temporal/spatial priority and Style Properties

[Lofton Henderson <lofton@rockynet.com>]

Scenario:  A picture contains 3 APS:  A, B, C.  They occur in that order in 
the metafile.  Suppose B partially overlaps and partially occludes A, and C 
partially overlaps and partially occludes B.

Now suppose setStyleProperties changes the appearance of B, necessitating a 
redraw of B.

Question:  The correct picture requires the redraw of all three APS (i.e., 
the whole picture) in the proper order (A-B-C), correct?  (I.e., one cannot 
simply redraw an affected target object, unless one has done some 
optimization calculations to ensure that nothing overlays the affected object.)

I think the answer has to be "yes", otherwise one would start to get all 
sorts of ugly picture damage while doing DOM visual enhancements on a 
picture.

Does anyone disagree?

(I'm just trying to be safe to not say something misleading in some new 
drafting that I'm doing.)

-Lofton.