[Dynapi-Help] Implemented step-scrolling in viewpane, please check in..

[Clemens E. <lin...@we...>]

Hello again!

Because gecko-based browsers seem to have problems when scrolling a 
viewpane driven by events (if you pick the knob yourself and drag it it 
does not scroll fluently, but if you simply stay on the down/up-buttons 
it works great) I implemented step-scrolling which could act as a fix or 
as speed-up when complex layers should be scrolled (on slower systems).

I think the viewport.js should be quite up-to-date with cvs, but please 
copy my changes into the cvs-file and not overwrite the cvs-file with my 
copy. I maked all placed where source changed and it sould be easy to 
find the approriate places in CVS.
I also attached the explorer-viewport demo which shows howto use it 
(simply rewrote the constructor.)

Since I have just started with dynapi, feel free to rewrite parts or 
format it dynapi-compatible ;-)

Thanks, lg Clemens

PS: I found a bug in FireFoxRC which seems to render the knows in 
scrollbars wrong (no shadow-effekt). I'll have a look, maybe I can find 
the problem and can open a bug-report.