def createWidget(self, className, parent=None, name=""):
if parent is None and self.base_instance:
# No parent, this is the top-level widget
return self.base_instance
if className in QUiLoader.availableWidgets(self):
widget = super().createWidget(className, parent, name)
else:
if className in self.custom_widgets:
widget = self.custom_widgets[className].create(parent)
else:
raise KeyError("Unknown widget '%s'" % className)
if self.base_instance:
# Set an attribute for the new child widget on the base instance
setattr(self.base_instance, name, widget)
return widget
