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RE: [h-e-w] jittery scrollbar
From: |
Bingham, Jay |
Subject: |
RE: [h-e-w] jittery scrollbar |
Date: |
Fri, 27 Sep 2002 14:29:44 -0500 |
Veda,
I don't know that I have the answer to your question, but in an effort to help
you isolate the source of the problem I can tell you that I have the same emacs
version installed on Windows 2000 service pack 2 with a Microsoft optical wheel
mouse. I just tried dragging the scroll bar on a large file, on the README
file and on another file about the size of the README file. After several
attempts I finally observed what could be described as "jittering up and down".
I noticed that it seems to be more prevalent in small files than in large
files and seems to occur only when the scroll bar is being dragged very slowly.
I also noticed that when I would drag slowly emacs would start to repaint the
screen then stop repainting when it detected motion. This caused what I would
describe as a flickering. I suspect that the jittering is cause when the
scroll bar is hovering near a threshold and emacs can't decide which side of
the threshold the bar is on. I also noticed that in a small file the scroll
bar must be moved much farther than on a large file to cause movement of the
text. This may be related in some way.
Hope this helps.
-_
J_)
C_)ingham
. HP - NonStop Austin Software & Services - Software Product Assurance
. Austin, TX
. Language is the apparel in which your thoughts parade in public.
. Never clothe them in vulgar and shoddy attire. -Dr. George W. Crane-
-----Original Message-----
From: Veda Larson Palmer [mailto:address@hidden
Sent: Friday, September 27, 2002 1:43 PM
To: address@hidden
Subject: [h-e-w] jittery scrollbar
Dear Emacs folks,
When I drag the scrollbar on my Windows Emacs, the buffer text jitters
up and down by several lines, making it difficult to read as I scroll
through a file. This effect can be reproduced by scrolling through
the README file and is more noticeable toward the end of the file.
I am using:
GNU Emacs 21.2.1 from
ftp://ftp.gnu.org/gnu/windows/emacs/21.2/emacs-21.2-fullbin-i386.tar.gz
Windows 2000 service pack 2
Is this a known bug?
Thanks,
-Veda
P.S. The README says to mail address@hidden
but this bounces with a "User unknown" error.