GtkOrientable: Can widgets now be flipped?

[Murray Cumming <murrayc murrayc com>]

The new GtkOrientable's documentation
http://library.gnome.org/devel/gtk/unstable/gtk-Orientable.html#gtk-Orientable.description
says:
"Historically, such widgets have been realized as subclasses of a common
base class (e.g GtkBox/GtkHBox/GtkVBox and
GtkScale/GtkHScale/GtkVScale). GtkOrientable is more flexible in that it
allows the orientation to be changed at runtime, allowing the widgets to
'flip'.

All those old widgets do now implement GtkOrientation:
http://library.gnome.org/devel/gtk/unstable/gtk-Orientable.html#gtk-Orientable.implementations

So can they actully be flipped at runtime now? The documentation seems
to suggest that they can't if they still use the old common base
classes.

-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com