%D \module
%D [ file=s-pre-19,
%D version=2000.07.31,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Environment 19,
%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 is made in the process or writing the \METAFUN\
%D manual. It exploits a few tricks, like graphics calculated
%D using positional information. It also uses the (at that
%D moment) new menu list placement alternative. If you forget
%D about the definition of the button shapes, which is
%D complicated in any system, this style is not even that hard
%D to follow. Watch how the left side of the buttons follow
%D the right side of the text graphic.
%D
%D While playing bit with this style, the random alternative
%D made me think of those organic building with non equal
%D windows (we have a few in The Netherlands), so I decided to
%D label this style as \type {pre-organic}.
%D
%D At the end of this file, there is a small test file, so
%D when you process this file with \TEXEXEC\ and the options
%D \type {--mode=demo} and \type {--pdf}, you will get a demo
%D document.
%D We use one of the standard screen \quote {paper} sizes, and
%D map it onto the same size, so that we get a nicely cropped
%D page.
\setuppapersize
[S6][S6]
%D Like in the \METAFUN\ manual, we use the Palatino as main
%D bodyfont. This font is quite readable on even low
%D resolution screens, although I admit that this style is
%D developed using an $1400\times1050$ pixel LCD screen, so I
%D may be biased.
%\startmode[asintended] \setupbodyfont[ppl] \stopmode
%D The layout specification sets up a text area and a right
%D edge area where the menus will go. Watch the rather large
%D edge distance. By setting the header and footer dimensions
%D to zero, we automatically get rid of page body ornaments,
%D like the pagenumber.
\setuplayout
[topspace=48pt,
backspace=48pt,
cutspace=12pt,
width=400pt,
margin=0cm,
rightedge=88pt,
rightedgedistance=48pt,
header=0cm,
footer=0cm,
height=middle]
%D We use a moderate, about a line height, interparagraph
%D white space.
\setupwhitespace
[big]
%D Of course we use colors, since on computer displays they
%D come for free.
\setupcolors
[state=start]
\definecolor [red] [r=.75]
\definecolor [yellow] [r=.75,g=.75]
\definecolor [gray] [s=.50]
\definecolor [white] [s=.85]
\definecolor [PageColor] [yellow]
\definecolor [TextColor] [white]
\definecolor [OrnamentColor] [red]
\definecolor [InteractionColor] [red]
\definecolor [ContrastColor] [gray]
%D This is an interactive document, so we enable interaction.
%D In this style, we disable the viewer's \quote {highlight a
%D hyperlink when it's clicked on} feature. We will use a
%D menu, so we enable menus. Later we will see the contract
%D color |<|hyperlinks gets that color when we are already on
%D the location|>| in action.
\setupinteraction
[state=start,
click=off,
color=InteractionColor,
contrastcolor=ContrastColor,
menu=on]
%D The menu itself is set up as follows. Because we will
%D calculate menubuttons based on their position on the page,
%D we have to keep track of the positions. Therefore, we set
%D the \type {position} variable to \type {yes}.
\setupinteractionmenu
[right]
[frame=off,
position=yes,
align=middle,
topoffset=-.75cm,
bottomoffset=-.75cm,
color=gray,
contrastcolor=gray,
style=bold,
before=,
after=]
%D The menu content is rather sober: a list of topics (later
%D we will define the command that generates topic entries),
%D and a close button.
\startinteractionmenu[right]
\placelist[Topic][alternative=right]
\vfill
\but [CloseDocument] close \\
\stopinteractionmenu
%D We have now arived at the more interesting part of the style
%D definition: the graphic that goes in the page background.
%D Because this graphic will change, we define a usable
%D \METAPOST\ graphic. Page backgrounds are recalculated each
%D page, opposite to the other backgrounds that are calculated
%D when a new background is defined, or when repetitive
%D calculation is turned on.
\setupbackgrounds
[page]
[background=page]
\defineoverlay
[page]
[\useMPgraphic{page}]
\setupMPvariables
[page]
[alternative=3]
\startuseMPgraphic{page}
\includeMPgraphic{rightsuperbutton}
StartPage ;
path p, q ; pickup pencircle scaled 3pt ;
p := Field[Text][Text] enlarged 36pt superellipsed .90 ;
fill Page withcolor \MPcolor{PageColor} ;
fill p withcolor \MPcolor{TextColor} ;
draw p withcolor \MPcolor{OrnamentColor} ;
p := Field[Text][Text] enlarged 48pt superellipsed .90 ;
def right_menu_button (expr nn, rr, pp, xx, yy, ww, hh, dd) =
if (pp>0) and (rr>0) :
q := rightsuperbutton(p,xx,yy,RightEdgeWidth,hh) ;
fill q withcolor \MPcolor{TextColor} ;
draw q withcolor if rr=2 : \MPcolor{ContrastColor}
else : \MPcolor{InteractionColor} fi ;
fi ;
enddef ;
\MPmenubuttons{right}
StopPage ;
\stopuseMPgraphic
\startuseMPgraphic{page}
\includeMPgraphic{rightsuperbutton}
StartPage ;
numeric alternative, seed, superness, squeezeness, randomness ;
path p, q ; transform t ;
alternative := \MPvar{alternative} ;
seed := uniformdeviate 100 ;
if alternative > 10 :
superness := .85 + ((\realfolio-1)/\lastpage) * .15 ;
squeezeness := 12pt - ((\realfolio-1)/\lastpage) * 10pt ;
else :
superness := .90 ;
squeezeness := 12pt ;
fi ;
randomness := squeezeness ;
alternative := alternative mod 10 ;
t := identity if alternative=3: shifted (9pt,-9pt) fi ;
% first we draw the shape that surrounds the text
randomseed := seed ;
p := Field[Text][Text] enlarged if
alternative = 1 : 36pt superellipsed superness elseif
alternative = 2 : 36pt squeezed squeezeness elseif
alternative = 3 : 36pt randomized randomness else
: 36pt fi ;
pickup pencircle scaled 3pt ;
fill Page withcolor \MPcolor{PageColor} ;
fill p withcolor \MPcolor{TextColor} ;
draw p withcolor \MPcolor{OrnamentColor} ;
% we set p to the wider shape from which we will chip off pieces
randomseed := seed ;
p := ( Field[Text][Text] enlarged if
alternative = 1 : 48pt superellipsed superness elseif
alternative = 2 : 48pt squeezed squeezeness elseif
alternative = 3 : 36pt randomized randomness else
: 48pt fi ) transformed t ;
% calls to *_menu_button are generated automatically ...
vardef right_menu_button (expr nn, rr, pp, xx, yy, ww, hh, dd) =
save q ; path q ;
if (pp>0) and (rr>0) :
q := rightsuperbutton(p,xx,yy,RightEdgeWidth,hh) ; % \MPw{menu:right:\realfolio}
fill q withcolor \MPcolor{TextColor} ;
draw q withcolor if rr=2 : \MPcolor{ContrastColor}
else : \MPcolor{InteractionColor} fi ;
fi ;
enddef ;
% ... and inserted when the graphic data is flushed here ...
\MPmenubuttons{right}
StopPage ;
\stopuseMPgraphic
\startuseMPgraphic{rightsuperbutton}
vardef rightsuperbutton (expr pat, xpos, ypos, wid, hei) =
save p, ptop, pbot, t, b, edge, shift, width, height ;
path p, ptop, pbot ; pair t, b ; numeric edge, shift, width, height ;
edge := xpos + wid ; shift := ypos + hei ;
p := rightpath pat ;
ptop := ((-infinity,shift)--(edge,shift)) ;
pbot := ((-infinity,shift-hei)--(edge,shift-hei)) ;
t := p intersection_point ptop ;
b := p intersection_point pbot ;
p := subpath(0,xpart (p intersectiontimes ptop)) of p ;
p := subpath(xpart (p intersectiontimes pbot),length(p)) of p ;
(p -- t -- point 1 of ptop &
point 1 of ptop -- point 1 of pbot &
point 1 of pbot -- b
-- cycle)
enddef ;
\stopuseMPgraphic
%D Topics are identified with \type {\Topic}, which is an
%D instance of chapter headings. The number is made invisible.
%D Since it still is a numbered section header, \CONTEXT\ will
%D write the header to the table of contents.
\definehead
[Topic]
[chapter]
\setuphead
[Topic]
[number=no]
%D We will use a bold font in the table of contents. We also
%D force a complete list.
\setuplist
[Topic]
[criterium=all,
style=bold,
before=,
after=]
%D The \type {\TitlePage} macro looks horrible, because we
%D want to keep the interface simple: a list of small
%D sentences, separated by \type {\\}.
\def\StartTitlePage
{\startstandardmakeup
\switchtobodyfont[big]
\def\\{\vfill\bfb\let\\=\par}
\bfd\setupinterlinespace\gray
\vskip.5cm}
\def\StopTitlePage
{\\\vskip.5cm % the \\ is really needed
\stopstandardmakeup}
\def\TitlePage#1%
{\StartTitlePage#1\StopTitlePage}
%D A couple of goodies:
\def\Subject {\Topic}
\def\Topics #1{}
\def\Subjects {}
%D For those who want to test:
\doifnotmode{demo}{\endinput}
\starttext
\setupMPvariables[page][alternative=3]
\TitlePage
{A Few Nice Quotes\\
A Simple Style Demo\\
Hans Hagen, August 2000}
\Topic {Douglas R. Hofstadter} \input douglas \page
\Topic {Donald E. Knuth} \input knuth \page
\Topic {Edward R. Tufte} \input tufte \page
\Topic {Hermann Zapf} \input zapf \page
%Topic {David F. Stork} \input stork \page
\stoptext