Order of widgets when displayed on top of each other

["J. Davison de St. Germain" <dav cs utah edu>]

Hi,

  We are displaying widgets (containing GL windows) on "top" of each
other in our application.  We can drag the widgets around on a
"canvas".  Needless to say, when one widget is dragged over another,
it obscures the former widget.  It appears that the widgets are
rendered in the order that they are created/mapped.  My question is,
how can I change this order?  Ie, I would like to be able to toggle
which widget is on top.  Any help would be greatly appreciated.

   Thanks,
          Dave

-----------------------------------------------------------------------
- J. Davison de St. Germain         dav cs utah edu    (801) 581-4078 -
- Chief Software Engineer           http://www.cs.utah.edu/~dav       -
- SCI Institute, SE C-SAFE          University of Utah                -
-----------------------------------------------------------------------