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 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.