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%D \module
%D [ file=s-pre-08,
%D version=1999.09.01,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Environment 8,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 is one of the 6 styles made for the \NTS\ presentation
%D at \EUROTEX\ 1999. The idea was to demonstrate a couple of
%D nasty things that one can do with \PDFTEX, being an example
%D of an extension. Afterwards it was provded that this could
%D also be done using traditional \TEX.
%D
%D This version is nearly the same as the original, although
%D since then the \METAPOST\ related macro have become more
%D smooth. The original used a couple of boxes, skipt and
%D fills, while this version uses the layer mechanism that
%D came available in fall 2000. This style is actually more a
%D demonstration gimmick than a real useful one.
%D You may want to turn on layer tracing:
%D
%D \starttyping
%D \tracelayerstrue
%D \stoptyping
\setuppapersize
[S6][S6]
\setupbodyfont
[pos,10pt]
%D We use the whole page and have no margins.
\setuplayout
[topspace=0cm,
backspace=0cm,
header=0pt,
footer=0pt,
width=middle,
height=middle]
\setupcolors
[state=start]
\definecolor[TextColor][s=.9]
\definecolor[PageColor][r=.5,g=.4,b=.3]
\definecolor[LineColor][r=.7,g=.6,b=.5]
\definecolor[ColorPage][r=.5,g=.6,b=.7]
\definecolor[ColorLine][r=.3,g=.4,b=.5]
\setupinteraction
[state=start,
display=new]
\setupinteractionscreen
[option=max]
%D The page, sample text and pagenumber will have a background
%D graphic.
\defineoverlay [page] [\uniqueMPgraphic{page}]
\defineoverlay [graphic] [\uniqueMPgraphic{graphic}]
\defineoverlay [number] [\uniqueMPgraphic{number}]
%D Each element will also be a button.
\defineoverlay [nextpage] [\overlaybutton{nextpage}]
\defineoverlay [previouspage] [\overlaybutton{previouspage}]
\defineoverlay [forward] [\overlaybutton{forward}]
%D We are going to put all three elements on a layer.
\definelayer [main]
\defineoverlay [main] [\composedlayer{main}]
%D The page backgrounds are as follows:
\setupbackgrounds
[page]
[background={previouspage,page}]
%D We could have put the main layer on the page overlay, but
%D the next solution makes us independent of the back and top
%D margins. The \type {idea} layer is for user purposes.
\setupbackgrounds
[text]
[background={main,idea}]
%D The page number, sample text and explanation all have
%D associated framed texts. The two overlays \type {sample}
%D and \type {text} and there for special (user) purposes.
\defineframedtext
[PageText]
[width=fit,offset=.5cm,
before=,after=,frame=off,background={number,forward}]
\defineframedtext
[SampleText]
[width=.6\makeupwidth,height=fit,offset=2cm,align=middle,
before=,after=,frame=off,background={graphic,sample,nextpage}]
\defineframedtext
[TextText]
[width=.6\makeupwidth,height=fit,offset=2cm,align=middle,
before=,after=,frame=off,background={text,nextpage}]
%D Nothing goes on the page directly, since we use layers. The
%D \type {\null} command makes sure that at least something is
%D on the page so that the page is flushed. Here we also take
%D care of placing the page number.
\def\StartIdea
{\null \dontcomplain}
\def\StopIdea
{\setlayer
[main]
[x=\makeupwidth,y=.5cm,hoffset=-.5cm,location=lb]
{\PageText{\pagenumber}}
\page}
%D Both texts get their position registered.
\def\StartSample
{\setlayer
[main]
[hoffset=.75cm,voffset=.75cm]
\bgroup \hpos {SampText:\realfolio} \bgroup \startSampleText [none]}
\def\StopSample
{\stopSampleText \egroup \egroup}
%D Here the position of the sample text and explanationary
%D text are passed on to the graphic that concerns the latter.
% use setlayertext instead
\def\StartText
{\setMPpositiongraphic
{TextText:\realfolio}{text}{other=SampText:\realfolio}
\setlayer
[main]
[x=\makeupwidth,y=\makeupheight,
hoffset=-.75cm,voffset=-.75cm,
location=lt]
\bgroup \noindent \hpos {TextText:\realfolio} \bgroup \startTextText [none]}
\def\StopText
{\stopTextText \egroup \egroup}
%D The graphics that encircle the two texts are related to
%D their position. This is because when they overlay, a shine
%D through is shown. This only shows up when there is enough
%D text to make them overlap.
\startuniqueMPgraphic{page}
StartPage ;
pickup pencircle scaled .5cm ;
fill Page withcolor \MPcolor{PageColor} ;
draw Page withcolor \MPcolor{LineColor} ;
StopPage ;
\stopuniqueMPgraphic
\startuniqueMPgraphic{number}
path p ; p := fullcircle xscaled OverlayWidth yscaled OverlayHeight;
pickup pencircle scaled .25cm ;
fill p withcolor \MPcolor{TextColor} ;
draw p withcolor (white-\MPcolor{PageColor}) ;
\stopuniqueMPgraphic
\startuniqueMPgraphic{graphic}
path p ; p := fullcircle xscaled OverlayWidth yscaled OverlayHeight;
pickup pencircle scaled .5cm ;
fill p withcolor \MPcolor{TextColor} ;
draw p withcolor \MPcolor{LineColor} ;
\stopuniqueMPgraphic
%D This graphic is calculated when a position is flushed that
%D has this graphics as attached. The \type {self} reference
%D is provided by \CONTEXT\ itself.
\startMPpositiongraphic{text}
initialize_box(\MPpos{\MPvar{other}}) ;
path p ; p := fullcircle xscaled wxy yscaled hxy shifted cxy ;
initialize_box(\MPpos{\MPvar{self}}) ;
path q ; q := fullcircle xscaled wxy yscaled hxy shifted cxy ;
pickup pencircle scaled .5cm ;
fill q withcolor \MPcolor{TextColor} ;
draw p withcolor (white-\MPcolor{PageColor}) ;
clip currentpicture to q ;
draw q withcolor \MPcolor{LineColor} ;
anchor_box(\MPanchor{\MPvar{self}}) ;
\stopMPpositiongraphic
%D In order to be complete, we also define a title page.
%D Here suddenly the text background shows up.
\def\StartTitlePage
{\startstandardmakeup
\dontcomplain
\setupframedtexts[TextText][width=fit]
\StartText
\bfd\setupinterlinespace
\def\\{\blank\bfc\setupinterlinespace\def\\{\blank}}}
\def\StopTitlePage
{\StopText
\stopstandardmakeup}
\def\TitlePage#1%
{\StartTitlePage#1\StopTitlePage}
%D For this purpose, we redefine the position graphic to
%D handle a text only case:
\startMPpositiongraphic{text}
if box_found(\MPpos{\MPvar{other}}) :
initialize_box(\MPpos{\MPvar{other}}) ;
path p ; p := fullcircle xscaled wxy yscaled hxy shifted cxy ;
fi ;
initialize_box(\MPpos{\MPvar{self}}) ;
path q ; q := fullcircle xscaled wxy yscaled hxy shifted cxy ;
pickup pencircle scaled .5cm ;
fill q withcolor \MPcolor{TextColor} ;
if box_found(\MPpos{\MPvar{other}}) :
draw p withcolor (white-\MPcolor{PageColor}) ;
clip currentpicture to q ;
draw q withcolor \MPcolor{LineColor} ;
else :
draw q withcolor (white-\MPcolor{PageColor}) ;
fi ;
anchor_box(\MPanchor{\MPvar{self}}) ;
% setbounds currentpicture to boundingbox origin ;
\stopMPpositiongraphic
\doifnotmode{demo}{\endinput}
\starttext
\TitlePage
{Fancy Styles:\\layers}
\StartIdea
\StartSample
\input tufte
\StopSample
\StartText
\input reich
\StopText
\StopIdea
\StartIdea
\StartSample
\input knuth
\StopSample
\StartText
\input reich
\StopText
\StopIdea
\stoptext
|
