Using a timer and a clip: rect() I've put together a small scrolling
demo.  It has "coder art" and some borrowed clouds and background
noise (gwt-voices).  Link is here:
 http://linuxstuff.org/scrolldemo/  - there's no controls yet, just
things scrolling by for a minute; uses alpha PNGs, so no IE6.

Every 80ms the animation clock ticks and things move; anything finer
grained it seemed FF3 wasn't able to keep up.

>From this experiment, it seems that things Aren't Quite There Yet for
doing such things with this stack; which is surprising to me.

Anyway, if anyone is interested the code is available at:

   http://linuxstuff.org/scrolldemo/AnimGWT.tar.bz2

The heart of the code is in MagicScroller.animate(). I'd love to know
if there's a better way to be doing this, or if there are any browser
profiling tools out there that anyone can recommend.

Cheers!

   JAmes

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