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%D \module
%D   [      file=simpleslides-s-Split,
%D        version=2009.03.30
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Module --- Split style,
%D         author=Aditya Mahajan and Thomas A. Schmitz,
%D           date=\PRESTITdate,
%D      copyright={Aditya Mahajan and Thomas A. Schmitz}]
%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.

%D This file provides the \quotation{Split} style for the presentation
%D module. It is loaded at runtime. The look of this style was inspired by the
%D \quotation{Copenhagen} theme of the \LaTeX\ \filename{beamer} package.

\writestatus{simpleslides}{loading Black Blue style}

\startmodule[simpleslides-s-Split]

\unprotect

%AM: NOTE: The black and blue colors can be made configurable.

%D First, we change the page layout to have more space on the top and the
%D bottom.

\setuplayout [width=fit,
              margin=0cm,
              height=fit,
              header=3.2cm, 
              footer=.5cm, 
              topspace=.6cm, 
              backspace=1cm,
              location=singlesided]

\setuplayout [simpleslides:layout:horizontal][header=3.2cm]
\setuplayout [simpleslides:layout:vertical]  [header=0.5cm]
\setuplayout [simpleslides:layout:title]     [header=0.5cm]

%D We also specify the position of the slidetitle.

\setuplayer[simpleslides:layer:slidetitle]
    [x=10mm,y=12mm]

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

\define\NormalHeight        {\textheight}
\define\NormalWidth         {.476\textwidth}
\define\PictureFrameHeight  {\textheight}
\define\PictureFrameWidth   {.476\textwidth}


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

\setupframed[simpleslides:framed]
             [corner=round,
              background=color,backgroundcolor={simpleslides:contrastcolor}]

\defineframed[simpleslides:framed:small]
             [frame=off,offset=0pt,strut=no,
              width=0.5\textwidth,height=0.5cm,
              top=\vss,bottom=\vss]

%D We define our color scheme:

\definecolor [simpleslides:backgroundcolor]   [s=.9]
\definecolor [simpleslides:contrastcolor]     [r=.2, g=.2, b=.72]
\definecolor [simpleslides:variantcolor]      [s=0]
\definecolor [simpleslides:itemize:color]     [simpleslides:contrastcolor]

%D We use \METAPOST\ to draw backgrounds. First, we define a few helper macros
%D to place text inside \METAPOST

\definetextext[simpleslides:sometxt:left] {\SimpleSlidesSometxtLeft}
\definetextext[simpleslides:sometxt:right]{\SimpleSlidesSometxtRight}

\unexpanded\def\SimpleSlidesSometxtLeft#1%
  {\getvalue{simpleslides:framed:small}[align=left]
                       {\switchtobodyfont[9pt]\color[simpleslides:backgroundcolor]
                       {#1\quad\strut}}}

\unexpanded\def\SimpleSlidesSometxtRight#1%
  {\getvalue{simpleslides:framed:small}[align=right]
                       {\switchtobodyfont[9pt]\color[simpleslides:backgroundcolor]
                       {\strut\quad#1}}}

%D Now we use \METAPOST\ to draw a page ornament, which will then be inherited
%D by different backgrounds.

\startuseMPgraphic{simpleslides:MP:ornament} 
StartPage ;
save p, Main, a ;
path p[] ; path Main ;

numeric a; a=.5cm ;

fill Page withcolor \MPcolor{simpleslides:backgroundcolor} ;

z1 = ulcorner Page shifted (0,-a) ;
z2 = urcorner Page shifted (0,-a) ;
z3 = llcorner Page shifted (0,a) ;
z4 = lrcorner Page shifted (0,a) ;
z5 = 1/2[ulcorner Page,urcorner Page] ;
z6 = 1/2[z1,z2] ;
z7 = 1/2[llcorner Page,lrcorner Page] ;
z8 = 1/2[z3,z4] ;

p[1] = ulcorner Page -- urcorner Page -- z2 -- z1 -- cycle ;
p[2] = ulcorner Page -- z5 -- z6 -- z1 -- cycle ;
p[3] = llcorner Page -- lrcorner Page -- z4 -- z3 -- cycle ;
p[4] = llcorner Page -- z7 -- z8 -- z3 -- cycle ;

fill p[1] withcolor \MPcolor{simpleslides:contrastcolor} ;
fill p[2] withcolor \MPcolor{simpleslides:variantcolor} ;
fill p[3] withcolor \MPcolor{simpleslides:variantcolor} ;
fill p[4] withcolor \MPcolor{simpleslides:contrastcolor} ;

draw \sometxt[simpleslides:sometxt:left]{\noexpand\moduleparameter{simpleslides:title}{date}}
     shifted (1cm,y1) ;

draw \sometxt[simpleslides:sometxt:right]{\folio\ of \lastpage}
     shifted (x5,y1) ;

draw \sometxt[simpleslides:sometxt:left]{\noexpand\moduleparameter{simpleslides:title}{author}}
     shifted (1cm,0) ;

draw \sometxt[simpleslides:sometxt:right]{\noexpand\moduleparameter{simpleslides:title}{title}}
      shifted (x5,0) ;

StopPage ;
\stopuseMPgraphic 

%D We use this ornament in different backgrounds.

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

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

%D We want the title to placed in a framed box. We redefine all the keys of
%D \type{\setupTitle}, so that the module is easier to maintain.

\setupTitle
  [\c!title=,
   \c!author=,
   \c!date=\currentdate,
   \c!headstyle=,
   \c!headcolor={simpleslides:backgroundcolor},
   \c!align=\v!middle,
   \c!before={\vfill\getvalue{simpleslides:framed}
              [\c!width=\textwidth,\c!height=.75\textheight,
               \c!align=\v!middle, \c!strut=\v!no]
              \bgroup},
   \c!after={\egroup\vfill},
   \c!title\c!style={\switchtobodyfont[\TitleSize]},
   \c!title\c!color=,
   \c!title\c!align=,%\v!middle,
   \c!author\c!style=,
   \c!author\c!color=,
   \c!author\c!align=,%\v!middle, 
   \c!date\c!style=,
   \c!date\c!color=,
   \c!date\c!align=,%\v!middle,
   \c!before\c!title=,
   \c!before\c!author=,
   \c!before\c!date=,
   \c!after\c!title={\blank[1*line]},
   \c!after\c!author={\blank[2*line]},
   \c!after\c!date=]

%D We also want the slide title in a framed box.

\setupSlideTitle
  [\c!after=,
   \c!alternative=layer,
   \c!height=2.1cm,
   \c!width=\textwidth,
   \c!color=simpleslides:backgroundcolor]


%D The symbol for the first level of itemizations. 

\definesymbol[1][\useMPgraphic{simpleslides:itemize:square}]
\setupitemize[1][\c!color={simpleslides:itemize:color}]

\protect
\stopmodule

\endinput