Re: how to i get the arrow-buttons moving?

[Gary Kline <kline thought org>]

=====
Organization: Thought Unlimited.  Public service Unix since 1986.
Of_Interest: With 28 years  of service  to the  Unix  community.

On Thu, Sep 04, 2014 at 12:32:06AM +0200, Gergely Polonkai wrote:
> Hello Gary,
>
> do I get it right, you want to manupulate/query the labels upon
> keypresses? Like when the user presses the Up arrow, fetch the text of
> the first label and print it somewhere?

        *YES*.  in another directory, three or four C files grab hold
        of [[ Say ]] /tmp/files/text.3.txt {or} /tmp/files/text.NN.txt.
        these TXT files contain what the speech-ompaired person has 
        typed.  they are voiced by espeak and other speech binaries.

        when I hit the up- or doen-arrow button I want SOmething to
        appear on the "window" that has the arrow icons.  when the
        user hits Enter or mouse-clicks, that Something voices what
        the users himself cannot.  


> In that case, I’d like to know
> if you have a GtkApplication with GtkApplicationWindows, or “just” a
> simple GtkWindow?


        in my arrow.c, in main(), I have a

        GtkWidget *window;  

        and after gtk_init() is:


        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        .
        .
        .
        so it is just a simple window.




> For the former, I would go for actions and accels (see
> gtk_application_set_accels_for_action() and friends), while the former
> may require catching the ::key-press-event signal.
>
> Best,
> Gergely


        I'll google around and see what functions do what!  iv'e seen
        the `accels' scroll past while searching for other parts of
        code.  I had 0.0 idea what it was. :)

        thanks much,

        gary



> On 4 September 2014 00:24, Gary Kline <kline thought org> wrote:
> > =====
> > Organization: Thought Unlimited.  Public service Unix since 1986.
> > Of_Interest: With 28 years  of service  to the  Unix  community.
> >
> > On Wed, Sep 03, 2014 at 10:44:55PM +0200, Marcus Karlsson wrote:
> > > On Wed, Sep 03, 2014 at 01:13:06PM -0700, Gary Kline wrote:
> > > >     thanks for your input, marcus, but could you give me a few lines of
> > > >     code?  I tried using the gtk_label_set_text() for over an hour
> > > >     last night until it felt like my shoulder was going to drop off and
> > > >     fall on the floor!
> > >
> > > You should be able to set the text with something like:
> > >
> > > gtk_label_set_text (GTK_LABEL (label), "some text");
> > >
> > > But this requires that you have a valid pointer to your label, eiter in
> > > a global variable or passed to the signal handler as the user_data
> > > pointer.
> > >
> > > >     other than usinng "g_signal_connect()" to bail out with a Quit,
> > > >     the only times I see anything to do with a signal are after going
> > > >     GTK_ARROW_UP or _DOWN....  I may have misplaced the
> > > >     gtk_label_get_text() stuff.
> > > >
> > > >     iv'e got:
> > > >
> > > >     gtk_label_get_text(GTK_LABEL(user_data), buf );
> > > >
> > > >     which now looks aways off...  need more clues.
> > >
> > > Gtk_label_get_text () returns the string in the return value, so you
> > > need to to something like:
> > >
> > > str = gtk_label_get_text (GTK_LABEL (user_data));
> > >
> > > This of course also requires that the user_data pointer is pointing at a
> > > label. In your code sample you passed 0 and 1 as the pointers, which
> > > most likely will not be valid pointers to your labels.
> > >
> > > It's often a good idea to group the elements that you need to access
> > > into an object and pass it as the user_data pointer. A struct would be
> > > sufficient. This could also include a field which says which label is
> > > currently selected, for example using and int in the range of 1 to 3.
> > >
> > > If you want to reuse the signal handler and still distinguish which
> > > button caused the signal then you can use the currently unused first
> > > argument which should point to the sender of the signal, or the button
> > > which was pressed down.
> > >
> > >               Marcus
> >
> >         well, here's the dope: after my 27th cup of french roast, it's all
> >         coming together. *Or*, with a few more hacks, most things will fit.
> >
> >         still, no one has been able to answer my main question: how, using
> >         the arrow keys, do I attach onto the individual labels?  I print
> >         3 labels to demonstrate what will appear of the window.  there
> >         probably will be dozens of strings that will become labels.  I
> >         need the up/down arrow keys to select One label.  Another part of
> >         the program will speak that string.
> >
> >         your code examples  were helpful.  my main snafu was in mixing up
> >         the "GTK_MACROS".  The main step is getting the arrow keys to
> >         incicatte--probably with a horizontal line--the right label.
> >
> >         gary
> >
> >
> > --
> >  Gary Kline  kline thought org  http://www.thought.org  Public Service Unix
> >              Twenty-eight years of service to the Unix community.
> >
> >
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list gnome org
> > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list

-- 
 Gary Kline  kline thought org  http://www.thought.org  Public Service Unix
             Twenty-eight years of service to the Unix community.