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%D \module
%D   [      file=s-pre-11,
%D        version=1999.08.20,
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Environment 11,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\setuppapersize
  [S6][S6]

\setuplayout
  [topspace=0cm,
   backspace=0cm,
   header=0pt,
   footer=0pt,
   width=middle,
   height=middle]

\setupbodyfont
  [14.4pt,lbr]

\setupcolors
  [state=start]

\setupinteraction
  [click=no,
   display=new,
   state=start]

\setupinteractionscreen
  [option=max]

\unexpanded\def\SomeShape
  {\resetMPdrawing
   \startMPdrawing
     path p[], q[] ; pair a, b ;
     StartPage ;
   \stopMPdrawing
   \dorecurse{\CurrentTopic}
     {\startMPdrawing
        initialize_box(\MPpos{topic-\realfolio-\recurselevel}) ;
        p[\recurselevel] := tensecircle (wxy,hxy,.25cm) shifted cxy ;
        fill p[\recurselevel] withcolor .9white  ;
        pickup pencircle scaled .25cm ;
        if \recurselevel = \CurrentTopic :
          draw p[\recurselevel] withcolor \MPcolor{ShowColor} ;
        else :
          draw p[\recurselevel] withcolor \MPcolor{DoneColor} ;
        fi ;
      \stopMPdrawing}%
   \dorecurse{\CurrentMaxItem}
     {\startMPdrawing
        initialize_box(\MPpos{item-\realfolio-\recurselevel}) ;
        linewidth := .25cm ;
        q[\recurselevel] := tensecircle (wxy,hxy,linewidth) shifted cxy ;
        fill q[\recurselevel] withcolor .9white  ;
        pickup pencircle scaled linewidth ;
        if \recurselevel = \CurrentMaxItem :
          draw q[\recurselevel] withcolor \MPcolor{ShowColor} ;
        else :
          draw q[\recurselevel] withcolor \MPcolor{DoneColor} ;
        fi ;
      \stopMPdrawing}%
   \dostepwiserecurse{2}{\CurrentTopic}{1}
     {\startMPdrawing
        draw
          rt  point 3 of p[\recurselevel-1] --
          lft point 7 of p[\recurselevel]
          withcolor \MPcolor{ArrowColor} ;
      \stopMPdrawing}%
   \dostepwiserecurse{2}{\CurrentMaxItem}{1}
     {\startMPdrawing
        draw
          bot point 9 of q[\recurselevel-1] --
          top point 5 of q[\recurselevel]
          withcolor \MPcolor{ArrowColor} ;
      \stopMPdrawing}%
   \startMPdrawing
     draw Page
       withpen pencircle scaled .5cm
       withcolor \MPcolor{EdgeColor} ;
     StopPage ;
   \stopMPdrawing
   \MPdrawingdonetrue
   \getMPdrawing}

\unexpanded\def\TitlePage#1%
  {\startstandardmakeup
     \setupalign[middle]
     \def\\{\vfil\bfb\setupinterlinespace}
     \bfd\setupinterlinespace
     \vfil#1\vfil\vfil
   \stopstandardmakeup}

\definecolor[PageColor][r=.5,g=.4,b=.3]
\definecolor[LineColor][r=.7,g=.6,b=.5]

\definecolor[PageColor]  [s=.60]
\definecolor[ShowColor]  [r=.40]
\definecolor[EdgeColor]  [g=.40]
\definecolor[DoneColor]  [r=.40,g=.40]
\definecolor[ArrowColor] [b=.40]
\definecolor[LineColor]  [r=.60,g=.60]
\definecolor[GotoColor]  [ArrowColor]

\setupinteraction[color=GotoColor,contrastcolor=GotoColor]

\defineoverlay [shape] [\SomeShape]
\defineoverlay [next]  [\overlaybutton{forward}] % [{nextpage}]

\setupbackgrounds
  [page]
  [background={color,next,shape},
   backgroundcolor=PageColor]

\doglobal\newcounter\CurrentMaxItem
\doglobal\newcounter\CurrentItem
\doglobal\newcounter\CurrentTopic

\unexpanded\def\StartIdea
  {\doglobal\newcounter\CurrentItem}

\unexpanded\def\StartTopic
  {\doglobal\increment\CurrentTopic
   \dostartbuffer[topic-\CurrentTopic][StartTopic][StopTopic]}

\unexpanded\def\StopIdea
  {\dorecurse{\CurrentItem}
     {\let\CurrentMaxItem\recurselevel
      \doStopIdea}}

\unexpanded\def\doStopIdea
  {\startstandardmakeup
   \dontcomplain
   \vskip.875cm
   \hbox to \makeupwidth
     {\hfill
      \dorecurse{\CurrentTopic}
        {\edef\Topic{topic-\realfolio-\recurselevel}%
         \hpos
           {\Topic}
           {\framed
              [frame=off,align=middle,offset=.25cm]
              {\getbuffer[topic-\recurselevel]}}%
         \ifnum\recurselevel<\CurrentTopic
           \hskip.875cm
         \fi}%
      \hfill}
   \vskip.875cm
   \vfilll
   \dorecurse{\CurrentMaxItem}
     {\edef\Item{item-\realfolio-\recurselevel}
      \hbox to \makeupwidth
        {\hfill
         \hpos
           {\Item}
           {\framed
              [width=.75\makeupwidth,
               frame=off,
               align=middle,offset=.125cm]
              {\getbuffer[item-\recurselevel]}}%
          \hfill}
      \vskip.875cm}
   \vfilll
   \stopstandardmakeup}

\unexpanded\def\StartItem
  {\doglobal\increment\CurrentItem
   \dostartbuffer[item-\CurrentItem][StartItem][StopItem]}

\lefthyphenmin =\maxdimen
\righthyphenmin=\maxdimen

% \doifnotmode{demo}{\endinput}

\starttext

\StartIdea
  \StartTopic
     A Nice Idea
  \StopTopic
  \StartItem
    \input reich \relax
  \StopItem
  \StartItem
    \input reich \relax
  \StopItem
  \StartItem
    \input reich \relax
  \StopItem
\StopIdea

\StartIdea
  \StartTopic
     One More Nice Idea
  \StopTopic
  \StartItem
    \input reich \relax
  \StopItem
  \StartItem
    \input reich \relax
  \StopItem
\StopIdea

\StartIdea
  \StartTopic
     The Last Idea
  \StopTopic
  \StartItem
    \input tufte \relax
  \StopItem
\StopIdea

\stoptext