I have a diagram that represents a company organization chart, somewhat like the composite node demo program. I have a "Format Chart" button to let the user tidy up the layout, using the TreeLayout class.

My problem is that this apparently always places "sister nodes" (nodes with same parent) in the order in which they were created, even if the user has later changed his/her mind and rearranged them horizontally. At least when I use TreeLayoutBalance.Original, which is default - the other options do not seem relevant for my application.

Is there some way to tell TreeLayout to not reorder sister nodes horizontally?

Thanks, Stoyo.

Just in case anyone else encounters this problem, and are still desperately clinging C# 2.0 syntax, here's my version:

         foreach (DiagramNode diagramNode in _diagramView.Diagram.Nodes)
         {
            if (diagramNode.OutgoingLinks.Count >= 2)
            {
               List<DiagramLink> diagramLinks = new List<DiagramLink>(diagramNode.OutgoingLinks);

               diagramLinks.Sort(delegate(DiagramLink link1, DiagramLink link2)
                                 { return link1.EndPoint.X.CompareTo(link2.EndPoint.X); });

               diagramNode.OutgoingLinks.Clear();
               foreach (DiagramLink diagramLink in diagramLinks)
                  diagramNode.OutgoingLinks.Add(diagramLink);
            }
         } 

But I do have a suggestion. I can imagine a situation where you want to format the tree the way I'm requesting, but would prefer to not reorder the nodes. How about adding a new option

TreeLayoutBalance.Current 

(or something else) that does that?

This version adds a Preserve option to TreeLayoutBalance, which should preserve the initial geometric order of nodes in the tree:
https://mindfusion.eu/_beta/fcnet_treebalance.zip

It does not work for radial layouts at this time.

I hope that helps,
Stoyan