Re: Managing keyboard variants

[Sever P A <gnu sever gmail com>]

2009/9/25 Murray Cumming <murrayc murrayc com>:
> On Fri, 2009-09-25 at 10:30 +0000, Sever P A wrote:
>> 2009/9/25 Sever P A <gnu sever gmail com>:
>> > 2009/9/20 Murray Cumming <murrayc murrayc com>:
>> >> On Sat, 2009-09-19 at 10:04 +0200, Sever P A wrote:
>> >>> * Are the same the value of xkl_engine_get_instance (Display *
>> >>> display) [of LibXklavier] than the value pointed of
>> >>> Gtk::Main::instance() ...?
>> >>
>> >> No, they are entirely unrelated.
>> >>
>> >> Googling suggests that you can use GDK_DISPLAY() to get the Display*.
>> >> Thats an X Windows thing.
>> >> http://developer.gimp.org/api/2.0/gdk/gdk-X-Window-System-Interaction.html#GDK-DISPLAY:CAPS
>> >
>> > Thanks to Murray Cumming's answer, and after a few reading of the API
>> > reference, I done,
>> >
>> >        Gdk::Display dpy;
>> >        XklEngine * engine;
>> >        engine = xkl_engine_get_instance(dpy.get_default());
>> >
>> > But the compiler tells me,
>> >
>> > error: cannot convert ‘Glib::RefPtr<Gdk::Display>’ to ‘Display*’ for
>> > argument ‘1’ to ‘XklEngine* xkl_engine_get_instance(Display*)’
>> >
>> > What's wrong ?... Are the pointer "*" and "Glib::RefPtr" not the same
>> > ?... Could be solved anyway ?...
>
> No, of course they are not. You are missing some basic C and C++
> knowledge.
>
> gobj() can help in this kind of situation - see the Basics chapter of
> the gtkmm book.
>
> But you should just use  GDK_DISPLAY, as I suggested.
>
>> Ups ! sorry, I just see that it's not also possible to do
>>
>>     Gdk::Display dpy;
>>
>> What do you suggest ?
>
> I doubt that you'll be able to use the xkl API without learning more
> about C and C++.
>

I'm always firmly decided to learn more and more C++/GTKmm programming
although as I already said elsewhere, I'm not a computer technician.

That would be very instructive for me is to find the guidelines that
explains how integrate LibXklavier in a GTKmm programmes or simple
code examples that covers all of this.

I know that it's possible to work with these two libraries together
independently but I'm trying to avoit XOpenDisplay()/XCloseDisplay()
while I suspect that Gtk::Main objects do the same. So, another way to
ask the same is what would I do (especifically, which concrete and
valid steps) to get a correct XklEngine * engine value ?.

I would appreciate very much your help...

S.