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From: Jason Rumney <jasonr@gnu.org>
Cc: Ralf Angeli <angeli@caeruleus.net>, emacs-devel@gnu.org
Subject: Re: Scrollbar bugs in Windows port
Date: Mon, 05 Jun 2006 22:26:57 +0100	[thread overview]
Message-ID: <uk67vcmzi.fsf@jasonrumney.net> (raw)
In-Reply-To: <umzcsbmt0.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 05 Jun 2006 01:03:55 +0300")

Eli Zaretskii <eliz@gnu.org> writes:

> I cannot reproduce the last one on my system; maybe it depends on the
> details of the screen resolution.  I will try to look into the other
> two when I have time.

I can reproduce all three, I think they are related - perhaps an
off-by-one or rounding bug somewhere in the calculations that relate
scrollbar position to buffer position and vice-versa. I have looked at
this code several times in the past, but whenever I've made changes to
fix one test case, something else has broken. I had another look now,
and noticed that part of the confusion is caused by workarounds for
obsolete versions of Windows NT that we haven't supported since at
least Emacs 19.34. So I simplified the code for anyone who wants to
look at it (in w32term.c, search for SCROLLINFO). I also noticed that
there are a lot of places in the code that deal with scrolling, so
perhaps the problem in the past is that only some of those got
updated.

  parent reply	other threads:[~2006-06-05 21:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-04 21:10 Scrollbar bugs in Windows port Ralf Angeli
2006-06-04 22:03 ` Eli Zaretskii
2006-06-05  7:58   ` Ralf Angeli
2006-06-05 19:49     ` Eli Zaretskii
2006-06-05 20:52       ` Ralf Angeli
2006-06-05 21:26   ` Jason Rumney [this message]
2006-06-28 19:31     ` Stephan Hennig
2006-06-28 21:30       ` Eli Zaretskii
2006-06-29  9:40         ` Stephan Hennig
2006-06-29 19:07           ` Eli Zaretskii

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