Re: vertical scrollbar error on MS Windows

[Stefan Monnier]

> Here is another fix for the scrollbars.  From the approach
> it calculates the thumb length once on mouse down and 
> then leaves bar parameters alone during dragging.

This approach suffers from the same problems.
I only know of two simple solutions:
1 - set the thumb size to 0 while dragging.
2 - make the thumb size "fixed" and arrange that when it hits bottom,
    then the start of the thumb corresponds to position point-max.

The best solution is to change the toolkit such that it doesn't hide from
you the information that the mouse was moved past the bottom of the
scrollbar.  This is what Xaw does.  It's generally trivial to do,
technically, but it usually hits a human brick wall.


        Stefan