Re: GUI freezes waiting for callback function to return

[jcupitt gmail com]

On 13 December 2012 13:57, Mateusz Marzantowicz
<mmarzantowicz osdf com pl> wrote:
> My application is supposed to do some extensive file operations which
> may take a while depending on number of files. I can chunk the work as
> John suggested but I don't like this approach. I prefer to use threading
> of some kind and I'm little bit disappointed that GTK+ doesn't offer
> that out of the box for menus, actions and callbacks.

The gtk way is actually better (in my opinion). Callbacks running in
their own threads would introduce all sorts of horrible problems with
locking in even the simplest program. Having callbacks run by the GUI
thread means no callback can interrupt another callback, except via
the main loop. Much simpler!

The pygtk faq has some sample code with threading:

http://faq.pygtk.org/index.py?file=faq20.006.htp&req=show

You may be able to adapt that to pygobject.

There was a thread about this back in July that gives some background.
It's C, but it might be useful to you:

https://mail.gnome.org/archives/gtk-app-devel-list/2012-July/msg00021.html

John