在Qt/PyQt中将自定义QEvent传播到父窗口小部件

class MyEvent(QEvent):
    def __init__(self, data):
        super().__init__(QEvent.User)
        self.data = data

class MyWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)

    def event(self, event):
        if event.type() == QEvent.User:
            # 处理自定义事件
            self.parent().event(event)
            return True
        return super().event(event)

class ParentWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)

    def event(self, event):
        if event.type() == QEvent.User:
            # 处理自定义事件
            my_event = event
            data = my_event.data
            # 进行相应的处理
            return True
        return super().event(event)