* bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font
@ 2014-10-22 9:03 Anders Lindgren
2014-10-22 13:43 ` martin rudalics
0 siblings, 1 reply; 4+ messages in thread
From: Anders Lindgren @ 2014-10-22 9:03 UTC (permalink / raw)
To: 18789
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Hi!
Under MS-Windows, it appears that the width of the frame only can be a
multiple of the character width. Unfortunately, the width of the fringes
and scrollbars used by side-by-side windows does not always add up to full
characters -- if you use a font other than the default. The effect is that
when using side-by-side windows, you could get a partial column. (Partial
columns are not desirable, for example, they work differently when you
place the cursor on the end of a full line.)
Steps to repeat 1:
emacs -q
Switch to *scratch*: C-x b RET
Evaluate:
(set-default-font
(create-fontset-from-ascii-font
"-raster-Terminal-bold-r-normal-normal-8-60-96-96-c-*-ms-oemlatin"))
Split the window using: C-x 3
Insert a long line: C-u 37 x
Here, the cursor is at the end of the line in the left window, it is
rendered in the right fringe. (OK)
Go to the other window: C-x o
Place the cursor at the end: C-x >
Here, the cursor is visible in the partially visible column. (NOT OK)
Steps to repeat 2:
emacs -q
Evaluate the following:
(set-frame-width (selected-frame) 607 nil t)
(frame-pixel-width)
Here, 632 is returned.
(set-frame-width (selected-frame) 608 nil t)
(frame-pixel-width)
Here, 640 is returned. Clearly, the width of the frame is always a
multiple of the character width.
See also my package https://github.com/Lindydancer/multicolumn -- I use it
to set up six side-by-side windows. (Note: As this writing, it is not
updated to work-around the above problems.)
Sincerely,
Anders Lindgren (Long time Emacs contributor)
In GNU Emacs 24.4.1 (x86_64-w64-mingw32)
of 2014-10-21 on KAEL
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
`configure --prefix=/z/emacs --host=x86_64-w64-mingw32
--target=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --with-wide-int
--with-jpeg --with-xpm --with-png --with-tiff --with-rsvg --with-xml2
--with-gnutls --with-xft --with-sound=yes --with-file-notification=yes
--without-dbus --without-imagemagick 'CFLAGS=-Ofast
-fomit-frame-pointer -funroll-loops -g0 -pipe' 'CPPFLAGS=-DNDEBUG
-DDBUS_STATIC_BUILD' 'LDFLAGS=-static-libgcc -static-libstdc++ -static
-s -Wl,-s''
Important settings:
value of $LANG: SVE
locale-coding-system: cp1252
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
transient-mark-mode: t
Recent input:
<escape> x r e p o <tab> r <tab> <return>
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...
Load-path shadows:
None found.
Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
help-fns mail-prsvr mail-utils help-mode easymenu time-date tooltip
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32
ls-lisp w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode
register page menu-bar rfn-eshadow timer select scroll-bar mouse
jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
w32notify w32 multi-tty emacs)
Memory information:
((conses 16 75502 7207)
(symbols 56 17532 0)
(miscs 48 78 127)
(strings 32 11014 5137)
(string-bytes 1 283940)
(vectors 16 9121)
(vector-slots 8 376122 15963)
(floats 8 55 70)
(intervals 56 298 0)
(buffers 960 14))
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^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font
2014-10-22 9:03 bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font Anders Lindgren
@ 2014-10-22 13:43 ` martin rudalics
2014-10-22 14:59 ` Eli Zaretskii
[not found] ` <CABr8ebbsGU4y6Se_uKbWJt-oWhrZ0vtXQQvjHdyOTzCE4Ct8nA@mail.gmail.com>
0 siblings, 2 replies; 4+ messages in thread
From: martin rudalics @ 2014-10-22 13:43 UTC (permalink / raw)
To: Anders Lindgren, 18789
> Under MS-Windows, it appears that the width of the frame only can be a
> multiple of the character width. Unfortunately, the width of the fringes
> and scrollbars used by side-by-side windows does not always add up to full
> characters -- if you use a font other than the default. The effect is that
> when using side-by-side windows, you could get a partial column. (Partial
> columns are not desirable, for example, they work differently when you
> place the cursor on the end of a full line.)
In order to obtain pixelwise resizing you have to set
`frame-resize-pixelwise' to a non-nil-value. Please do that.
> Steps to repeat 1:
> emacs -q
>
> Switch to *scratch*: C-x b RET
>
> Evaluate:
> (set-default-font
> (create-fontset-from-ascii-font
> "-raster-Terminal-bold-r-normal-normal-8-60-96-96-c-*-ms-oemlatin"))
>
> Split the window using: C-x 3
>
> Insert a long line: C-u 37 x
>
> Here, the cursor is at the end of the line in the left window, it is
> rendered in the right fringe. (OK)
>
> Go to the other window: C-x o
>
> Place the cursor at the end: C-x >
>
> Here, the cursor is visible in the partially visible column. (NOT OK)
Sorry. Such problems can't be avoided, even without fringes and scroll
bars, when the window size is not a multiple of the size of the default
font. However, you can always calculate your "ideal" frame size based
on the number of side-by-side windows and the widths of the font, the
scroll bars and the fringes. Provided `frame-resize-pixelwise' is
non-nil, `set-frame-width' should then make the frame fit this size.
> Steps to repeat 2:
>
> emacs -q
>
> Evaluate the following:
>
> (set-frame-width (selected-frame) 607 nil t)
> (frame-pixel-width)
>
> Here, 632 is returned.
>
> (set-frame-width (selected-frame) 608 nil t)
> (frame-pixel-width)
>
> Here, 640 is returned. Clearly, the width of the frame is always a
> multiple of the character width.
Here on windows XP doing
(setq frame-resize-pixelwise t)
(set-frame-width (selected-frame) 607 nil t)
(frame-text-width)
yields 607 and
(setq frame-resize-pixelwise t)
(set-frame-width (selected-frame) 608 nil t)
(frame-text-width)
yields 608, as expected.
martin
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font
2014-10-22 13:43 ` martin rudalics
@ 2014-10-22 14:59 ` Eli Zaretskii
[not found] ` <CABr8ebbsGU4y6Se_uKbWJt-oWhrZ0vtXQQvjHdyOTzCE4Ct8nA@mail.gmail.com>
1 sibling, 0 replies; 4+ messages in thread
From: Eli Zaretskii @ 2014-10-22 14:59 UTC (permalink / raw)
To: martin rudalics; +Cc: 18789, andlind
> Date: Wed, 22 Oct 2014 15:43:01 +0200
> From: martin rudalics <rudalics@gmx.at>
>
> > emacs -q
> >
> > Switch to *scratch*: C-x b RET
> >
> > Evaluate:
> > (set-default-font
> > (create-fontset-from-ascii-font
> > "-raster-Terminal-bold-r-normal-normal-8-60-96-96-c-*-ms-oemlatin"))
> >
> > Split the window using: C-x 3
> >
> > Insert a long line: C-u 37 x
> >
> > Here, the cursor is at the end of the line in the left window, it is
> > rendered in the right fringe. (OK)
> >
> > Go to the other window: C-x o
> >
> > Place the cursor at the end: C-x >
> >
> > Here, the cursor is visible in the partially visible column. (NOT OK)
>
> Sorry. Such problems can't be avoided, even without fringes and scroll
> bars, when the window size is not a multiple of the size of the default
> font.
Moreover, the frame size after evaluating the
create-fontset-from-ascii-font form is odd, so "C-x 3" cannot possibly
create 2 windows of the same width. And that is what you see: one
window has one pixel more in its width, so we show the corresponding
part of the cursor. I don't see anything wrong with that.
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font
[not found] ` <CABr8ebbsGU4y6Se_uKbWJt-oWhrZ0vtXQQvjHdyOTzCE4Ct8nA@mail.gmail.com>
@ 2015-01-04 18:10 ` martin rudalics
0 siblings, 0 replies; 4+ messages in thread
From: martin rudalics @ 2015-01-04 18:10 UTC (permalink / raw)
To: Anders Lindgren; +Cc: 18789-done
> In order to obtain pixelwise resizing you have to set
>> `frame-resize-pixelwise' to a non-nil-value. Please do that.
>>
>
> Thanks! That solved my problem!
I've updated the docs for set-frame-size/-height-/width appropriately.
Closing this bug.
Thanks, martin
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-01-04 18:10 UTC | newest]
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-- links below jump to the message on this page --
2014-10-22 9:03 bug#18789: 24.4; Can't resize frame pixelwise on w32, causing partial columns when using non-standard font Anders Lindgren
2014-10-22 13:43 ` martin rudalics
2014-10-22 14:59 ` Eli Zaretskii
[not found] ` <CABr8ebbsGU4y6Se_uKbWJt-oWhrZ0vtXQQvjHdyOTzCE4Ct8nA@mail.gmail.com>
2015-01-04 18:10 ` martin rudalics
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