Well, I rewrote this part, mainly getting ideas from the subGraphApp sample, and my problems have diseppeared. However, I still have one behaviour I dislike :
When moving a node across the frontier of a suggraph, the subgraph is expanded so that it still contains the node. I would rather have a behaviour where the subgraph remains unchanged (manual resizing of the subgraph is enabled), and the node is a candidate for being promoted to the enclosing graph.
I tried to look into the subGraphApp sample, where such a behaviour can mostly be acheived by holding the shift key, and from what I understand, this behaviour is acheived by setting DragsRealtime to false, which I do not want.
Is there any other way to acheive this behaviour ?