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
  22     def __init__(self, master=None):
  23         Frame.__init__(self, master)
  24         Pack.config(self)
  25         self.createWidgets()
  26
  27         ###
  28         ###  PREVENT WM kills from happening
  29         ###
  30
  31         # the docs would have you do this:
  32
  33 #       self.master.protocol("WM_DELETE_WINDOW", my_delete_callback)
  34
  35         # unfortunately, some window managers will not send this request to a window.
  36         # the "protocol" function seems incapable of trapping these "aggressive" window kills.
  37         # this line of code catches everything, tho. The window is deleted, but you have a chance
  38         # of cleaning up first.
  39         self.bind_all("<Destroy>", self.deathHandler)
  40
  41
  42 test = Test()
  43 test.mainloop()