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

   1 from 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
   9 def my_delete_callback():
  10     print "whoops -- tried to delete me!"
  11
  12 class 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
  41 test = Test()
  42 test.mainloop()