[Gimp-print-devel] Re: [Gimp-developer] Bad news about piecewise curves in the Print plugin

[Robert L K. <rl...@al...>]

   From: Sven Neumann <sv...@gi...>
   Date: 30 May 2004 12:44:05 +0200

   Robert L Krawitz <rl...@al...> writes:

   > Unfortunately, the gtkcurve widget doesn't allow setting the control
   > points of the curve, only setting a dense curve
   > (gtk_curve_set_vector).  There may be a back door way of doing it, but
   > that carries obvious hazards.

   The GtkCurve widget is basically deprecated and scheduled for removal
   from GTK+. I would suggest that if you need such a widget you simply
   copy the code and change the namespace. You can then add the API you
   need.

So if we have to do this anyway, we might as well use this as an
opportunity to improve the curve widget.  Mike Porter has contacted me
and will send me some improvements he made several years ago.  Some
specific things I think we could do:

1) Offer an entry box to add a new control point/modify an existing
   one.

2) Directly support gamma curves (the current widget creates a dense
   curve of the correct gamma).

3) Offer a magnifier/scroll bar.

-- 
Robert Krawitz                                     <rl...@al...>

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lp...@uu...
Project lead for Gimp Print   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton