GtkCombo::set_use_arrows_always
void set_use_arrows_always(bool val);
This method is the adult version of
set_use_arrows() . The chief
difference is that the entry box text does not need to match the
text string in a list item in order for the arrows to be used. The
secondary difference is that the scrolling loops back to the start of
the list when the final item is reached, and vice versa.