key and patches

[Daniel J S. <dan...@ie...>]

I've cleaned up some of the layout code motivated by better control of 
key placement.  It wasn't too bad.  Basically, it was the layout and 
positioning of the key that was a hodge-podge of case statements here 
and there.  After organizing some things a bit more, there seems to have 
been a few bits of cruft in there.  (I.e., code setting variables that 
weren't used before being set to something else.)

I think it is a good start and you will probably like it.  With left, 
right, center, top, bottom one can choose one of 9 automatic locations 
either inside or outside of the graph boundary.  The words "outside" and 
"under" aren't quite backward compatible, but they are very close to 
compatible.  The <position> has been enhanced in that 'left', 'right', 
'center', 'bottom', 'top' control the alignment with respect to the 
point.  (Think of the key as a gnuplot label.)  However, issuing one of 
those position keywords without the <position> will cause the key to go 
back to automatic mode.  (Again, darn near backward compatible.)  The 
mods only apply for 2d plots.  3d plot key layout should be discussed 
before making any changes.  There is some command-line documentation. 
 There is a demo called 'key.dem' which will immediately give you the 
idea of how auto/manual positioning works.

The patches are on SourceForge.  If you want to try, the order of patch 
application would be:

key_28jul2004.patch     (cleaner enumerations but unaltered gnuplot 
behavior)
with_image_29jul2004.patch
add_key_29jul2004.patch

Fair warning:  Don't take this as too crass, but I won't be updating 
these patches anymore beyond the near future.

Dan