GTK is OO.

[Muthiah Annamalai <dearestchum yahoo co in>]

Hello folks!

I mean GTK Is OO.
Widgets encapsulate other widgets.
There is a type system,GObjects and signals floating
all over the place. Please try to understand this
GTK architecture. 

[see developer.gnome.org and GObject
tutorials,GTK+ tutorials,before asking questions.
You can even try to search the mailinglist archives]

COMBO box encapsulates an entry and some kind of
menu.

How do you work this out ?

Lets say you want to set the entry of this combo box.
Well open the gtkcombo.h in your emacs [editor].

Then you see this:
<Code>
/* you should access only the entry and list fields
directly */
struct _GtkCombo {
        GtkHBox hbox;
  
        /*< public >*/
        GtkWidget *entry;
        
        /*< private >*/
        GtkWidget *button;
        GtkWidget *popup;
        GtkWidget *popwin;
        
        /*< public >*/
        GtkWidget *list;

        /*< private >*/
       ...
 };
</Code>



Now you just get your combo box widget pointer[combo],
and access this entry, and set its text.

gtk_entry_set_text(GTK_ENTRY(GTK_COMBO(combo)->entry),
"GTK+ is Object Oriented, and I understand this!");

Now your code must be something like this
<Code>

int main()
{
  GtkWidget *w,*box,*btn,*cmb;
  gtk_init(NULL,NULL);
  
  w=gtk_window_new(GTK_WINDOW_TOPLEVEL);
  box=gtk_hbox_new(0,0);
  
  cmb=gtk_combo_new();
  gtk_entry_set_text(GTK_ENTRY(GTK_COMBO(cmb)->entry),
"GTK+ is Object Oriented, and I understand this!");



  gtk_container_add(GTK_CONTAINER(w),box);
  gtk_box_pack_start_defaults(GTK_BOX(box),cmb);
   
  gtk_widget_show_all(w);
  
  gtk_main();   
}
</Code>

Can it get simpler? Use language bindings to GTK+ from
Python,C++,C# for OO like API.

GTK C API has powerful introspection capacities,
please make use of this before you ask questions..

Thanks
Muthu


                
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