%D \module
%D   [      file=simpleslides-s-Automaton,
%D        version=2010-08-10-15:28:22+0200,
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Module --- Automaton Style,
%D         author=Philipp Gesang,
%D           date=\currentdate,
%D      copyright={Philipp Gesang}]
%C
%C Copyright 2007 Aditya Mahajan and Thomas A. Schmitz
%C This file may be distributed under the GNU General Public License v. 2.0.
%C Modified 2010 by Philipp Gesang

%D Providing presentation Backgrounds according to Conway's Game of Life.
%D Initially based on the BigNumber theme by A. Mahajan and Th. Schmitz. (Many,
%D many thanks!)

\writestatus{simpleslides}{loading Test}

\startmodule[simpleslides-s-Automaton]

\setupmodule[file=,rule=] % using defaults from lua config

\ctxlua{environment.loadluafile( "mplife" )}
\ctxlua{mplife.slides = true}

\unprotect

%D First, we change the page layout to have more space all around

\setuplayout [              width=fit,
                           margin=2cm,
                           height=fit,
	             leftmargindistance=.2cm,
	            rightmargindistance=.2cm,
                           header=18mm, 
                   headerdistance=.3cm,
                           footer=0cm, 
                   footerdistance=0mm,
                         topspace=.5cm, 
                        backspace=1.9cm,
                         location=singlesided]

\setuplayout [simpleslides:layout:horizontal][header=14mm]
\setuplayout [simpleslides:layout:vertical]  [header=0mm]
\setuplayout [simpleslides:layout:title]     

\setuplayer[simpleslides:layer:slidetitle]
    [width=\paperwidth,
    height=\paperheight,x=20mm]

%D Next we a generic frames, which will be used by other macros to
%D get a consistent look and feel.

\defineframed[simpleslides:framed:small]
             [ frame=off,
              offset=0pt,
               width=1.7cm,
               align=middle]

\setupcombinations[distance=2.5em]

%D These macros are used for placing figures/pictures:

\define\NormalHeight        {\textheight}
\define\NormalWidth         {.46\textwidth}
\define\PictureFrameHeight  {\textheight}
\define\PictureFrameWidth   {.46\textwidth}

%D This module has two color schemes, a blue one and a red one.

\startsetups simpleslides:setups:blue
\definecolor [simpleslides:contrastcolor]      [r=0.7,g=0.7,b=0.9]
%\definecolor [simpleslides:backgroundcolor]	   [s=1]
\definecolor [simpleslides:backgroundoutside]  [r=0.9,g=0.9,b=0.95]
\definecolor [simpleslides:backgroundscreen]	 [s=.975]
\definecolor [simpleslides:textcolor]          [s=0]
\stopsetups

\startsetups simpleslides:setups:red
\definecolor [simpleslides:contrastcolor]     [r=0.4]
%\definecolor [simpleslides:backgroundcolor]	  [s=.95]
\definecolor [simpleslides:backgroundoutside] [r=0.5,g=0.2,b=0.2]
\definecolor [simpleslides:backgroundscreen]	[s=.4]
\definecolor [simpleslides:textcolor]         [s=1]
\stopsetups

%D Now we choose the scheme that the user asked for

\doifsetupselse
    {simpleslides:setups:\moduleparameter{simpleslides}{color}}
    {\setups{simpleslides:setups:\moduleparameter{simpleslides}{color}}}
    {\setups{simpleslides:setups:blue}}

\setupcolors[textcolor={simpleslides:textcolor}]

%D Set the initial Game of Life snapshot (from file) and the rule, if given.

\doifsomething{\moduleparameter{simpleslides}{file}}{\ctxlua
    {mplife.setup.current.file = "\luaescapestring{\moduleparameter{simpleslides}{file}}"
     mplife.setup.current.init = gol.parse_file(mplife.setup.current.file)
     mplife.setup.current.last = mplife.setup.current.init }}

\doifsomething{\moduleparameter{simpleslides}{rule}}{\ctxlua
    {mplife.setup.current.rule = gol.parse_rule("\luaescapestring{\moduleparameter{simpleslides}{rule}}") }}

%D We also use \METAPOST\ to draw the horizontal and vertical page backgrounds.
%D Backgrounds will be of solid color, the ornament gets the transparency.
                       
\startuniqueMPgraphic{simpleslides:MP:horizontal} 
StartPage ;
fill Page withcolor \MPcolor{simpleslides:backgroundoutside} ;
fill Field[Text][Text] enlarged 0.2cm
     withcolor \MPcolor{simpleslides:backgroundscreen} ;
StopPage ;
\stopuniqueMPgraphic 

\startuniqueMPgraphic{simpleslides:MP:vertical}
StartPage ;
fill Page withcolor \MPcolor{simpleslides:backgroundoutside} ;

z1 = urcorner Field[Text][Text] shifted (.2cm,0) ;
z2 = lrcorner Field[Text][Text] shifted (.2cm,-.2cm) ;
z3 = z1 shifted (-8.05cm,0) ;
z4 = (x3,y2) ;

save Main ;
path Main ;
Main := z1 -- z2 -- z4 -- z3 --cycle ;

fill Main withcolor \MPcolor{simpleslides:backgroundscreen} ;
StopPage ;
\stopuniqueMPgraphic


%D We define these backgrounds as overlays:

\defineoverlay 
  [simpleslides:background:horizontal] 
  [\useMPgraphic{simpleslides:MP:horizontal}] 

\defineoverlay 
  [simpleslides:background:vertical] 
  [\useMPgraphic{simpleslides:MP:vertical}] 

\defineoverlay 
  [simpleslides:background:title] 
  [\useMPgraphic{simpleslides:MP:horizontal}] 

\defineoverlay 
  [simpleslides:background:ornament] 
  [\ctxlua{mplife.successive()}] 

%D The slide title is placed on the top of the text area. The layer takes care
%D of the positioning.

\setupSlideTitle
   [\c!after=,
    \c!alternative=layer,
    \c!width=\textwidth,
    \c!height=2.5cm,
    \c!command=\doSlideTitle]


%D Squares are used as the first level of itemizations 

\definesymbol[1][$\square$]
\setupitemize[1][inmargin]
%\setupitemize[each][joinedup,unpacked]

\protect
\stopmodule

\endinput