Re: MenuItem callback weirdness - partial answer

[Patrice St-Gelais <patrice st-gelais oricom ca>]

Hi all,

I finally solved the problem, at least in part:  an option menu is a kind
of button to which a menu is linked.  The active label is "borrowed" by the
option menu button from the menu item.  So a callback function like this
does the job, connected to the "activate" signal of each menu item - the
option menu widget must be embedded in the data:

void omenu_callb(GtkWidget *wdg, gpointer data) {
 gchar *label;
my_struct *str;
 str = (my_struct *) data;
 if (!GTK_IS_LABEL(GTK_BIN(str->omenu)->child))
 // First call, after we have set the option menu with a given value,
already in str->some_allocated_string
    return;
 gtk_label_get(GTK_LABEL(GTK_BIN(str->omenu)->child), &label);
 strcpy(str->some_allocated_string,label);
}

I wonder why we shouldn't be able to connect the function to the option
menu globally, but I was not able to find a working signal.  Button signals
("clicked", "realeased"), in the option menu hierarchy, don't seem to work.

______________

Patrice St-Gelais a écrit :

> Hi all,
>
> I'm developping with Gtk 1.2.x.  I connect a callback function to each
> menu item of an option menu. The function extracts the label of the last
> selected menu item.
>
> The function looks like this:
>
> void omenu_callb(GtkWidget *wdg, gpointer data) {
>  gchar *label;
> my_struct *str;
>  str = (my_struct *) data;
>  if (!GTK_CHECK_MENU_ITEM(wdg)->active)
>   return;
>  gtk_label_get(GTK_LABEL(GTK_BIN(wdg)->child), &label);
>  strcpy(str->some_allocated_string,label);
> }
>
> It works the first time the callback is executed, when I set the default
> option.  But at each subsequent call, GTK_BIN(wdg)->child is NULL.
>
> GTK_IS_MENU_ITEM(wdg) is always TRUE, though, and "wdg" is the right
> MenuItem (the widget address is the same for the same choice).

....