Gtk::RadioAction, how to set default action

[Frank Naumann <fnaumann boerde de>]

Hello!

I'm using the Gtk::UIManager and the Gtk::RadioAction classes to create a 
submenu of radio menu buttons. I tried to set the default activated button 
but can't find a way in gtkmm. I looked into gtk+ and they use the 
GtkRadioActionEntry struct and gtk_action_group_add_radio_actions() 
function to create radio menu buttons (you can specify the default 
activated action with the value property). Have I overseen something or 
is this missing in gtkmm?


Regards,
Frank