def populate(self,node=None,body=None):
if hasattr(body,'orbiting_bodies'):
if node: node.no_selection=True
for o in body.orbiting_bodies:
l = TreeViewLabel(text=o.name)
l.site = None
n = self.add_node(l,node)
self.populate(n,o)
if hasattr(body,'sites'):
if node: node.no_selection=True
for o in body.sites:
l = TreeViewLabel(text=o.name)
l.site = o
n = self.add_node(l,node)
self.populate(n,o)
