/Demo/tkinter/matt/killing-window-w-wm.py

 1from Tkinter import *
 2
 3# This file shows how to trap the killing of a window
 4# when the user uses window manager menus (typ. upper left hand corner
 5# menu in the decoration border).
 6
 7
 8### ******* this isn't really called -- read the comments
 9def my_delete_callback():
10    print "whoops -- tried to delete me!"
11
12class Test(Frame):
13    def deathHandler(self, event):
14        print self, "is now getting nuked. performing some save here...."
15
16    def createWidgets(self):
17        # a hello button
18        self.hi_there = Button(self, text='Hello')
19        self.hi_there.pack(side=LEFT)
20
21    def __init__(self, master=None):
22        Frame.__init__(self, master)
23        Pack.config(self)
24        self.createWidgets()
25
26        ###
27        ###  PREVENT WM kills from happening
28        ###
29
30        # the docs would have you do this:
31
32#       self.master.protocol("WM_DELETE_WINDOW", my_delete_callback)
33
34        # unfortunately, some window managers will not send this request to a window.
35        # the "protocol" function seems incapable of trapping these "aggressive" window kills.
36        # this line of code catches everything, tho. The window is deleted, but you have a chance
37        # of cleaning up first.
38        self.bind_all("<Destroy>", self.deathHandler)
39
40
41test = Test()
42test.mainloop()