Hi Victor,

For adding a dedicated internal callback slot, my question would be do
we expect the need for more than one at any time in the future?  If
adding a single slot is enough, then that would certainly make it
easier to implement and wouldn't interfere with the existing
yieldCallback system. Also, if that's the solution, should it be
called csoundInternalYieldCallback?

I can do the change and add this all in but I wouldn't really have a
way to test it that I can think of (though, I think Winsound has a
yield callback going on in it that might be the issue with it freezing
with a FLTK opcode CSD, which might make it testable).

If this looks like the right thing to do, who should do the change?

steven


On 10/26/06, Victor Lazzarini <victor.lazzarini@nuim.ie> wrote:
> I don't think this is the cause of the problem
> with menus; I don't use the yield callback on
> the Csound5 app and had problems with menus disappearing,
> but managed to regain control of them.
>
> However, this might be the reason why MacCsound does not
> work with FLTK.
>
> I would suggest that instead of appending callbacks,
> which might cause problems perhaps, if there is indeed
> an issue, we could set a
> dedicated graphics callback that gets set in FLrun.
>
> Victor
>
> >
> > Hi All,
> >
> > I noticed today that there might be an issue with FLTK and
> > the csoundYieldCallback and if so if that might not be a
> > source of issues for hosts (i.e. MacCsound).  In
> > InOut/widgets.cpp, if compiled without fltk threading, the
> > fl_run opcode has:
> >
> > csound->SetYieldCallback(csound, CsoundYield_FLTK);
> >
> > This also happens in csoundModuleInit in InOut/winFLTK.c.
> > As there's only one yield callback, I imagine if a host
> > sets one, then csound goes to run, the FLTK yield callback
> > is going to take the place of the host one.
> >
> > Could this be the source of the problem where MacCsound
> > loses it's menus?
> >
> > I also seem to have problems running FLTK GUI's with other
> > hosts (csound5gui, winsound) but each with different
> > problems (the first doesn't show the gui, the second has
> > the GUI showing but winsound becomes inactive).
> >
> > If this is it, what would be a solution?  Allowing an
> > array of callbacks and adding or changing the method to
> > appendYieldCallback?
> >
> > steven
> >
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