From: "Drew Adams" <drew.adams@oracle.com>
To: "'Andy Stewart'" <lazycat.manatee@gmail.com>
Cc: help-gnu-emacs@gnu.org
Subject: RE: How to draw pixel ?
Date: Wed, 11 Feb 2009 09:03:57 -0800 [thread overview]
Message-ID: <001c01c98c6a$c7d532f0$c2b22382@us.oracle.com> (raw)
In-Reply-To: <878wocoqvn.fsf@debian.domain>
> >> function to draw pixel vertically line in emacs buffer
> >
> > I don't have a direct answer to your question, but you
> > might also take a look at the code in vline.el. It draws
> > a vertical line using character composition with
> > the character ?|.
> > http://www.emacswiki.org/emacs/vline.el
>
> I know vline.el.
> But this overlay have display problem with multi-byte
> language (such as Chinese), when Chinese character's width
> is not *two times* of English character's width.
>
> I have attached screenshot for describe this problem.
> Then you will see the problem.
I probably can't help with this - I'm no expert on multi-byte stuff, character
composition, or use of graphics with Emacs.
But make sure of one thing: did you first set option `vline-style' to `compose'?
If it is not `compose', then a face is simply applied to the existing character.
If it is `compose', then the existing character is composed with character ?|.
The latter effect is of drawing a thin vertical line through the character.
Your screenshot looks like what one gets when the option has value `face'
instead. (But maybe that's just a coincidence, and the appearance is due here to
multi-byte characters.)
prev parent reply other threads:[~2009-02-11 17:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-11 16:16 How to draw pixel ? Andy Stewart
2009-02-11 16:43 ` Drew Adams
2009-02-11 16:59 ` Andy Stewart
[not found] ` <878wocoqvn.fsf@debian.domain>
2009-02-11 17:03 ` Drew Adams [this message]
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