%D \module
%D   [      file=s-present-overlap, % was s-pre-62,
%D        version=2005.03.04,
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Environment Overlap,
%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.

\usemodule[present-stepwise]

\startmodule[present-overlap]

\doifmodeelse {atpragma} {

    \usetypescriptfile
      [type-ghz]

    \definetypeface[mainface][rm][serif][melior]  [default][encoding=texnansi]
    \definetypeface[mainface][tt][mono] [modern]  [default][encoding=texnansi,rscale=1.05]
    \definetypeface[mainface][ss][serif][melior]  [default][encoding=texnansi]
    \definetypeface[mainface][mm][math] [palatino][default][encoding=texnansi,rscale=0.95]

    \setupbodyfont
      [mainface,14.4pt]

} {

    \setupbodyfont[dejavu,14.4pt]

}

\setuppapersize
  [S6][S6]

\setvariables[layout][dx=0,dy=1,nx=2,ny=2,step=64]

\definemeasure[layoutwd][\dimexpr\paperwidth /\getvariable{layout}{step}\relax]
\definemeasure[layoutht][\dimexpr\paperheight/\getvariable{layout}{step}\relax]

\setuplayout
  [      width=middle,
        height=middle,
        header=0pt,
        footer=0pt,
        margin=0pt,
     backspace=5\measured{layoutwd},
      topspace=5\measured{layoutht}]

\definelayout
  [step]
  [  backspace=\numexpr2+                         \getvariable{layout}{dx}\relax\measured{layoutwd},
      cutspace=\numexpr3+\getvariable{layout}{nx}-\getvariable{layout}{dx}\relax\measured{layoutwd},
      topspace=\numexpr2+                         \getvariable{layout}{dy}\relax\measured{layoutht},
   bottomspace=\numexpr3+\getvariable{layout}{ny}-\getvariable{layout}{dy}\relax\measured{layoutht}]

\definecolor[layout:left]  [t=.5,a=1,b=1]
\definecolor[layout:right] [t=.5,a=1,r=1]
\definecolor[layout:top]   [t=.5,a=1,g=1]
\definecolor[layout:bottom][t=.5,a=1,y=1]
\definecolor[layout:page]  [s=.75]

\definehspace[menu][\measured{layoutwd}]

\setupinteraction
  [state=start,
   click=off,
   style=,
   color=interactioncolor,
   contrastcolor=interactioncolor]

\setupinteractionscreen
  [option=max]

\setupbuttons
  [color=maincolor,
   contrastcolor=maincolor,
   style=\tf, % acceptable
   height=2\measure{layoutht},
   width=2\measure{layoutwd},
   offset=overlay,
   frame=off]

\definecolor[interactioncolor][darkgray]
\definecolor[maincolor]       [lightgray]

\setuptexttexts
  []
  [\vbox to \textheight{\vfill\hfill\setups{menu:content}}]

\startsetups menu:content

    \button{\symbol[firstpage]}[firstpage]
    \hspace[menu]
    \button{\symbol[previouspage]}[previouspage]
    \hspace[menu]
    \button{\StartBusy\symbol[PauseRendering]\StopBusy}[InvokeStepper]
    \hspace[menu]
    \button{\symbol[nextpage]}[nextpage]
    \hspace[menu]
    \button{\symbol[lastpage]}[lastpage]
    \hspace[menu]
    \button{\symbol[CloseDocument]}[CloseDocument]

\stopsetups

\startuseMPgraphic{page}{step}
    StartPage ;
        numeric dx ; dx := PaperWidth /\MPvar{step} ;
        numeric dy ; dy := PaperHeight/\MPvar{step} ;
        fill Page withcolor .5white ;
        fill
            ulcorner Page -- urcorner Page --
            urcorner Page shifted (0,-TopSpace+dy) -- ulcorner Page shifted (0,-TopSpace+dy) -- cycle
            withcolor "layout:top" ;
        fill
            llcorner Page -- lrcorner Page --
            lrcorner Page shifted (0,BottomSpace-dy) -- llcorner Page shifted (0,BottomSpace-dy) -- cycle
            withcolor "layout:bottom" ;
        fill
            ulcorner Page -- llcorner Page --
            llcorner Page shifted (BackSpace-dx,0) -- ulcorner Page shifted (BackSpace-dx,0) -- cycle
            withcolor "layout:left" ;
        fill
            urcorner Page -- lrcorner Page --
            lrcorner Page shifted (-CutSpace+dx,0) -- urcorner Page shifted (-CutSpace+dx,0) -- cycle
            withcolor "layout:right" ;
        fill Field[Text][Text] enlarged (dx,dy) withcolor white ;
        fill Field[Text][Text] enlarged (dx,dy) withcolor "layout:page" ;
    StopPage ;
\stopuseMPgraphic

\defineoverlay[page][\useMPgraphic{page}{step=\getvariable{layout}{step}}]

\setupbackgrounds
  [page]
  [background=page]

\setupcolors
  [state=start]

\startsetups nextstep
  % pagebreak handlers are grouped, so we need to set global
  \ifnum\getvariable{layout}{dx}=\getvariable{layout}{nx}\relax
    \ifnum\getvariable{layout}{dy}=\getvariable{layout}{ny}\relax
      \setxvariables[layout][dy=1]
    \else
      \setxvariables[layout][dy=\the\numexpr\getvariable{layout}{dy}+1\relax]
    \fi
    \setxvariables[layout][dx=1]
  \else
    \setxvariables[layout][dx=\the\numexpr\getvariable{layout}{dx}+1\relax]
  \fi
  % global anyway
  \setuplayout[step]
\stopsetups

\appendtoks
    \definefont[ChapterTitleFont][SerifBold*default sa 2]
    \NormalizeFontHeight \SubTitleFont      {\setstrut\strut\quad} {3\lineheight} {SerifBold*default}
    \NormalizeFontHeight \ChapterNumberFont {XVI}                  {4\lineheight} {SerifBold*default}
\to \everystarttext

\setupsection
  [section-2]
  [bodypartconversion=Romannumerals]

\installpagebreakhandler {step} {\setups{nextstep}}

\definepagebreak[chapter][yes,step]

\setuphead
  [chapter]
  [page=chapter,
   command=\MyChapterCommand,
   after=\nowhitespace]

\definehead[Topic][chapter]
\definehead[Nopic][title]

\setuphead[chapter,Topic,Nopic]
  [numberstyle=\ChapterNumberFont,
   textstyle=\ChapterTitleFont,
   numbercolor=lightgray,
   textcolor=darkgray]

\unexpanded\def\MyChapterCommand#1#2%
  {\hbox \bgroup % we need to nil the strut added by the headplacement
     \setupframed[frame=off,lines=3,offset=overlay]%
     \rlap{\hskip2\lineheight\framed{\setnostrut#1}}%
     \framed{#2}%
   \egroup}

\setupitemize
  [each]
  [R,broad]
  [stopper=,
   color=lightgray]

\startsetups document:start

    \startstandardmakeup[headerstate=high,textstate=stop]

        \setupalign[middle]

        \vfil
        \startcolor[darkgray]
            \dontleavehmode\scale[width=.9\textwidth]{\bf\setstrut\strut\documentvariable{title}}
            \vfil
            \dontleavehmode\scale[width=.7\textwidth]{\bf\setstrut\strut\documentvariable{subtitle}}
            \vfil \vfil \vfil
            \dontleavehmode\scale[width=.5\textwidth]{\bf\setstrut\strut\documentvariable{location}}
        \stopcolor
        \vfil \vfil \vfil

    \stopstandardmakeup

\stopsetups

\stopmodule

\continueifinputfile{s-present-overlap.mkiv}

\usemodule[present-common]

\inputpresentationfile{context/2011/context-2011-mathml-update.tex}
%\inputpresentationfile{context/2011/context-2011-metapost-how-we-adapt.tex}
%\inputpresentationfile{context/2011/context-2011-ebook-export.tex}
%\inputpresentationfile{context/2011/context-2011-sorting-registers.tex}