color gradients in windows?

[Gary Scavone <gary ccrma stanford edu>]

I've looked through some of the documentation but I haven't been able
to figure out whether it is possible to have gtk windows with
background color gradients.  For example, I wrote a gtk program for
psychoacoustic tests that lets the user move items (buttons) around in
a gtk_layout widget.  We'd now like to define regions within the
gtk_layout widget by having different background colors.  Is that
currently possible?

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Gary Scavone
Center for Computer Research in Music & Acoustics
Stanford University
gary ccrma stanford edu
http://www-ccrma.stanford.edu/~gary/
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