pickling problems with Pmw/Tkinter
Eric Brunel
eric.brunel at pragmadev.com
Mon Jul 29 04:03:35 EDT 2002
Don Arnold wrote:
> I'm trying to develop a Tkinter app that pickles the values of a couple of
> Pmw counters. Then on its next run, it unpickles these values and loads
> them back into the counters. That's the plan, anyway. Here's what I have:
>
[snip code]
> self.bind('<Destroy>',self.shutdown)
First: why do you make your app class inherit from Frame? I've seen many
people doing that and I can't understand why. There are many things you can
do on an actual window (in Tkinter words a Toplevel) that you just can't do
on frames: "regular" menubars, specific events for windows, and so on...
So I would make app inherit from Tk or Toplevel and do the following:
self.protocol('WM_DELETE_WINDOW', self.shutdown)
This may solve the problem. In fact, with the binding on <Destroy>, I
suspect the contained widgets to be destroyed *before* the binding is
called. So the Pmw counters in your _minwordlen and _maxwordlen attributes
may already have been destroyed. However, why no exception is raised is a
mystery...
If you do it that way, put also a self.quit() in your shutdown method or
the window won't close.
HTH
--
- Eric Brunel <eric.brunel at pragmadev.com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com
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