[Qt-interest] QApplication on a pthread in Symbian

[Felipe Gil-Castiñeira]

Felipe Gil-Castiñeira <xil <at> uvigo.es> writes:

> 
> Hi,
> 
> I have a GLib-OpenC-Symbian application which was originally designed to
> be a "daemon" without GUI. Now I have decided to add an optional user
> interface in Qt 4.7 and QML (the user can select to display it or not in
> the config file), so I will have both GLib's and Qt's main loops.
> 
> I am a Qt newbie, but It seemed a good idea to instantiate a
> QApplication in a new pthread. I have found a couple of messages from
> people succeeding with this approach, but I am getting a data abort
> exception so I am not sure if:
> 
>     * this is a bug in Qt for Symbian and I should file a bug report
>       (unfortunately, I am using Qt Creator 1.3.83 and I can't do step
>       debugging because of the bug QTCREATORBUG-1563).
>     * this is not really a good idea and I should find another solution.
>       In that case any suggestion will be appreciated. 
> 
> Thanks!
>     Felipe.
> 


Just in case someone has the same problem and finds this thread: finally it
worked following the opposite approach, instantiate a QApplication in the main
thread and execute my old GLib daemon code in a new pthread. 

This works fine in Symbian, but in Maemo the invocation of g_main_loop_run in
the pthread also affects Qt's main loop in the main thread. In that case, the
solution is simpler: it is enough to remove the "g_main_loop_run" in the
secondary thread, and everything works with Qt's main loop (after invoking
QApplication::exec). I tried also this in Symbian, but it didn't work.

In conclusion: now I have the application working, but I need different
solutions for Symbian and Maemo. 

Best,
    Felipe.