@on_trait_change('window:opened')
    def _on_window_opened(self, obj, trait_name, old, new):
        if trait_name == 'opened':
            self.start()
Assistance for the QT windowing toolkit.
dataset/ETHPy150Open enthought/mayavi/mayavi/plugins/envisage_engine.py/EnvisageEngine._on_window_opened--crossover with--dataset/ETHPy150Open andrew-gardner/dependsworkflow/depends/depends_graphics_widgets.py/DrawGroupBox.type