Hello Michael,
on my Linux box Your change made mouse scrollbar useless - it was just
stopping at two positions - top and bottom. To get to middle of
scrollable view I had to use those clickable areas (dunno their name).
Previous version, that I restored, was working just fine - now again I
can scroll with mouse wheel or clickable area. Seems like keyboard
arrows are not working 
I reverted my local copy - keyboard arrows still doesn't work and
scrolling is only useable with clicking or dragging scrollbar. Mouse
roller is not useable, as it works like Home/End keys in other apps.
Hm. Home/End/PageUp/Down keys also doesn't work.
I would assume there's some problem with Tcl/Tk version You use on
Mac, as there was some reason why such code was working for years in
Linux version. I'm running 32bit Gentoo with tcl-8.4.19
As current Tcl/Tk GUI development is almost frozen and if problems
arise from newer tcl/tk versions (>8.4), I would propose to freeze
GRASS tcl/tk requirements to 8.4.
Summary:
Scrolling with keyboard doesn't work (#435)
Old scrolling code doesn't work for some reason on Macs
Other developers, please, make some tests and report results:
cd grass64_release/lib/gtcltk
svn up -r 35413
make
gis.m
add a raster layer and try to scroll lower pane (Display raster layer)
and raster map selection window (Select Item - Raster Map). Does
scrolling is smooth or jumpy?
close gis.m
svn up -r 35412
make
gis.m
repeat tests. Has scrolling changed? Better or worse?
Report results to -dev list or to me directly. Don't forget to write
Your OS and Tcl/Tk version.
Thank You!
Markus - this issue needs to be solved before 6.4.0 goes final. Minor
but really annoying issue.
Maris.
2009/1/16, Michael Barton <michael.barton@asu.edu>:
Maris,
Your reversion of my change in select.tcl broke the scroll bars for
activation by the mouse scroll wheel. Now the scroll wheel will make
the thumb go up but not down. What problem does your change fix? If we
need to find a different solution that solves both problems, that's
fine. But please don't assume that my change was for no reason at all.Michael