Re: GUI problem.

["Michael Lamothe" <michael lamothe gmail com>]

Hi Alberto,

Sorry, I'm not sure that I follow you.  I think that you are saying
that you want to write the C file by yourself.  I was simply hoping to
give you some pointers/recommendations.  If you still don't want to
offer-up the source then maybe you can explain what your application
does, where it calls a thread(s), what you are doing in that thread,
and what things are going on in the main thread.  Make sure that you
mention where you are calling gtk_threads_*() and how you have called
g_main_loop_run()/gtk_main().

I have written a few multi-threaded applications that call
multi-threaded UI libraries.  I'm the upstream for Me TV
(https://launchpad.net/me-tv) and I have been bitten hard by
multi-threaded bugs.

This might not be a multi-threaded issue, it's just a hunch.

Thanks,

Michael


On 20/11/2007, alberto barbaro <khlero83 gmail com> wrote:
> Thanks for all but i will the .c by myself.
> I can't update the GUI from the main because i use the thread. If I comment
> the istruction where I launch the thread the problem will not disappeare and
> i don't know why.
>
> You can write a small .c where in a thread the program change a part of the
> GUI or you can tell to me what use insted the thread.
> Maybe will be better.
>
> Thanks
>
> 2007/11/20, Michael Lamothe < michael lamothe gmail com>:
> > Hi Alberto,
> >
> > Sorry, I've accidentally not replied to all.  But to punish myself for
> > doing this again I'll answer your question myself.
> >
> > In general, what happens when you write a multi-threaded application
> > (that is not multi-thread safe) you'll see unpredictable results.
> > Sometimes you will see a bug, but change a line of unrelated code and
> > the bug will disappear.  Usually the bug will just manifest itself in
> > other ways.  This is what I think is happening to you.  UI lock-ups
> > are a classic sign of a non-multithread safe application.
> >
> > I can debug your application but I am going to make a recommendation to
> you,
> >     Do not update the UI from any other thread other than the main thread!
> >
> > Take my advice, or leave it, either way I will help you but it's
> > easier to change your application now, in its infancy, rather than
> > later.
> >
> > Typically, multi-threaded applications are really hard to debug
> > because the offending code is related to the way the whole application
> > is written.  Do you have a SVN repository or a tarball that you can
> > send me?
> >
> > Thanks,
> >
> > Michael
> >
> >
> > On 20/11/2007, alberto barbaro < khlero83 gmail com> wrote:
> > > Now until the various functions works the GUI don't responde and stay in
> a
> > > gray state.
> > > How can I resolv it?
> > > Thanks
> > >
> > >
> > > 2007/11/20, alberto barbaro < khlero83 gmail com>:
> > > > Well now it works.
> > > > Thanks to all.
> > > >
> > > >
> > > > 2007/11/20, alberto barbaro < khlero83 gmail com>:
> > > >
> > > > > yes.
> > > > > gdk_threads_enter()
> > > > > function();
> > > > > gdk_threads_leave()
> > > > >
> > > > > Have you a complete example? Only a small piace of code where there
> is
> > > an GUI's update.
> > > > > Thanks
> > > > >
> > > > >
> > > > > 2007/11/20, Michael Lamothe < michael lamothe gmail com>:
> > > > >
> > > > > > Are you locking with gdk_threads_enter/leave()?
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Michael
> > > > > >
> > > > > > On 20/11/2007, alberto barbaro <khlero83 gmail com> wrote:
> > > > > > > Hi. I'm trying to develop a small application.
> > > > > > >
> > > > > > > Problem:
> > > > > > >
> > > > > > > I have a table with some buttons. I pass the pointer to the
> table in
> > > a
> > > > > > > thread, in that thread i would update the table with a some new
> > > buttons. The
> > > > > > > buttons will appeare but are not 'clickable'! Why? if I try
> return
> > > thay
> > > > > > > works but with the mouse no. Someone can help me?
> > > > > > >
> > > > > > > Thanks
> > > > > > > _______________________________________________
> > > > > > > gtk-app-devel-list mailing list
> > > > > > > gtk-app-devel-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> > > > > > >