Re: GTK+ & GLib threads

[Todd Fisher <taf2 lehigh edu>]

Andrew,
   You should not use any GUI calls in your background thread.  It 
would be better to use something like GAsyncQueue,
in combination with a timeout function, to send notification to the GUI 
thread, that it should update itself in someway.
You might find it very useful to search through the archives of this 
mailing list, as this topic has come up quiet often.

-todd

Andrew Kirillov wrote:

> Hello.
>
> I am writing a multithreaded application. There are two threads:
> 1) default thread for GUI and 2) a background thread, which downloads
> something from network. Sometimes I need to update some widgets
> depending on current state of the background thread. I am using a call
> to gtk_widget_queue_draw() from the background thread. Then the widget
> must receive the expose event and to draw something in the main
> thread. All works fine, but not so long. After some time the widget
> does not receive expose event any more. The background work performs
> as before, but the call to my callback for expose event does not
> occur. More of it - some widgets, menu for example, are not updated
> after it.
>
> What happens ? Any ideas ?
> What is a safe method to invalidate some widgets from a background
> thread ?
>
>  
>
>