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From: Marco Patzer <homerow@lavabit.com>
To: ntg-context@ntg.nl
Subject: Re: text overlayed
Date: Mon, 4 Mar 2013 12:37:58 +0100	[thread overview]
Message-ID: <20130304113758.GN29684@homerow> (raw)
In-Reply-To: <loom.20130304T114454-503@post.gmane.org>


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On 2013–03–04 Roland Thiers wrote:

> I'm learning a little bit of metapost language, using metafun manual.
> I made some background for a title (surely the code is awful, thanks 
> for suggestions of improvement) but it's static, i'd like to adapt it to 
> the widthof the text. I don't know if it is possible from my code 
> and if it is i don't know how to do !

You can use the variable OverlayWidth to obtain the width of the
overlay, which is determined by the provided text. You can use it as
follows:

\setuplayout
  [backspace=6cm]

\startuniqueMPgraphic{essai}
  path p,p',q,q';

  w:=2OverlayWidth;

  p := (0,0.1cm)     -- (w,0.3cm);
  q := (11cm,-0.7cm) -- (w,2.2cm);
  p':= (w,1.3cm)     -- (-0.4cm,1.4cm);
  q':= (0.3cm,2.4cm) -- (0.2cm,-0.3cm);

  pickup pencircle scaled 1mm;
  drawoptions(withcolor 0.3white);

  draw p; draw p';
  draw q; draw q';

  pair A; A:=q'intersectionpoint p';
  pair B; B:=q intersectionpoint p';
  pair C; C:=p intersectionpoint q;
  pair D; D:=q'intersectionpoint p;
  path s; s:= A--B--C--D--cycle;

  fill s withcolor .8white;
\stopuniqueMPgraphic

\defineoverlay
  [encadrement]
  [\uniqueMPgraphic{essai}]

\defineframed
  [boxframed]
  [frame=off,
   foregroundstyle=bolditalic,
   foregroundcolor=darkred,
   background=encadrement]

\starttext
  \boxframed{Devoir de mathématiques}
  \blank [2cm]
  \boxframed{Devoir de mathématiques and some more text}
\stoptext


Marco

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  reply	other threads:[~2013-03-04 11:37 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-04 11:02 Roland Thiers
2013-03-04 11:37 ` Marco Patzer [this message]
2013-03-04 13:30   ` Roland Thiers

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