Re: UI hangs while updating

["Andrew E. Makeev" <andrew solvo ru>]

I suppose your application is multithreaded.

RFID reader and GTK main loop should be runned in same thread. Otherwise
you should use Glib::Dispatcher to deliver events (signals) from thread
that read RFID tag to GTK thread (that update graphics).

В Срд, 02/12/2015 в 14:52 -0700, Jason Calhoun пишет:
> Hi,
>
> I'm developing an application using gtkmm-3.0, and running into a bug 
> with the UI I haven't been able to track down.  I've never used GTK or 
> gtkmm before, and haven't done any real development on linux either.
>
> The application uses a Phidgets RFID reader to read an RFID tag, and 
> display some information on a simple UI.  The problem is that the UI 
> seems to freeze at some point while handling events.  Once the UI is 
> hung, I can close the window, at which point I get the error at the 
> console "GLib-CRITICAL **: Source ID XXX was not found when attempting 
> to remove it".  This warning or error occurs only in cases when the UI 
> has hung.  However, even with the UI apparently hung, the application 
> continues to run, it can still read tags and output to the console, for 
> instance.  Also, I've noticed this problem only on the target platform, 
> which is a Raspberry Pi running the Ubuntu MATE distribution available 
> on raspberrypi.org.  I haven't been able to duplicate it on my desktop 
> machine, which is running slightly older versions of the glibmm and 
> gtkmm libraries.
>
> I use the event handlers defined by the Phidgets library to emit sigc 
> signals so I can handle those events in the application's main window.  
> In the signal handlers, there are a few simple calls to update the UI, 
> such as using the set_text method to update the text in a label, and 
> display or clear an image.  I use the built in timeout signal to display 
> a clock, and reset the display after a certain period of time.
>
> I'm not sure if the UI freeze is due to some error in my code, or due to 
> an error in the gtk/glib libraries somewhere.  I would appreciate any 
> help anyone can offer.  I can provide code samples and/or more details 
> as needed.
>
> Can anyone help?
>
>
> Thanks,
> Jason
>
>
>
>
>
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> https://mail.gnome.org/mailman/listinfo/gtkmm-list
-- 
Regards,

Andrew