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address@hidden: Re: address@hidden: Scrolling down fails to refresh.]

From: Richard Stallman
Subject: address@hidden: Re: address@hidden: Scrolling down fails to refresh.]]
Date: Wed, 04 Sep 2002 22:47:13 -0400

Is this really Windows-specific?  If so, would someone who works on
Windows please look at it?

------- Start of forwarded message -------
X-Authentication-Warning: gerd.free-bsd.org: gerd set sender to address@hidden 
using -f
Sender: address@hidden
To: address@hidden
Subject: Re: address@hidden: Scrolling down fails to refresh.]
From: address@hidden (Gerd Moellmann)
Date: 04 Aug 2002 15:25:32 +0200
In-Reply-To: <address@hidden>
X-Sender: address@hidden

Richard Stallman <address@hidden> writes:

> Would you please look at this?
> He included a 3 meg screen capture, so I have deleted that;
> please tell me if you want it.
> ------- Start of forwarded message -------
> From: "Bernard A Badger" <address@hidden>
> To: <address@hidden>
> Subject: Scrolling down fails to refresh.
> X-Priority: 3 (Normal)
> X-MSMail-Priority: Normal
> Importance: Normal
> X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700
> X-MS-TNEF-Correlator: <address@hidden>
> Sender: address@hidden
> Date: Mon, 13 May 2002 16:47:27 -0400
> This is a multi-part message in MIME format.
> - ------=_NextPart_000_002D_01C1FA9D.DE765130
> Content-Type: text/plain;
>       charset="iso-8859-1"
> Content-Transfer-Encoding: 7bit
> The following is a screen capture (Alt-Print Scrn) of Emacs as it scrolls 
> badly
> and does not
> refresh properly.  
> GNU Emacs 21.2.1 (i386-msvc-nt5.0.2195) of 2002-03-19 on buffy
> If you cannot see the embedded picture, here's a description of the problem.
> When I scroll down the window (Pull scrollbar down, that is) and there is a
> "Stay on Top"
> window overlapping the bottom of the emacs window
> (such as Rational Purify's "Purify Instrumentation" progress window, 
> or the Windows "Task Manager" window),  
> the graphics of the obscuring window are copied up as we scroll.  
> Sometimes they are erased in the end, sometimes not.
> (I say "scroll down" when the window goes down the file, the corresponding
> text appears to go up the screen.)
> This can occur multiple times, until there is a "chatter" of wrongly-scrolled
> window parts.
> I suspect this has something to do with the incorrect scrolling that occurs
> anyway.  
> This is when the size of the scroll bar is re-computed based on the number of
> characters 
> on-screen.  It should really be based on the number of lines.  I think that in
> the end it is, and
> it's the temporary "approximate" scrolling that is to blame.

That looks a lot like another report for Emacs on MS-Windows, for
which Jason said it was Windows-specific.
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