Re: Gtkcombo

["Emmanuel Deloget" <logout free fr>]

Sorry Carlos... Just saw I post the response to you only :)
This one is posted to the list with the previous answer

> > Hi Carlos,
> >
> > I'm not sure this is a good idea.
> > combo box strings may come from a configuration file
> > or from user input. Moreover you may have a lot of
> > strings in the combo box and this should really be
> > a pain.
> >
> > A way to achieve the same is to work on the public GtkList
> > in the GtkCombo.
> >
> > AFAIK v1.2.x GtkList structure contains two members
> > called children and selection. children is a
> > GList of GtkListItem as well as selection. Since you
> > have only one selection, you can run through the
> > children list to find the GtkListItem which is held
> > in the selection list.
> >
> > I just saw that my english is worse than ever so I
> > should better provide a small snip of code :)
> >
> > gint gtk_combo_get_item_pos(GtkWidget *p_widget)
> > {
> >   GtkList *p_list = GTK_LIST(GTK_COMBO(p_widget)->list);
> >   GList *p_children;
> >   GList *p_sel;
> >
> >   p_sel = p_list->selection;
> >   p_child = p_list->children;
> >
> >   return (g_list_index(p_children, p_sel->data));
> > }
> >
> > Hope this
> > a) is not too false
> > b) helps
>
> I totally agree. My purpose was only to get him started on 
> how to use a combo box. Go through the list is certainly a
> much better option (perhaps the only possible) if the information 
> comes from a configuration file, as you said. 
>
> Anyway, the difference between a combo box and an 
> option menu is that in the combo box the user
> is free to write something different, so usually
> you have to parse the entry, checking for errors,
> which implies some string manipulation. To handle
> properly a combo is a bit more than just know the
> order of the selected item. What happens if the
> user wrote something different in the entry? that
> should NOT be an error just by itself. If the user

    I agree with this. As an addition to the former
    asnswer I made, I would like to add that when the
    combo entry is modified, the list selection is
    modified too. So the gtk_combo_get_item_pos()
    function will return -1. In this case, you can
    parse the entry in order to validate it. 

> cannot choose different, unlisted, options, then the
> right choice is an option menu, not a combo box.
>
> Carlos

Yours,

Emmanuel