截取Tkinter“退出”命令？ [英] Intercept Tkinter "Exit" command?

问题描述

我在Python中使用Tkinter编写了一个客户端 - 服务器程序。我需要服务器来跟踪连接的客户端。为此，我希望客户端在点击退出按钮（角落中的标准X）后向服务器发送自动消息。

I'm writing a client-server program in Python with Tkinter. I need the server to keep track of the connected clients. For this, I would like to have the client send an automated message to the server after the exit button(the standard "X" in the corner) is clicked. How can I know when the user is exiting the program?

推荐答案

您想要使用 wm_protocol 方法的toplevel窗口。具体来说，您对 WM_DELETE_WINDOW 协议感兴趣。

You want to use the wm_protocol method of the toplevel window. Specifically, you are interested in the WM_DELETE_WINDOW protocol. If you use that method, it allows you to register a callback which is called when the window is being destroyed.

用法：

root.protocol("WM_DELETE_WINDOW", app.on_delete)

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