Re: [dubois@doublefine.com: mouse-drag.el and automatic-hscrolling interact poorly]

[John Heidemann <johnh@isi.edu>]

On Sat, 26 Oct 2002 16:15:29 EDT, Richard Stallman wrote: 
>[I sent this message a few weeks ago but did not get a response.]
>
>Could you please take a look at this problem?

Thanks for the resend.  I think I'm able to reproduce the problem.
I'll add it to my queue to look at.

   -John Heidemann


>
>------- Start of forwarded message -------
>Envelope-to: rms@gnu.org
>Delivery-date: Wed, 09 Oct 2002 19:55:27 -0400
>From: Paul Du Bois <dubois@doublefine.com>
>To: bug-gnu-emacs@gnu.org
>Subject: mouse-drag.el and automatic-hscrolling interact poorly
>X-OriginalArrivalTime: 09 Oct 2002 23:57:04.0956 (UTC) FILETIME=[918C67C0:01C26FEF]
>Sender: bug-gnu-emacs-admin@gnu.org
>Date: 9 Oct 2002 16:57:04 -0700
>
>This bug report will be sent to the Free Software Foundation,
>not to your local site managers!
>Please write in English, because the Emacs maintainers do not have
>translators to read other languages for them.
>
>Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
>and to the gnu.emacs.bug news group.
>
>In GNU Emacs 21.2.1 (i386-msvc-nt5.1.2600)
> of 2002-03-19 on buffy
>configured using `configure --with-msvc (12.00)'
>Important settings:
>  value of $LC_ALL: nil
>  value of $LC_COLLATE: nil
>  value of $LC_CTYPE: nil
>  value of $LC_MESSAGES: nil
>  value of $LC_MONETARY: nil
>  value of $LC_NUMERIC: nil
>  value of $LC_TIME: nil
>  value of $LANG: ENU
>  locale-coding-system: iso-latin-1
>  default-enable-multibyte-characters: nil
>
>Please describe exactly what actions triggered the bug
>and the precise symptoms of the bug:
>
>;; eg
>
>(require 'mouse-drag)
>(define-key global-map [M-down-mouse-1] 'mouse-drag-drag)
>(setq automatic-hscrolling t)
>;; switch to an interesting buffer
>(setq truncate-lines t)
>
>;; 1. put point in the middle of a line
>;; 2. do a leftward M-drag
>;; 3. Notice that as the cursor approaches the left edge of the
>;; screen, the hscroll resets to 0
>
>A quick fix is to modify the (let (...) ) in mouse-drag-safe-scroll to
>temporarily unset automatic-hscrolling.  I don't know whether that's a real
>fix or just a workaround -- I don't understand this comment in scroll-right:
>
>   If `automatic-hscrolling' is non-nil, the argument ARG modifies
>   a lower bound for automatic scrolling, i.e. automatic scrolling
>   will not scroll a window to a column less than the value returned
>   by this function.
>
>p
>
>
>
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