Re: Erroneous selection extension in Emacs version 22.1 for Win32

[Eli Zaretskii <eliz@gnu.org>]

[Please keep the discussion on the mailing list.]

> Date: Sun, 10 Jun 2007 23:19:59 -0700 (PDT)
> From: Bostjan Vilfan <bvilf@yahoo.com>
> 
> The meaning of "extension of selection" is the one you gave: yellow area is extended. On receiving your reply I repeated the experiment, and observed a slightly nuanced outcome, as follows.
> 
> First of all, I used "runemacs -Q" as you did, although the result is the same for a plain "runemacs". Then on the first try I loaded a file that was larger than the emacs window (allowing the scroll bar to be used), then I selected  a word on the second line (painting it yellow), and performed a scroll. To my consternation, the operation was correct (without extension of selection). However, I later found that the behavior was more complicated. Correct behavior results only if the scroll is performed slowly. If the scroll is performed quickly, extension of selection occurs. The interesting thing is that once an extension of selection occurs as described, even a slow scroll results in extension of selection.
> 
> After this I rechecked emacs version 21.3 for Win32, and found that no matter how the scroll is performed, it always comes out correct.

I can confirm that with that recipe I can reproduce the problem on my
machine.  Thanks.