在python 3.6中覆盖alt-f4关闭tkinter窗口并将其替换为其他内容 [英] override alt-f4 closing tkinter window in python 3.6 and replace it with something else

问题描述

我花了很长时间阅读过去的帖子，但没有找到我需要的内容.

I spent a long time reading through past posts and didn't find quite what I need.

我正在使用 tkinter 制作 kiosk 类型的窗口.我设置为全屏打开.我想覆盖标准的 alt-f4 命令来关闭它.我不希望它完全无法关闭.我想改用自己的键盘快捷键(alt-ctrl-g-3 或类似的东西).

I'm making a kiosk-type window using tkinter. I set it to open fullscreen. I want to override the standard alt-f4 command to close it. I don't want it completely uncloseable though. I'd like to instead make up my own keyboard shortcut (alt-ctrl-g-3 or something like that).

我尝试了一些覆盖 alt-f4 的建议，但无法使它们起作用.在我的 init 函数中，我包含了:

I tried some of the suggestions for overriding alt-f4 and couldn't get them to work. In my init function I included:

self.bind('<Alt-Key-F4>', self.ignorekey())
.
.
.
def self.ignorekey(self)
    pass

推荐答案

就我所知，有一种方法可以挂接 Alt+F4 或按 X 或任何其他方式:

There is a way to hook the Alt+F4 or pressing the X or any other way as far as I know:

root.protocol("WM_DELETE_WINDOW", do_exit)

其中 do_exit() 是回调函数，root 是您的主窗口.

where do_exit() is the callback function and root is your main window.

此绑定不传递事件对象.据我所知，这应该适用于任何平台.

This binding does not pass an event object. As far as I can see this should work for any platform.

这是一个例子:

from tkinter import *

root = Tk()

pressed_f4 = False  # Is Alt-F4 pressed?

def do_exit():
    global pressed_f4
    print('Trying to close application')
    if pressed_f4:  # Deny if Alt-F4 is pressed
        print('Denied!')
        pressed_f4 = False  # Reset variable
    else:
        close()     # Exit application

def alt_f4(event):  # Alt-F4 is pressed
    global pressed_f4
    print('Alt-F4 pressed')
    pressed_f4 = True

def close(*event):  # Exit application
    root.destroy()

root.bind('<Alt-F4>', alt_f4)
root.bind('<Escape>', close)
root.protocol("WM_DELETE_WINDOW",do_exit)

root.mainloop()

我不确定来自 root.bind('<Alt-F4>', alt_f4) 的回调总是会在来自 root.protocol("WM_DELETE_WINDOW",do_exit).你可能需要做更多的研究来确定这一点.

I'm not sure that the callback from root.bind('<Alt-F4>', alt_f4) always will run before the callback from root.protocol("WM_DELETE_WINDOW",do_exit). You may have to do more research to establish that.

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