Matt's examples

1 files changed, 43 insertions, 0 deletions

diff --git a/Demo/tkinter/matt/killing-window-w-wm.py b/Demo/tkinter/matt/killing-window-w-wm.py
new file mode 100644
index 0000000..6ec3464
--- /dev/null
+++ b/Demo/tkinter/matt/killing-window-w-wm.py
@@ -0,0 +1,43 @@
+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()