def __dict_changed(self, old, new):
old_keys = set(old)
new_keys = set(new)
added = sub_dict(new, new_keys - old_keys)
removed = sub_dict(old, old_keys - new_keys)
changed = sub_dict(old, new_keys & old_keys)
self._post_event(
TraitDictEvent(added=added, changed=changed, removed=removed)
)
def _context_data_changed ( self, old, new ):
""" Fires when 'context_data' is changed.
"""
if old is None:
old = {}
else:
old.on_trait_event( self._dict_is_modified, 'dict_modified',
remove = True )
new.on_trait_event( self._dict_is_modified, 'dict_modified' )
old_keys = set( old )
new_keys = set( new )
added = sub_dict( new, new_keys - old_keys )
removed = sub_dict( old, old_keys - new_keys )
changed = sub_dict( old, new_keys & old_keys )
self._dict_is_modified(
TraitDictEvent( added=added, changed=changed, removed=removed )
)