def resynch_editor(self):
""" Resynchronizes the contents of the editor when the object trait
changes externally to the editor.
"""
button = self._button
if button is not None:
label = self.factory.label
if label == "":
label = user_name_for(self.name)
button.setText(label)
button.setEnabled(isinstance(self.value, HasTraits))
