Node.IsFixed at GoLayoutTree

How to use or implement function something like GoLayoutForceDirected.IsFixed at GoLayoutTree?

i want to set position to avoid exist nodes when adding nodes.

There really isn’t an option for that. Adding a single node to a tree might shift the other nodes quite a bit, so locking them down doesn’t really work.

What our new GoXam product does is to layout the tree a second time and then animate the change from tree 1 to tree 2. It’s a very nice solution to the problem.