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.
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
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`configure --prefix=/z/emacs --host=x86_64-w64-mingw32
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-fomit-frame-pointer -funroll-loops -g0 -pipe' 'CPPFLAGS=-DNDEBUG
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