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%D \module
%D [ file=s-pre-07,
%D version=1999.08.20,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Environment 7,
%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.
%D This style was made for the \NTS\ presentation at
%D \EUROTEX\ 1999. It's a wink to programming in a webbed way.
%D This is just one way of implementing such a style. Today
%D we have more \METAPOST\ interfacing available, and
%D thereby moore tools and alternative ways to reach such a
%D goal. I must admit that the main macro looks fuzzy. On
%D the other hand, the presentation can look quite structured.
%D
%D \starttyping
%D \Topics{...}
%D
%D \StartIdeas
%D \Topic{...}
%D \StartIdea ... \StopIdea
%D \StartIdea ... \StopIdea
%D \StopIdeas
%D \stoptyping
\startmode[asintended] \setupbodyfont[lbr] \stopmode
\setupbodyfont[14.4pt]
\usemodule
[abr-02]
\setuppapersize
[S6][S6]
\setuplayout
[topspace=0cm,
backspace=0cm,
header=0pt,
footer=0pt,
width=middle,
height=middle]
\setupinteractionscreen
[option=max]
%D In order to prevent loops due to random placement, we
%D keep the random seed reasonable constant.
\setupsystem
[random=big]
\setupcolors
[state=start]
\definecolor[gray] [s=.4]
\definecolor[lightgray][s=.9]
\definecolor[red] [r=.4] \definecolor[cyan] [g=.4,b=.4]
\definecolor[green][g=.4] \definecolor[magenta][r=.4,b=.4]
\definecolor[blue] [b=.4] \definecolor[yellow] [r=.4,g=.4]
\definecolor[PageColor][gray]
\definecolor[TextColor][lightgray]
\definecolor[LineColor][yellow]
\definecolor[linecolor 1][red] \definecolor[linecolor 5][cyan]
\definecolor[linecolor 2][green] \definecolor[linecolor 6][magenta]
\definecolor[linecolor 3][blue] \definecolor[linecolor 4][yellow]
\setupinteraction
[state=start,
display=new,
color=LineColor,
contrastcolor=LineColor]
\startuseMPgraphic{shape}
path p ; color c, w ; numeric width, height ;
c := \MPcolor{LineColor} ; w := \MPcolor{TextColor} ;
width := \overlaywidth ; height := \overlayheight ;
pickup pencircle scaled .5cm ;
p := unitcircle
xscaled \MPw{\Idea} yscaled \MPh{\Idea}
shifted \MPxy{\Idea} ;
for z = (0,.5height), (width,.5height), (.5width,0), (.5width,height),
(0,0), (width,height), (0,height), (width,0) :
draw center p -- z withcolor c ;
endfor ;
fill p withcolor w ;
draw p withcolor c ;
p := unitcircle
xscaled \MPw{\Page} yscaled \MPh{\Page}
shifted \MPxy{\Page} ;
pickup pencircle scaled .25cm ;
fill p withcolor w ;
draw p withcolor c ;
draw unitsquare xscaled width yscaled height withcolor c ;
\stopuseMPgraphic
\defineoverlay [shape] [\useMPgraphic{shape}]
\defineoverlay [nextpage] [\overlaybutton{nextpage}]
\defineoverlay [previouspage] [\overlaybutton{previouspage}]
\defineoverlay [content] [\overlaybutton{content}]
\defineoverlay [forward] [\overlaybutton{forward}]
\setupbackgrounds
[page]
[background={color,previouspage,shape},
backgroundcolor=PageColor]
\def\StartIdea%
{\xdef\Idea{idea:\realfolio}
\xdef\Page{page:\realfolio}
\startstandardmakeup
\dontcomplain
\vbox to \makeupheight \bgroup
\getrandomdimen\scratchdimen{75pt}{600pt}\vskip 0pt plus \scratchdimen
\hbox to \makeupwidth \bgroup
\getrandomdimen\scratchdimen{75pt}{600pt}\hskip 0pt plus \scratchdimen
\hpos{idea:\realfolio} \bgroup
\framed
[width=.6\hsize,height=fit,offset=2cm,align=middle,
frame=off,strut=no,background=forward]
\bgroup
\setupwhitespace[big]}
\def\StopIdea%
{\egroup
\egroup
\getrandomdimen\scratchdimen{75pt}{600pt}\hskip 0pt plus \scratchdimen
\egroup
\getrandomdimen\scratchdimen{75pt}{600pt}\vskip 0pt plus \scratchdimen
\egroup
\ifx\CurrentTopic\empty \else
\vskip-\makeupheight
\vbox to \makeupheight
{\vfill
\ifx\CurrentListTopic\empty\else
\writetolist[Topic]{}{\CurrentListTopic}
\fi
\hbox to \makeupwidth
{\hfill
\hpos{page:\realfolio}
{\framed
[offset=.5cm,frame=off,background=content]
{\bf\ignorespaces\CurrentTopic\unskip}}%
\hskip.5cm}
\vskip.5cm}
\fi
\stopstandardmakeup
\let\CurrentListTopic\empty}
\definelist
[Topic]
\setuplist
[Topic]
[alternative=f,
expansion=command]
\let\CurrentTopic\empty
\let\CurrentListTopic\empty
\long\def\StartTopic#1\StopTopic
{\long\def\CurrentTopic{#1}
\let\CurrentListTopic\CurrentTopic}
\def\Topic#1%
{\StartTopic#1\StopTopic}
\def\Topics#1%
{\StartIdeas
\def\CurrentTopic{#1}
\StartIdea
\pagereference[content]
\placelist[Topic][criterium=all]
\StopIdea
\StopIdeas}
\newcounter\CurrentIdeas
\def\StartIdeas%
{\ifnum\CurrentIdeas=6 \doglobal\newcounter\CurrentIdeas \fi
\doglobal\increment\CurrentIdeas
\definecolor[LineColor][linecolor \CurrentIdeas]}
\def\StopIdeas%
{}
\doifnotmode{demo}{\endinput}
%D The (rather silly) demo section.
\starttext
\Topics{This is about \unknown}
\StartIdeas
\Topic{Some topic}
\StartIdea An idea \unknown \StopIdea
\StartIdea \unknown\ and another \StopIdea
\StopIdeas
\stoptext
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