How can one have sub-optionmenus?

["Oliver Elphick" <olly lfix co uk>]

I would like to construct a set of option menus so that the top-level
menu contains a set of option menus.  The item chosen from one of
the submenus would be the item displayed for the top-level optionmenu.

It seems that I cannot do this, because an option menu is not a menu - 
it inherits from gtkbutton.h, and not from gtkmenu.h.  So I get assert
errors when I try to attach a submenu to the next level up.

Is there any way to do this?

(Using gtk+ 1.2.6)

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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