I am trying to execute a function with the closing event: self.toplevel_1.protocol ('WM_DELETE_WINDOW', lambda: self.close_windows (3)) but it does not execute, I have thought that it has to do with the window manager since it I have removed and I have an independent closing button, I have looked for some other closing event for windows without the window manager but I can't find it, I would like to know if there is any closing event for this case, thank you very much.

def windows_open(self):
    self.Toplevel_3 = Toplevel(self)
    self.toplevel_3 .protocol('WM_DELETE_WINDOW',
                     lambda: self.close_windows(3))

def close_windows(self, number):
    #.....
    if number is 3:
        self.toplevel_3. destroy()
        self._open_3 = False
    #.....

CodePudding user response：

The WM_DELETE_WINDOW protocol and other protocols are specifically related to window manager protocols. If you don't have a window manager, they don't apply.

From the protocol man page:

This command is used to manage window manager protocols...

In the absence of a window manager, you can bind to the <Destroy> event which should fire whether you have a window manager or not. You have to be careful with this if you bind to the root window. Bindings on the root widget or a Toplevel will apply to all descendant widgets, so in the bound function you'll want to run code only if event.widget refers to the root or Toplevel window.