def editorEvent(self, event, model, option, index):
        if event.type() == QtCore.QEvent.MouseButtonRelease and \
                event.button() == QtCore.Qt.LeftButton:
            column = index.model()._editor.columns[index.column()]
            obj = index.data(QtCore.Qt.UserRole)
            checked = bool(column.get_raw_value(obj))
            column.set_value(obj, not checked)
            return True
        else:
            return False
Return list of compute nodes in all child cells.
dataset/ETHPy150Open enthought/traitsui/traitsui/qt4/extra/checkbox_renderer.py/CheckboxRenderer.editorEvent--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/cells/messaging.py/MessageRunner.compute_node_get_all