Re: Iterating through children

[Tristan Van Berkom <vantr touchtunes com>]

Ok, so you want a function to be called for *every* child widget of the 
toplevel window ?

With or without glade, you're going to need a reference to the toplevel.

If you want to reference the toplevel without useing a global pointer,
then you could use something like:
   
http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#gtk-widget-get-toplevel
within whatever callback you want.

The following example shows "a way" to "itterate through children" without
naming your widgets or anything like that.

Regards,
                                                   -Tristan

PS:
       You might want to note the complete irrelevence of the name
you choose for your 4 byte address space used to reference a UI object
and the dynamicly allocated charachter array stored in
GTK_WIDGET(object)->name which is used by the theeme engine
to associate graphic files to UI objects.

/******************************************************/
gtk_container_foreach(GTK_CONTAINER(toplevel_window),
           GTK_CALLBACK(ui_itterator), NULL);

void ui_itterator(GtkWidget *wid, gpointer unused)
{
   if (GTK_IS_CONTAINER(wid)) {
       gtk_container_foreach(GTK_CONTAINER(wid),
           GTK_CALLBACK(ui_itterator), NULL);
   }     
   my_func(wid);
}

void my_func(GtkWidget *wid)
{
   /* this func gets called for every widget that is child of 
"toplevel_window" */

}

/******************************************************/

Dimitar Haralanov wrote:

> On Fri, 17 Oct 2003 12:05:35 +0200
> Gus Koppel <gtk spamkiller bytechase cx> wrote:
>
>  
>
> > That's basically the same thing my function does. There are just two
> > main differences:
> > 1. my function operates independently from Glade, has no particular
> >   external references and doesn't need any extra precautions like
> >   Glade's GLADE_HOOKUP_OBJECT lists.
> >    
>
>         This is not entirely accurate, unfortunately (at least in my case).
> Using your function, I can't just find any widget! gtk_widget_get_name
> () returns the type of the widget that I am passing to it and not the
> name of the variable which points to the widget. For instance, if I have
> the following;
>
>         GtkWidget *widget;
>         gchar *name;
>         widget = gtk_check_button_new ();
>         name = gtk_widget_get_name (widget);
>
>         Now name will contain 'GtkCheckButton' and not 'widget'. Therefore, I
> can use it as I can use the libglade function. To use an example, I need
> something that will do the following:
>
>         GtkWidget *this;
>         GtkWidget *that;
>         ....
>
>         (in some callback)
>         GtkWidget *widget = <lookup_function> (that, "this");
>         
>         And at that point widget will be a pointer to this.
>
>  
>
> > I personally dislike such ideas.
> >    
>
>         Me too and that is why I am trying to figure out a way to do this but
> so far nothing!!
>
>