Re: a couple of newbie questions regarding developing apps in GTK+

[Warrior <ymg azstarnet com>]

On Saturday 16 June 2001 07:55 pm Ivica Bukvic shared with us the following 
piece of wisdom:
> 1) When creating a front-end in Glade, the sources of the code get dumped
> in such a way that interface.c file contains function(s) that pertain to
> building the actual widgets and windows. The problem I am having with this
> is that when I try to reference any of the widgets, their pointer address
> is always null (due to fact that all of their references vanish when the
> execution of the above mentioned function is done and returns just a
> pointer to itself, but I am unable to discern from either the book or
> online examples what is the hierarchy between let's say the default window
> and different widgets that belong to that window). I tried making pointers
> to widgets static and even static const, but those did not help either and
> I still kept getting "null" pointer errors when trying to reference any of
> the widgets.

Any widget that's around (has been created and has not been destroyed yet) 
can be refernced as long as the pointer to that widget is within scope. I 
might be able to give more specifc advice if you post some example of what 
you're trying to do.

> Then, I saw that the above mentioned book implements
> widget/window creation in the main() function and thus circumvents some of
> these issues since main function is familiar of its elements at all times.

I usually create main window and everything inside it in main(), stuff that 
belongs to other windows (if any) goes into other files, but that's just me :)

> My question is how can I utilize Glade's implementation and still have
> access to all widgets by other functions? (obviously interfaces.h is
> included in other sources so that is not the issue) How come that static
> implementation does not yield results? What reprecussions does
> implementation of widget construction in the main() function create

None whatsoever.

> since
> (as I currently understand it) main() function constantly cycles itself?

It doesn't unless you write something like:

int main() {
  while (TRUE) {
  ....
  ....
  }
  return 0;
}

> Any kind of example code would be greatly appreciated!

Check out this one:

http://developer.gnome.org/doc/GGAD/ggad.html

> 3) Finally, is there a website where you can see a complete list of
> functions/classes that are implemented in the GTK and their data members
> that they take on (kind of like man pages for every gtk_* instruction)?

Yep, there sure is:

http://www.gtk.org/api/

-- 
Bye, Warrior.

ICQ #24496762

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Tagline for Sunday, June 17, 2001, 00:05
--- A Bugless Program is an Abstract Theoretical Concept.