCount;
  ap.points = a.ControlPoints.Clone();
  return ap;
}

void restoreArrowPath(ArrowPath ap, Arrow a)
{
  a.Origin = ap.origin;
  a.Destination = ap.dest;
  a.OrgnIndex = ap.orgRow;
  a.DestIndex = ap.destRow;
  a.Style = ap.style;
  a.SegmentCount = ap.segmentCount;
  for (int i = 0; i < a.ControlPoints.Count; ++i)
    a.ControlPoints[i] = ap.points[i];
}
 

The number of control points depends both on the arrow Style and SegmentCount, so you must set these properties before assigning the points values. E.g. a Bezier arrow with 2 segments has 7 control points, while a Polyline with 2 segments has 3 control points. If there are less points in the collection than indicated in arrows Style and SegmentCount, there will be an "index out of range: exception thrown at some point.

If you use anchor points, you might also save and restore the OrgnAcnhor and DestAnchor properties.

I hope that helps,
Stoyan