finding parent of options menu item?

[mcmahill mtl mit edu]

I'm trying to figure out how to get a pointer to the option menu inside
the callback for a menu.  I'm creating an options menu with the following
function.  In the callback,

void my_callback(GtkWidget *w, gpointer data)
{
  int which;

  which = GPOINTER_TO_INT(gtk_object_get_user_data(GTK_OBJECT(w)));

}

I get passed a pointer to the `item' from the units_menu_new function
(since thats the widget the callback is attached to).  w->parent is then a
pointer to `menu' from the units_menu_new function, but w->parent->parent
doesn't seem to point to opt_menu from units_menu_new but thats the
pointer I want to be able to get.  

Any suggestions?


GtkWidget *units_menu_new(const units_data *units, 
                          int initial,
                          void (*callback)(GtkWidget *, gpointer))

{
  GtkWidget *opt_menu;
  GtkWidget *menu;
  GtkWidget *item;
  int i;

  opt_menu = gtk_option_menu_new();
  menu = gtk_menu_new();

  i=0;
  while (units[i].name != NULL) {
    item = gtk_menu_item_new_with_label(units[i].name);
    gtk_signal_connect(GTK_OBJECT(item), "activate",
                       GTK_SIGNAL_FUNC(callback), 
                       (gpointer) gui);
    /* keep track of which entry this is */
    gtk_object_set_user_data(GTK_OBJECT(item),GINT_TO_POINTER(i));
    gtk_menu_append(GTK_MENU(menu), item);
    gtk_widget_show(item);

    i++;
  }

  /* attach our new menu to the options menu */
  gtk_option_menu_set_menu(GTK_OPTION_MENU(opt_menu), menu);

  /* pick the default (initial) selection */
  gtk_option_menu_set_history(GTK_OPTION_MENU(opt_menu), initial);

  gtk_widget_show_all(opt_menu);
  
  return opt_menu;
}

thanks for the help

-dan