如何在 PyQt5 中捕捉悬停和鼠标离开信号 [英] How to Catch Hover and Mouse Leave Signal In PyQt5

问题描述

QPushButton 有一个名为 clicked() 的信号，我们可以通过它捕捉点击事件.有没有捕获悬停和离开事件的方法或信号?

QPushButton has a signal which is named clicked(), and we can catch click events through it. Is there a method or signal which catches hover and leave events?

如何捕捉鼠标悬停按钮和鼠标离开按钮，如下所示:

How can I catch mouse-over button and mouse-leave button, like this:

button = QPushButton(window)
button.clicked.connect(afunction)

注意:我使用的是python3.

Note: I use python3.

推荐答案

您需要继承 QPushButton 类并重新实现 enterEvent 和 leaveEvent>:

You need to subclass the QPushButton class and reimplement the enterEvent and leaveEvent:

class Button(QPushButton):

    def __init__(self, parent=None):
        super(Button, self).__init__(parent)
        # other initializations...

    def enterEvent(self, QEvent):
        # here the code for mouse hover
        pass

    def leaveEvent(self, QEvent):
        # here the code for mouse leave
        pass

然后您可以在本地处理该事件，或发出信号(如果其他小部件需要对此事件做出反应，您可以使用信号将该事件通知其他小部件).

You can then handle the event locally, or emit a signal (if other widgets needs to react on this event you could use a signal to notify the event to other widgets).

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