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Viewing changes to Demo/tkinter/matt/killing-window-w-wm.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-03-23 00:01:27 UTC
  • Revision ID: james.westby@ubuntu.com-20090323000127-5fstfxju4ufrhthq
Tags: upstream-3.1~a1+20090322
Import upstream version 3.1~a1+20090322

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Demo/tkinter/matt/killing-window-w-wm.py
 
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from tkinter import *
 
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# This file shows how to trap the killing of a window
 
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# when the user uses window manager menus (typ. upper left hand corner
 
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# menu in the decoration border).
 
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### ******* this isn't really called -- read the comments
 
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def my_delete_callback():
 
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    print("whoops -- tried to delete me!")
 
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class Test(Frame):
 
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    def deathHandler(self, event):
 
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        print(self, "is now getting nuked. performing some save here....")
 
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    def createWidgets(self):
 
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        # a hello button
 
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        self.hi_there = Button(self, text='Hello')
 
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        self.hi_there.pack(side=LEFT)
 
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    def __init__(self, master=None):
 
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        Frame.__init__(self, master)
 
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        Pack.config(self)
 
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        self.createWidgets()
 
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        ###
 
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        ###  PREVENT WM kills from happening
 
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        ###
 
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        # the docs would have you do this:
 
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#       self.master.protocol("WM_DELETE_WINDOW", my_delete_callback)
 
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        # unfortunately, some window managers will not send this request to a window.
 
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        # the "protocol" function seems incapable of trapping these "aggressive" window kills.
 
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        # this line of code catches everything, tho. The window is deleted, but you have a chance
 
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        # of cleaning up first.
 
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        self.bind_all("<Destroy>", self.deathHandler)
 
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test = Test()
 
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test.mainloop()