From: no-spam@cua.dk (Kim F. Storm)
To: "Jonas Bernoulli" <jonas@bernoulli.cc>
Cc: help-gnu-emacs@gnu.org
Subject: Re: draw line
Date: Thu, 20 Mar 2008 17:20:57 +0100 [thread overview]
Message-ID: <87myotwemu.fsf@kfs-lx.rd.rdm> (raw)
In-Reply-To: <201bac3a0803191400g2dfed3e1kf40180ac098ccf41@mail.gmail.com> (Jonas Bernoulli's message of "Wed\, 19 Mar 2008 22\:00\:00 +0100")
"Jonas Bernoulli" <jonas@bernoulli.cc> writes:
> I would like to draw a one-pixel line. I have tried quite a few things
> by now but none of them works.
>
> Here are two ways I have tried. Evaluating them should draw a red line
> on the next line, which is only one pixel high.
>
> (insert (concat "\n" (propertize "\n" 'face '(:background "red")
> 'display '(space :height (1)))))
>
> (insert (concat "\n" (propertize "\n" 'face '(:background "red")
> 'line-height 1)))
>
> This doesn't sound very promissing:
>
> 38.11 Line Height
> ... However, no matter what you specify, the actual line height can
> never be less than the default. ...
Does this help?
A newline can have a `line-height' text or overlay property that
controls the total height of the display line ending in that newline.
If the property value is `t', the newline character has no effect on
the displayed height of the line--the visible contents alone determine
the height. This is useful for tiling small images (or image slices)
without adding blank areas between the images.
--
Kim F. Storm http://www.cua.dk
next prev parent reply other threads:[~2008-03-20 16:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-19 21:00 draw line Jonas Bernoulli
2008-03-20 7:19 ` David Hansen
2008-03-20 16:20 ` Kim F. Storm [this message]
[not found] <mailman.9244.1205978497.18990.help-gnu-emacs@gnu.org>
2008-03-20 9:29 ` Johan Bockgård
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