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From: Hans Hagen <pragma@wxs.nl>
To: Wolfgang Schuster <schuster.wolfgang@googlemail.com>
Cc: Mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: optical centering...
Date: Sat, 17 Dec 2011 10:27:54 +0100	[thread overview]
Message-ID: <4EEC609A.9040500@wxs.nl> (raw)
In-Reply-To: <59DF6886-A501-4936-8B93-DB9FB54F41ED@googlemail.com>

On 16-12-2011 19:26, Wolfgang Schuster wrote:
>
> Am 16.12.2011 um 18:37 schrieb Chris Lott:
>
>> On Fri, Dec 16, 2011 at 8:26 AM, Wolfgang Schuster
>> <schuster.wolfgang@googlemail.com>  wrote:
>>> Centered text based on the longest line is simple but when it’s
>>> better to make this a feature of the lines environment.
>>
>> Yeah, but it *isn't* based on the longest line, but on an average of
>> line length. I guess that's why it is call...well, except for the
>> first example in the doc provided, which is what I think your code
>> does.
>>
>> Though the code you provided is very useful, so thanks!
>
> I showed only it’s not so hard to achieve this feature
> but with a more complex solution where you check
> the width of each line you can use different values
> for the margins.

A teaser for Wolfgang (a few more status dimens in the latest):

\definesystemvariable{zv}

\def\startverse[#1]%
   {\begingroup
    \getparameters[\??zv][\c!align=,#1]%
    \dostartbuffer[versecontent][startverse][stopverse]}

\setvalue{\??zv:\v!flushleft }{\raggedright}
\setvalue{\??zv:\v!flushright}{\raggedleft}
\setvalue{\??zv:\v!left      }{\raggedleft}
\setvalue{\??zv:\v!right     }{\raggedright}
\setvalue{\??zv:\v!middle    }{\raggedcenter}
\setvalue{\??zv:\v!min 
}{\leftskip\the\dimexpr(\textwidth-\framedminwidth)/2\relax}
\setvalue{\??zv:\v!max 
}{\leftskip\the\dimexpr(\textwidth-\framedmaxwidth)/2\relax}
\setvalue{\??zv:\v!medium 
}{\leftskip\the\dimexpr(\textwidth-\framedaveragewidth)/2\relax}

\def\stopverse
   {\setbox\scratchbox\hbox\bgroup\framed[width=fit,align=right]\bgroup
      \startlines
      \getbuffer[versecontent]
      \stoplines
    \egroup\egroup
    \getvalue{\??zv:\@@zvalign}%
    \startlines
    \getbuffer[versecontent]
    \stoplines
    \endgroup}

% \protect

\starttext \showframe

\startverse[align=flushleft]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\startverse[align=flushright]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\startverse[align=middle]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\startverse[align=min]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\startverse[align=max]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\startverse[align=medium]
ASM rządzi
dioda świeci miodowo
chrząszcz chrzęści w czcionkach.
\stopverse

\stoptext

I'll think about a pluggable special line alignment in th emain text 
stream (would be multipass).

Hans


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      reply	other threads:[~2011-12-17  9:27 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-16  1:31 Chris Lott
2011-12-16  5:22 ` Wolfgang Schuster
2011-12-16  7:11   ` Chris Lott
2011-12-16  9:00     ` Hans Hagen
2011-12-16 16:53       ` Chris Lott
2011-12-16 17:26         ` Wolfgang Schuster
2011-12-16 17:37           ` Chris Lott
2011-12-16 18:26             ` Wolfgang Schuster
2011-12-17  9:27               ` Hans Hagen [this message]

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