GtkCombo: retrieving the index of the selection

[Fabian Bastin <bastin fabian freebel be>]

I use a GtkCombo widget in my program, and I would to know the index of the
selection when the user press a button (the callback has the combo as data).
Unfornulately, I haven't found any function that performs this. I can get the
text of the selection, but not the position in the list.

I have wrotten this code to perform this, but I think that is not clean and I
would like to know if there is no better way to do what I want.

int gtk_combo_index(GtkCombo *combo)
{
if (combo) {
int idx = 0;
GList *clist;
GtkListItem *li;
GtkWidget *label;
char *text = gtk_entry_get_text(GTK_ENTRY(combo->entry));
char *text2;

clist = GTK_LIST(combo->list)->children;

while (clist) {
li = GTK_LIST_ITEM(clist->data);
/* the constant "gtk-combo-string-value is defined in gtkcombo.c, but
* an usage like this one is certainly bad */
text2 = (char *)gtk_object_get_data(GTK_OBJECT((GtkListItem *)
                                              (clist->data)),
                                   "gtk-combo-string-value");
if (!text2) {
 label = GTK_BIN(li)->child;
 if (label)
   if (GTK_IS_LABEL(label)) gtk_label_get(GTK_LABEL(label), &text2);
}
if (text2) {
 if (!strcmp(text2, text))
 return idx;
}
idx++;
clist = clist->next;
}
}

return -1;
}

Thank you for your help.

Fabian Bastin

-- 
       Fabian Bastin
       FUNDP, Dipartement de mathimatiques
       GRT (Groupe de Recherche sur les Transports)
       Rempart de la Vierge 8
       B-5000 Namur
Tel:   +32 (0)81 724923
Fax:   +32 (0)81 724914
email: fbas@math.fundp.ac.be
       fabian.bastin@fundp.ac.be