From: Brahimi Saifullah <brahimi.saifullah@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 51995@debbugs.gnu.org
Subject: bug#51995: 29.0.50; `string-pixel-width' depends on the current window width
Date: Sat, 20 Nov 2021 18:36:46 -0300 [thread overview]
Message-ID: <84ilwm7bm9.fsf@gmail.com> (raw)
In-Reply-To: <84czmvbepd.fsf@gmail.com>
>What is the actual real-life situation where
>this is needed?
Mainly when a window with delicated alignment is resized.
Indeed, in most situations it likely won't be an issue,
but I can think of times when it most definitely will:
For example, in the package I'm working on,
I want certain text to always be centered,
even if the user resizes the window.
(By centered I mean having the same amount of space on both sides).
This is a mockup of the code I use:
(let* ((string "Hello World, Hello World, Hello world")
(width (string-pixel-width string)))
(insert
(propertize " "
'display
`(space :align-to (- center (,(/ width 2)))))
string))
If you evaluate this code in a window that is bigger or equal
to the size of the string, it will be properly aligned even if
you resize it later. But if you evaluate it in a small window,
it will be grossly misaligned when you increase the window size.
next prev parent reply other threads:[~2021-11-20 21:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-20 5:04 bug#51995: 29.0.50; `string-pixel-width' depends on the current window width Brahimi Saifullah
2021-11-20 7:20 ` Eli Zaretskii
2021-11-20 8:48 ` martin rudalics
2021-11-20 9:35 ` Lars Ingebrigtsen
2021-11-20 21:36 ` Brahimi Saifullah [this message]
2021-11-20 21:42 ` Brahimi Saifullah
2021-11-21 6:34 ` Eli Zaretskii
2021-11-21 9:12 ` martin rudalics
2021-11-21 18:38 ` Brahimi Saifullah
2021-11-22 9:28 ` martin rudalics
2021-11-22 11:04 ` Lars Ingebrigtsen
2021-11-22 0:53 ` Brahimi Saifullah
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