* A scrolling problem with Emac trunk
@ 2012-12-17 11:27 Angelo Graziosi
2012-12-17 13:39 ` martin rudalics
0 siblings, 1 reply; 13+ messages in thread
From: Angelo Graziosi @ 2012-12-17 11:27 UTC (permalink / raw
To: emacs
I don't know if this has been already flagged, if it is a new behavior
or if it is a bug...
Anyway I want to flag for completeness and apologize if it has already
flagged.
The following regards a GTK build.
Sometimes I need to have two views of the same (long) buffer. Suppose I
have a text buffer of 200 lines and I need a view of the first 25 lines
and a view of the last 25 lines. Usually I do this opening another
frame, C-x 5 2, and scrolling (with mouse wheel or the scroll bar) so to
have the two views.
With current trunk (rev. 111253) this does not work any more.. To be
short, when I scroll in a frame the other scrolls almost in the same way
so that both frames shows the same view... It is impossible to have
different views of a long buffer.
Instead, the trunk rev. 111175 seems to behave correctly and I can have
two different views in two frames of the same long buffer.
Ciao,
Angelo.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 11:27 A scrolling problem with Emac trunk Angelo Graziosi
@ 2012-12-17 13:39 ` martin rudalics
2012-12-17 14:10 ` Xue Fuqiao
` (2 more replies)
0 siblings, 3 replies; 13+ messages in thread
From: martin rudalics @ 2012-12-17 13:39 UTC (permalink / raw
To: Angelo Graziosi; +Cc: emacs
> Sometimes I need to have two views of the same (long) buffer. Suppose I
> have a text buffer of 200 lines and I need a view of the first 25 lines
> and a view of the last 25 lines. Usually I do this opening another
> frame, C-x 5 2, and scrolling (with mouse wheel or the scroll bar) so to
> have the two views.
>
> With current trunk (rev. 111253) this does not work any more.. To be
> short, when I scroll in a frame the other scrolls almost in the same way
> so that both frames shows the same view... It is impossible to have
> different views of a long buffer.
>
> Instead, the trunk rev. 111175 seems to behave correctly and I can have
> two different views in two frames of the same long buffer.
Same here on Windows XP for some value of "almost". Irreproducible with
Emacs -Q. Does it happen with Emacs -Q on your system?
FWIW, here the buffer in the "other" frame does not scroll but its
window's modeline values change to the same as in the other frame.
Maybe Stefan's attempt to synchronize selected frame and selected window
misfired. Pure speculation, of course.
martin
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 13:39 ` martin rudalics
@ 2012-12-17 14:10 ` Xue Fuqiao
2012-12-17 17:33 ` martin rudalics
2012-12-17 20:02 ` Angelo Graziosi
2 siblings, 0 replies; 13+ messages in thread
From: Xue Fuqiao @ 2012-12-17 14:10 UTC (permalink / raw
To: martin rudalics; +Cc: emacs, Angelo Graziosi
On Mon, 17 Dec 2012 14:39:00 +0100
martin rudalics <rudalics@gmx.at> wrote:
> Same here on Windows XP for some value of "almost". Irreproducible with
> Emacs -Q. Does it happen with Emacs -Q on your system?
It also happens on my system:
GNU Emacs 24.3.50.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.13) of 2012-12-17 on Emacs
But not in the Emacs pretest 24.2.91.
--
Best regards, Xue Fuqiao.
http://www.emacswiki.org/emacs/XueFuqiao
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 13:39 ` martin rudalics
2012-12-17 14:10 ` Xue Fuqiao
@ 2012-12-17 17:33 ` martin rudalics
2012-12-17 18:02 ` Stefan Monnier
2012-12-17 19:17 ` Stefan Monnier
2012-12-17 20:02 ` Angelo Graziosi
2 siblings, 2 replies; 13+ messages in thread
From: martin rudalics @ 2012-12-17 17:33 UTC (permalink / raw
To: Angelo Graziosi; +Cc: emacs
Verified. The problem is due to
revno: 111232
committer: Stefan Monnier <monnier@iro.umontreal.ca>
branch nick: trunk
timestamp: Fri 2012-12-14 10:52:43 -0500
message:
* src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
in sync.
Reverting this change and the subsequent
revno: 111232
committer: Stefan Monnier <monnier@iro.umontreal.ca>
branch nick: trunk
timestamp: Fri 2012-12-14 10:52:43 -0500
message:
* src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
in sync.
makes the problem disappear.
martin
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 17:33 ` martin rudalics
@ 2012-12-17 18:02 ` Stefan Monnier
2012-12-17 19:24 ` Eli Zaretskii
2012-12-17 19:17 ` Stefan Monnier
1 sibling, 1 reply; 13+ messages in thread
From: Stefan Monnier @ 2012-12-17 18:02 UTC (permalink / raw
To: martin rudalics; +Cc: emacs, Angelo Graziosi
> * src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
> in sync.
> Reverting this change and the subsequent
Could someone who understands the redisplay code better than I figure
out why the above change causes those problems?
Stefan
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 18:02 ` Stefan Monnier
@ 2012-12-17 19:24 ` Eli Zaretskii
0 siblings, 0 replies; 13+ messages in thread
From: Eli Zaretskii @ 2012-12-17 19:24 UTC (permalink / raw
To: Stefan Monnier; +Cc: rudalics, angelo.graziosi, emacs-devel
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 17 Dec 2012 13:02:05 -0500
> Cc: emacs <emacs-devel@gnu.org>, Angelo Graziosi <angelo.graziosi@alice.it>
>
> > * src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
> > in sync.
> > Reverting this change and the subsequent
>
> Could someone who understands the redisplay code better than I figure
> out why the above change causes those problems?
I will try.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 17:33 ` martin rudalics
2012-12-17 18:02 ` Stefan Monnier
@ 2012-12-17 19:17 ` Stefan Monnier
2012-12-17 21:28 ` martin rudalics
1 sibling, 1 reply; 13+ messages in thread
From: Stefan Monnier @ 2012-12-17 19:17 UTC (permalink / raw
To: martin rudalics; +Cc: emacs, Angelo Graziosi
> revno: 111232
> committer: Stefan Monnier <monnier@iro.umontreal.ca>
> branch nick: trunk
> timestamp: Fri 2012-12-14 10:52:43 -0500
> message:
> * src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
> in sync.
It's actually the 111231 that's the problem (it's probably what you
meant).
Changing selected_window without sync'ing point is at the root of
the problem. Often it's not a problem because we set selected-window
back to its previous value before it can cause problems, but in the
select_frame_for_redisplay that's not the case if redisplay moves point
(as it does when it needs to scroll).
I believe it's fixed now.
Stefan
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 19:17 ` Stefan Monnier
@ 2012-12-17 21:28 ` martin rudalics
2012-12-18 10:57 ` Angelo Graziosi
0 siblings, 1 reply; 13+ messages in thread
From: martin rudalics @ 2012-12-17 21:28 UTC (permalink / raw
To: Stefan Monnier; +Cc: emacs, Angelo Graziosi
> It's actually the 111231 that's the problem (it's probably what you
> meant).
Yes.
> Changing selected_window without sync'ing point is at the root of
> the problem. Often it's not a problem because we set selected-window
> back to its previous value before it can cause problems, but in the
> select_frame_for_redisplay that's not the case if redisplay moves point
> (as it does when it needs to scroll).
I see.
> I believe it's fixed now.
Works here so far. But I usually never use more than one frame
so I leave it to the others to tell. Thanks for the fix.
martin
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 21:28 ` martin rudalics
@ 2012-12-18 10:57 ` Angelo Graziosi
2012-12-18 12:48 ` martin rudalics
2012-12-20 18:49 ` Angelo Graziosi
0 siblings, 2 replies; 13+ messages in thread
From: Angelo Graziosi @ 2012-12-18 10:57 UTC (permalink / raw
To: martin rudalics; +Cc: Stefan Monnier, emacs
Ciao Martin,
Il 17/12/2012 22.28, martin rudalics ha scritto:
>
> Works here so far. But I usually never use more than one frame
> so I leave it to the others to tell. Thanks for the fix.
Works here too.. Anyway, now I notice that, switching from a frame to
the other (i.e. moving the mouse pointer and clicking), in the abandoned
frame, the text is selected below the cursor position...
The screenshot I have prepare is about 600K, so I will send it only to a
few of you..
Ciao,
Angelo.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-18 10:57 ` Angelo Graziosi
@ 2012-12-18 12:48 ` martin rudalics
2012-12-20 18:49 ` Angelo Graziosi
1 sibling, 0 replies; 13+ messages in thread
From: martin rudalics @ 2012-12-18 12:48 UTC (permalink / raw
To: Angelo Graziosi; +Cc: Stefan Monnier, emacs
> Works here too.. Anyway, now I notice that, switching from a frame to
> the other (i.e. moving the mouse pointer and clicking), in the abandoned
> frame, the text is selected below the cursor position...
Can't observe that. But I'm raising frames automatically.
OTOH here both modelines get highlighted as if both windows
were selected.
martin
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-18 10:57 ` Angelo Graziosi
2012-12-18 12:48 ` martin rudalics
@ 2012-12-20 18:49 ` Angelo Graziosi
2012-12-20 18:59 ` Eli Zaretskii
1 sibling, 1 reply; 13+ messages in thread
From: Angelo Graziosi @ 2012-12-20 18:49 UTC (permalink / raw
To: emacs
Il 18/12/2012 11.57, Angelo Graziosi ha scritto:
> Ciao Martin,
>
> Il 17/12/2012 22.28, martin rudalics ha scritto:
>>
>> Works here so far. But I usually never use more than one frame
>> so I leave it to the others to tell. Thanks for the fix.
>
> Works here too.. Anyway, now I notice that, switching from a frame to
> the other (i.e. moving the mouse pointer and clicking), in the abandoned
> frame, the text is selected below the cursor position...
>
> The screenshot I have prepare is about 600K, so I will send it only to a
> few of you..
From bug #13225 Martin Rudalics and Eli Zaretskii wrote
M.
> There might still be glitches with the region as Angelo mentioned in
> the previous thread
E.
> Could someone please post a complete precise recipe, starting from
> "emacs -Q"?
The glitches have gone in rev. 111279, so I think what I noticed is
fixed. I think we don't need any more a precise recipe... :-)
Thank you,
Angelo.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-20 18:49 ` Angelo Graziosi
@ 2012-12-20 18:59 ` Eli Zaretskii
0 siblings, 0 replies; 13+ messages in thread
From: Eli Zaretskii @ 2012-12-20 18:59 UTC (permalink / raw
To: Angelo Graziosi; +Cc: emacs-devel
> Date: Thu, 20 Dec 2012 19:49:36 +0100
> From: Angelo Graziosi <angelo.graziosi@alice.it>
>
> > Works here too.. Anyway, now I notice that, switching from a frame to
> > the other (i.e. moving the mouse pointer and clicking), in the abandoned
> > frame, the text is selected below the cursor position...
> >
> > The screenshot I have prepare is about 600K, so I will send it only to a
> > few of you..
>
> From bug #13225 Martin Rudalics and Eli Zaretskii wrote
>
> M.
> > There might still be glitches with the region as Angelo mentioned in
> > the previous thread
>
> E.
> > Could someone please post a complete precise recipe, starting from
> > "emacs -Q"?
>
> The glitches have gone in rev. 111279, so I think what I noticed is
> fixed. I think we don't need any more a precise recipe... :-)
OK, thanks.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: A scrolling problem with Emac trunk
2012-12-17 13:39 ` martin rudalics
2012-12-17 14:10 ` Xue Fuqiao
2012-12-17 17:33 ` martin rudalics
@ 2012-12-17 20:02 ` Angelo Graziosi
2 siblings, 0 replies; 13+ messages in thread
From: Angelo Graziosi @ 2012-12-17 20:02 UTC (permalink / raw
To: martin rudalics; +Cc: emacs
Ciao Martin,
Il 17/12/2012 14.39, martin rudalics ha scritto:
>
> Same here on Windows XP for some value of "almost". Irreproducible with
> Emacs -Q. Does it happen with Emacs -Q on your system?
I can reproduce it also with emacs -Q (here is on Cygwin...)
Ciao,
Angelo.
^ permalink raw reply [flat|nested] 13+ messages in thread
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Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-12-17 11:27 A scrolling problem with Emac trunk Angelo Graziosi
2012-12-17 13:39 ` martin rudalics
2012-12-17 14:10 ` Xue Fuqiao
2012-12-17 17:33 ` martin rudalics
2012-12-17 18:02 ` Stefan Monnier
2012-12-17 19:24 ` Eli Zaretskii
2012-12-17 19:17 ` Stefan Monnier
2012-12-17 21:28 ` martin rudalics
2012-12-18 10:57 ` Angelo Graziosi
2012-12-18 12:48 ` martin rudalics
2012-12-20 18:49 ` Angelo Graziosi
2012-12-20 18:59 ` Eli Zaretskii
2012-12-17 20:02 ` Angelo Graziosi
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