Thnks to my friend Aristeidis I have in my hands a WebPropertyEditors that contains an AspxTreeList implementation and I can share it with the community.
Since I didn’t write the code I cannot answer to many questions but from a first look I an IWebTreeNode interface that should be implemented by your persistent object along with ITreeNode.
thnk you for sharing this one Aris
ps: AspxTreeList editor is going to be released with Xaf 9.2 version. This one is for those that are in a hurry