[pygtk] Callbacks

[Walter Leibbrandt]

Hi,

Peyman wrote:
> Hello
>
> Is there a clean way to temporarily cancel callbacks? For example  
> consider a combobox CB1 with the following callback function
>
> on_CB1_changed(...):
> 	someVar= the new entry
>
> now if I manually change the combobox to, for example "Select item", I  
> don't want the changed signal to be generated since I don't want  
> someVar to be set to "Select item".
>   
To temporarily block specific signal handlers from running, you can use 
the GObject.handler_block() and GObject.handler_unblock() methods 
(http://www.pygtk.org/docs/pygobject/class-gobject.html#method-gobject--handler-block), 
because all widgets (and most of the classes in the gtk module) 
sub-class gobject. The "handler_id" mentioned there is the integer value 
returned by the original connect() call.

HTH

-- 
Walter Leibbrandt                  http://translate.org.za/blogs/walter
Software Developer                                  +27 12 460 1095 (w)
Translate.org.za

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