from Tkinter import *

# This file shows how to trap the killing of a window

# when the user uses window manager menus (typ. upper left hand corner

# menu in the decoration border).

### ******* this isn't really called -- read the comments

def my_delete_callback():

    print "whoops -- tried to delete me!"

class Test(Frame):

    def deathHandler(self, event):

        print self, "is now getting nuked. performing some save here...."

    def createWidgets(self):

        # a hello button

        self.hi_there = Button(self, text='Hello')

        self.hi_there.pack(side=LEFT)

    def __init__(self, master=None):

        Frame.__init__(self, master)

        Pack.config(self)

        self.createWidgets()

        ###

        ###  PREVENT WM kills from happening

        ###

        # the docs would have you do this:

#       self.master.protocol("WM_DELETE_WINDOW", my_delete_callback)

        # unfortunately, some window managers will not send this request to a window.

        # the "protocol" function seems incapable of trapping these "aggressive" window kills.

        # this line of code catches everything, tho. The window is deleted, but you have a chance

        # of cleaning up first.

        self.bind_all("<Destroy>", self.deathHandler)

test = Test()

test.mainloop()