Perhaps you could simply adapt the four color selectors available in
the GIMP; the first is what you describe. The other three do the same
thing, but with different interfaces. Obviously, one wants to change
more than one color component at the same time, so the four interfaces
may need some adaption.
--
Robert J. Chassell
[EMAIL PROTECTED] GnuPG Key ID: 004B4AC8
http://www.rattlesnake.com http://www.teak.cc
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