%D \module
%D   [      file=s-pre-20,
%D        version=2000.08.07,
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Environment 20,
%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.

\setupbodyfont
  [lbr,14.4pt]

\setuppapersize
  [S6][S6]

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

\setupcolors
  [state=start]

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

\setupinteractionscreen
  [option=max]

\setupsystem
  [random=big] % once per hour

\startreusableMPgraphic{page}
  StartPage ;
    filldraw Page withcolor \MPcolor{PageColor} ;
    pickup pencircle scaled (.25cm+uniformdeviate.25cm) ;
    for i=1 upto 200 :
      drawdot
       (uniformdeviate PaperWidth,uniformdeviate PaperHeight)
       withcolor \MPcolor {LineColor} ;
    endfor ;
  StopPage ;
\stopreusableMPgraphic

\startuseMPgraphic{idea}
  StartPage ;
    path p ;
    p := unitsquare xyscaled(\MPw{idea:\realfolio},\MPh{idea:\realfolio}) superellipsed .90 ;
    p := p shifted \MPxy{idea:\realfolio} ;
    draw p withpen pencircle scaled .500cm withcolor \MPcolor{PageColor} ;
    fill p                                 withcolor \MPcolor{\overlaycolor} ;
    draw p withpen pencircle scaled .250cm withcolor \MPcolor{LineColor} ;
    p := unitsquare xyscaled(\MPw{title:\realfolio},\MPh{title:\realfolio}) superellipsed .90 ;
    p := p shifted \MPxy{title:\realfolio} ;
    draw p withpen pencircle scaled .250cm withcolor \MPcolor{PageColor} ;
    fill p                                 withcolor \MPcolor{\overlaycolor} ;
    draw p withpen pencircle scaled .125cm withcolor \MPcolor{LineColor} ;
  StopPage ;
\stopuseMPgraphic

\definecolor[PageColor][s=.50]
\definecolor[TextColor][s=.80]
\definecolor[DoneColor][s=.65]
\definecolor[LineColor][r=.7,g=.6,b=.5]

\defineoverlay [idea] [\useMPgraphic  {idea}]
\defineoverlay [page] [\reuseMPgraphic{page}]

\setupbackgrounds
  [page]
  [background={page,forward}]

\defineoverlay[forward][\overlaybutton{forward}]

% alternatief: buffer en ander regime, zodat lokale kleuren
% kunnen worden genilled. Pos gebruiken om te positioneren.

\definereference[thispage][page(\realfolio)]

\newbox\firstideabox  \setbox\firstideabox =\null
\newbox\secondideabox \setbox\secondideabox=\null
\newbox\thirdideabox  \setbox\thirdideabox =\null

\def\StartTopic% bottom title, top title
  {\dodoublegroupempty\doStartTopic}

\def\doStartTopic#1#2% the positions end up at each page -)
  {\setbox\firstideabox=
     \vbox to \makeupheight
       \bgroup
         \getrandomdimen\scratchdimen{.5cm}\makeupheight
         \vskip 0cm plus \scratchdimen
         \hbox to \makeupwidth
           \bgroup
             \getrandomdimen\scratchdimen{.5cm}\makeupwidth
             \hskip 0cm plus \scratchdimen
             \setbox\scratchbox=\hbox\bgroup\hpos{idea:\realfolio}
               \bgroup
                 \getrandomdimen\hsize{.5\makeupwidth}{.7\makeupwidth}%
                 \framed
                   [offset=3ex,align=middle,strut=no,frame=off,
                    before=,after=]
                   \bgroup
                     \setupwhitespace[big]%
                     \doifsomething{#2}{\Title{#2}}%
                     \def\StopTopic{%
                   \egroup
               \egroup
             \egroup
             \gotobox{\box\scratchbox}[thispage]%
             \getrandomdimen\scratchdimen{.5cm}\makeupwidth
             \hskip 0cm plus \scratchdimen
           \egroup
         \getrandomdimen\scratchdimen{.5cm}\makeupheight
         \vskip 0cm plus \scratchdimen
         \hbox to \makeupwidth
           \bgroup
             \hfill
             \hpos{title:\realfolio}
               {\button[offset=1.5ex,frame=off]{#1}[backward]}%
             \getrandomdimen\scratchdimen{.5cm}{2.5cm}%
             \hskip \scratchdimen
           \egroup
         \getrandomdimen\scratchdimen{.5cm}{1.5cm}
         \vskip \scratchdimen
       \egroup
   \setbox\secondideabox=\vbox
     {\framed
        [offset=overlay,frame=off,background=idea,backgroundcolor=TextColor]
        {\copy\firstideabox}}
   \setbox\firstideabox=\vbox
     {\framed
        [offset=overlay,frame=off,background=idea,backgroundcolor=DoneColor]
        {\LineColor\copy\firstideabox}}
   \startstandardmakeup
     \startoverlay
       {\copy\thirdideabox }
       {\copy\secondideabox}
     \stopoverlay
   \stopstandardmakeup
   \setbox\thirdideabox=\vbox
     {\startoverlay
        {\copy\thirdideabox }
        {\copy\firstideabox}
      \stopoverlay}}}

\long\def\TitlePage#1#2%
  {\bgroup
   \switchtobodyfont[32pt]
   \StartTopic{#1}#2\StopTopic
   \egroup}

\def\Title#1{\midaligned{\bfb#1}\blank}

\doifnotmode{demo}{\endinput}

% \usemodule[pre-super] % super ellipse as well as superpositioned

\starttext

\TitlePage{August 2000}{Something Very Important}

\StartTopic{Alpha}
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
\StopTopic

\StartTopic{Beta and Gamma}
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
\StopTopic

\StartTopic{Delta}
  A simple and not too long text just to show the idea.
\StopTopic

\StartTopic{Epsilon}
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
\StopTopic

\StartTopic{Zeta, Eta and Theta}
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
\StopTopic

\StartTopic{Omega}
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
  A simple and not too long text just to show the idea.
\StopTopic

\stoptext