Tkinter: spinbox command and percent substitutions

[Jeff Epler]

You'll have to arrange for the Tk -command to contain %x and %y
substitutions, and similarly for the -validatecommand.

The sequence would look something like this:
	tkcmd = self.register(self.sbcmd)
	self.sb = Tkinter.Spinbox(self, command=(tkcmd, "%x", "%y"))
	...
	def sbcmd(self, x, y):
		print x, y
I don't have 8.4, so I can't test this out exactly.

Jeff