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%D \module
%D [ file=t-darkshade,
%D version=2007.07.17,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Module darkshade,
%D author=Thomas A. Schmitz,
%D date=\currentdate,
%D copyright={Thomas A. Schmitz}]
%C
%C Copyright 2007 Thomas A. Schmitz.
%C This file may be distributed under the GNU General Public License v. 2.0.
%D This file provides the \quotation{darkshade} style for the presentation
%D module. It is loaded at runtime.
\writestatus{loading}{module darkshade}
\startmodule[darkshade]
\unprotect
%D The taspresentation module provides a skeleton into which different styles
%D can be hooked. It uses a number of variables and macros which have to be set
%D beforehand. Some parts are optional. We begin with the necessary definitions:
%D We start colors; textcolor is white:
\setupcolors[state=start,textcolor=white]
%D The darkshade module has parameters of its own; we set them up and use
%D them:
\setupmodule[color=blue]
\processaction[\currentmoduleparameter{color}]
[ blue=>\def\colormode{bluemode},
green=>\def\colormode{greenmode},
bluered=>\def\colormode{blueredmode},
\v!unknown=>\def\colormode{bluemode},
\v!default=>\def\colormode{bluemode}]
\enablemode[\colormode]
%D These macros are used for placing figures/pictures:
\define\NormalHeight{.83\textheight}
\define\NormalWidth{.476\textwidth}
\define\PictureFrameHeight{.83\textheight}
\define\PictureFrameWidth{.476\textwidth}
%D The page layout:
\setuplayout [width=fit,
margin=1.5cm,
leftmargindistance=0pt,
rightmargindistance=0pt,
height=fit,
header=0pt,
footer=5pt,
topspace=.8cm,
backspace=1.5cm,
bottomspace=.8cm,
bottom=12pt,
location=singlesided]
%D The macro for typesetting the Slidetitle:
\define[1]\Slidetitle{\page\midaligned{\switchtobodyfont[\Titlesize]#1}\blank[0.75cm]}
%D The macro \tex{Maketitle} produces a default title page with the author, the
%D title of the presentation, and the date. Using it is not mandatory.
\define\Maketitle{%
\titback
\null
\vfill
\midaligned{\switchtobodyfont[\Titlesize]\getvariable{taspresent}{title}}
\blank[2*line]
\midaligned{\getvariable{taspresent}{author}}
\blank[3*line]
\midaligned{\currentdate}
\vfill
\null}
%D The following parts are optional; if you don't use backgrounds and are
%D content with CONTEXT's default itemization, you don't have to set these
%D macros.
%D We define our colors:
\startmode[blueredmode]
\definecolor [InteractionColor] [b=.2]
\definecolor [ContrastColor] [b=.8]
\definecolor [One] [s=.6]
\definecolor [Item] [s=1]
\definecolor [a] [r=0.5,g=0,b=0]
\definecolor [b] [r=0,g=0,b=0.5]
\stopmode
\startmode[bluemode]
\definecolor [InteractionColor] [b=.2]
\definecolor [ContrastColor] [b=.8]
\definecolor [One] [s=.6]
\definecolor [Item] [s=1]
\definecolor [a] [r=0,g=0,b=1]
\definecolor [b] [r=0,g=0,b=0.05]
\stopmode
\startmode[greenmode]
\definecolor [InteractionColor] [s=.2]
\definecolor [ContrastColor] [s=.5]
\definecolor [One] [s=.6]
\definecolor [Item] [s=1]
\definecolor [a] [r=0,g=.8,b=0]
\definecolor [b] [r=0,g=0.05,b=0]
\stopmode
%D We let Metapost calculate the background:
\startuniqueMPgraphic{LinearShade}
path p ;
p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
linear_shade(p,6,\MPcolor{a},\MPcolor{b}) ;
\stopuniqueMPgraphic
%D We define these backgrounds as overlays:
\defineoverlay
[lecbackground]
[\useMPgraphic{LinearShade}]
%D These are shortcuts to switch backgrounds:
\define\lecback{\setupbackgrounds[page][background=lecbackground]\setupinteractionbar[state=start]}
\define\titback{\setupbackgrounds[page][background=lecbackground]\setupinteractionbar[state=stop]}
\define\picback{\setupbackgrounds[page][background=lecbackground]\setupinteractionbar[state=start]}
\define\noback{\setupbackgrounds[page][background=lecbackground]}
\setupbackgrounds[page][background=lecbackground]
%D The symbol for the first level of itemizations.
\definesymbol[1][\useMPgraphic{ItSquare}]
%D The \quotation{darkshade} style uses \CONTEXT's interactionbar:
\setupsubpagenumber[way=bytext,state=start]
\setupinteraction
[page=yes,
color=InteractionColor,
contrastcolor=ContrastColor,
menu=on,
state=start]
\startinteractionmenu[bottom]
{\interactionbar[alternative=f,width=\makeupwidth,height=1ex]}
\stopinteractionmenu
\protect
\stopmodule
\endinput
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