Can UIManager handle all kinds of widgets?

[Matthias Kaeppler <nospam digitalraid com>]

Hi,

I was wondering what kind of widgets are manageable by the UIManager 
class? The gtkmm tutorial uses it to manage menus and toolbars, but the 
XML-like code to describe the interface could easily apply to other 
widgets as well I guess.

For example:

  <ui>
     <menu name='my_menu'>
          ...
     </menu>
     <toolbar name='some_toolbar'>
          ...
     </toolbar>
  </ui>

What other keywords are allowed in place of "menu" and "toolbar"?

--
Matthias Kaeppler