Drop hooks

Register a "drop hook" with the new trees object. A drop hook is triggered when a specific mime type is dropped into the Trees view.

def drop_hook(type, data):

   print type, data
   if type is "text/plain":
       node = Node(data)
       activeSession().addNode(node)

trees.registerDropHook("text/plain", drop_hook) trees.registerDropHook("text/uri-list", drop_hook)