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%D \module
%D [ file=s-pre-04,
%D version=1998.09.06,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Environment 4,
%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[pre-general]
%D \macros
%D {setupbodyfont}
%D
%D This is just another environment for typesetting interactive
%D presentations. I wrote this module on behalf of a course I
%D gave for the United Kingdom \TeX\ users group.
\setupbodyfont[ams,pos,14.4pt]
%D \macros
%D {setupcolors,definecolor}
%D
%D I started using dark blue for the navigational elements. In
%D that context, dark red is a logical choice for the contrast
%D color. While playing around with the navigational elements
%D I decided to use the not so dominant color yellow for the
%D status bar.
%D
%D A few days before I wrote this style, the recent acquisition
%D of Mondriaans last painting by the Dutch governement was a
%D hot topic in the dutch news scenary. Therefore I decided to
%D replace the rather dull title page by something more
%D colorful, in mondriaan colors, but far more random than any
%D of his paintings. For consistence we remap the already
%D defined primary colors.
\setupcolors [state=start]
\definecolor [NoneColor] [s=.6]
\definecolor [GotoColor] [b=.6] \definecolor[blue] [GotoColor]
\definecolor [ExitColor] [r=.6] \definecolor[red] [ExitColor]
\definecolor [JumpColor] [s=.6]
\definecolor [UserColor] [g=.6] \definecolor[green] [UserColor]
\definecolor [StepColor] [r=.6,g=.6] \definecolor[yellow][StepColor]
\definecolor [PageColor] [s=.80] \definecolor[gray] [PageColor]
\definecolor [TextColor] [s=.90]
%D \macros
%D {setuppapersize}
%D
%D As usual, we take a screen oriented paper size:
\setuppapersize
[S6][S6]
%D \macros
%D {setuplayout,setupinteractionscreen}
%D
%D The layout definition fits into this $600\times450$ point
%D area, but the dimensions are somewhat diffused by the text
%D background offset.
\setuplayout
[width=530pt,
height=400pt,
header=0pt,
footer=0pt,
backspace=15pt,
topspace=15pt,
bottomdistance=15pt,
bottom=10pt,
margin=0pt,
rightedgedistance=15pt,
rightedge=30pt]
\setupinteractionscreen
[option=max]
%D \macros
%D {setupbackgrounds}
%D
%D Both the page and the text area have a gray background.
%D The \type {[text,text]} area also has an offset. Later we
%D will see that we have to compensate for that in the
%D navigational areas.
\setupbackgrounds
[page]
[background=color,
backgroundcolor=PageColor]
\setupbackgrounds
[text][text]
[background=color,
backgroundcolor=TextColor,
backgroundoffset=5pt]
%D \macros
%D {setupinteraction}
%D
%D For convenient navigation, we turn on interaction.
\setupinteraction
[state=start,
menu=on,
color=UserColor,
contrastcolor=NoneColor]
%D \macros
%D {setupsubpagenumber}
%D
%D When navigating the document, we keep the title page out
%D of sight, therefore we use sub page numbers.
\setupsubpagenumber
[state=start,
way=bytext]
%D \macros
%D {setupinteractionmenu}
%D
%D There is only one interaction menu, located in the right
%D edge of the screen. Both offsets enlarge the edge by the
%D same amount as the text background offset.
\setupinteractionmenu
[right]
[state=start,
frame=off,
strut=no,
offset=0pt,
inbetween=,
bottomoffset=-5pt,
topoffset=-5pt]
%D \macros
%D {startinteractionmenu}
%D
%D The menu itself is not that spectacular. We use the
%D start||stop alternative for setting the content. The macro
%D \type {\interactioncolor} expands into either the
%D interaction color or the contrast color, the latter only
%D when no jump is possible.
\startinteractionmenu[right]
\setupinteraction[color=GotoColor]
\but [previoussubpage] \Triangle {90}\framedwidth\interactioncolor \\
\vskip10pt
\but [nextsubpage] \Triangle{270}\framedwidth\interactioncolor \\
\vfill
\but [PreviousJump] \Triangle{180}\framedwidth{NoneColor} \\
\vskip-5pt
\but [NextJump] \Triangle {0}\framedwidth{NoneColor} \\
\stopinteractionmenu
%D \macros
%D {setupinteractionbar}
%D
%D The interaction bar at the bottom is also larger than the
%D normal width of the bottom area.
\setupinteractionbar
[alternative=f,
width=\textwidth,
height=\bottomheight,
distance=10pt,
color=NoneColor,
contrastcolor=StepColor]
%D \macros
%D {setupbottomtexts}
%D
%D The bar is centered in the middle.
\setupbottomtexts
[\interactionbar]
%D We can exit viewing with a close button, located on the
%D rightmost bottom area.
\def\CloseButton
{\button
[width=\rightedgewidth,height=\bottomheight,offset=overlay,
background=color,backgroundcolor=ExitColor,frame=off]
{}%
[CloseDocument]}
\setupbottomtexts
[edge][][\CloseButton]
%D \macros
%D {definesymbol,setupitemize}
%D
%D Because some prominent things are rectangular or triangular,
%D we prefer some different symbols in itemizations:
\definesymbol[1][$\blacktriangleright$]
\definesymbol[2][$\blacktriangledown$]
\definesymbol[3][$\blacktriangleright$]
\definesymbol[4][$\blacktriangledown$]
\setupitemize[each][color=NoneColor]
%D \macros
%D {TitlePage,defineoverlay,button,setupalign,
%D setupbackgrounds,setupinteraction,setupinteractionbar,
%D startstandardmakeup,switchtobodyfont,setupinterlinespace}
%D
%D Now the main layout and navigational definitions are
%D done, it makes sense to define and tune some structuring
%D commands. First we build the titlepage.
\defineoverlay [TitleGraphic] [\useMPgraphic{title}]
\defineoverlay [NextPage] [\overlaybutton{nextpage}]
\def\StartTitlePage
{\setupbackgrounds[page][background={color,TitleGraphic,NextPage}]
\setupbackgrounds[text][text][background=]
\setupinteraction[menu=off]
\setupinteractionbar[state=stop]
\startstandardmakeup
\switchtobodyfont[24pt]
\bfd\setupinterlinespace
\setupalign[middle]
\vfil
\let\\=\vfil}
\def\StopTitlePage
{\vfil\vfil\vfil
\stopstandardmakeup
\setupinteraction[menu=on]
\setupinteractionbar[state=start]
\setupbackgrounds[page][background=color]
\setupbackgrounds[text][text][background=color]
\setupsubpagenumber[reset]}
\def\TitlePage#1%
{\StartTitlePage#1\StopTitlePage}
%D \macros
%D {Topic, Nopic, Subject,
%D definehead, setuphead}
%D
%D We use \type {\Topic} and \type {\Subject} instead of
%D chapters and sections. The \type {\Nopic} alternative is
%D meant for internal use.
\definehead [Topic] [chapter]
\definehead [Nopic] [title]
\definehead [Subject] [section]
\setuphead
[Topic, Nopic]
[after={\blank[3*medium]},
number=no,
style=\tfb,
page=yes,
alternative=middle]
\setuphead
[Subject]
[after=\blank,
number=no,
page=yes,
continue=no,
style=\tfa]
%D \macros
%D {Topics, Subjects,
%D setuplist, placelist, startcolumns}
%D
%D This style is meant for the more large presentations, and
%D therefore provided for a list of topics as well as local
%D lists of subjects. When many topics are introduces, the
%D list is typeset in columns.
\setuplist
[Topic,Subject]
[alternative=g,
interaction=all,
before=,
after=]
\setuplist
[Topic]
[criterium=all]
\def\Topics#1%
{\determinelistcharacteristics[Topic]
\ifnum\utilitylistlength>0
\Nopic[Topics]{#1}
\ifnum\utilitylistlength>12
\startcolumns
\placelist[Topic]
\stopcolumns
\else
\placelist[Topic]
\fi
\fi}
\def\Subjects%
{\placelist[Subject]}
%D Last we define the overlays. Look at the way colors are
%D linked into the macros.
\startMPinclusions
def triangle (expr wid, rot, col) =
x1 := x3 := y1 := 0 ; x2 := y3 := wid ; y2 := .5y3 ;
fill (z1--z2--z3--cycle) rotated rot withcolor col ;
currentpicture := currentpicture xysized (wid,wid) ;
enddef ;
\stopMPinclusions
\setupMPvariables
[triangle]
[width=1cm,
rotation=0,
color=black]
\startuniqueMPgraphic{triangle}{width,rotation,color}
triangle(\MPvar{width},\MPvar{rotation},\MPvar{color}) ;
\stopuniqueMPgraphic
\def\Triangle#1#2#3%
{\uniqueMPgraphic{triangle}{rotation=#1,width=#2,color=#3}}
\startuseMPgraphic{title} % can be simplified with "randomized"
color c ; path p ;
for i=1 upto 250 :
x0 := uniformdeviate \overlaywidth ;
y0 := uniformdeviate \overlayheight ;
sx := uniformdeviate 20 ;
sy := uniformdeviate 20 ;
cc := round(uniformdeviate 2) ;
if cc=0 : c := \MPcolor{GotoColor} fi ;
if cc=1 : c := \MPcolor{ExitColor} fi ;
if cc=2 : c := \MPcolor{StepColor} fi ;
qq := round(uniformdeviate 1) ;
if qq=0 :
p := unitsquare xscaled sx yscaled sy ;
else :
rr := round(uniformdeviate 3) * 90 ;
x1 := x3 := y1 := 0 ; x2 := y3 := sx; y2 := .5y3 ;
p := (z1--z2--z3--cycle) rotated rr ;
fi ;
fill p shifted z0 withcolor c ;
endfor ;
\stopuseMPgraphic
\doifnotmode{demo}{\endinput}
%D The (rather silly) demo section.
\starttext
\TitlePage{Title Page\\pre-colorfull}
\Topics{Some Nice Quotes}
\Topic{A Few}
\Subject{Knuth} \input knuth
\Subject{Tufte} \input tufte
\Topic{Some More}
\Subject{Zapf} \input zapf
\Subject{Bryson} \input bryson
\stoptext
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