I modified the stand alone drag-and-drop-folder-tree class to use a callback for creating context menus. Then I started looking into the standalone floating_window implementation which doesn't play nicely with the folder tree without modification. Got that to work but realized I really need to turn it into a class.
Sensing a theme, I'm now looking at the dhtmlsuite implementation. Nice work! (and I thought AreaEdit was huge).
From what I can tell the dhtmlsuite implementation of dragdropTree does not support context menus. Is there some magic I've overlooked to hook context menus to this tree implementation?