%D \module
%D   [      file=simpleslides-s-BottomSquares,
%D        version=2009.03.30
%D          title=\CONTEXT\ Style File,
%D       subtitle=Presentation Module --- BottomSquares style,
%D         author=Aditya Mahajan and Thomas A. Schmitz,
%D           date=\currentdate | update ,
%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{BottomSquares} style for the presentation
%D module. It is loaded at runtime. This minimalistic design is inspired by a
%D presentation Taco gave at EuroTeX 2006. 

\writestatus{simpleslides}{loading module BottomSquares}

\startmodule[simpleslides-s-BottomSquares]

\unprotect

%D The page layout:

\setuplayout [width=fit,
	      height=middle,
              margin=0cm,
              height=fit,
	      margindistance=0cm,
              header=0cm, 
              footer=0cm, 
              topspace=1cm,
	      bottomspace=2cm,
              backspace=1.5cm,
              location=singlesided]

\setuplayout [simpleslides:layout:horizontal][header=1.4cm]
\setuplayout [simpleslides:layout:vertical]  [header=0cm]
\setuplayout [simpleslides:layout:title]     [header=0cm]

%D We also specify the position of the slidetitle.

\setuplayer[simpleslides:layer:slidetitle]
            [x=15mm]

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

\define\NormalHeight        {\textheight}
\define\NormalWidth         {.5\textwidth}
\define\PictureFrameHeight  {\textheight}
\define\PictureFrameWidth   {.5\textwidth}

% %D We define a generic frame that is used by the slide title.
% 
% \defineframed[simpleslides:framed]
%              [frame=off,offset=0pt,
%               top=\vss,bottom=\vss]


%D We define our color scheme:

\definecolor [simpleslides:backgroundcolor]    [s=.95]
\definecolor [simpleslides:contrastcolor]      [r=.7,g=.1,b=.3]
\definecolor [simpleslides:variantcolor]       [s=.3]
\definecolor [simpleslides:itemize:color]      [simpleslides:contrastcolor]

%D We let \METAPOST\ calculate the background:

%AM: Why not implement this as an interaction bar?

\startuseMPgraphic{simpleslides:MP:ornament} 
StartPage ;

picture p ;

fill Page withcolor \MPcolor{simpleslides:backgroundcolor} ;

p := image (externalfigure "/tmp/blackboard.jpg") ;

addto currentpicture also p ;

StopPage ;
\stopuseMPgraphic 

%D We define these backgrounds as overlays:

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

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

%D We want the title information to be colored

\setupTitle
  [color=simpleslides:contrastcolor]

%D The slide title is typeset in a layer

\setupSlideTitle
  [\c!color={simpleslides:contrastcolor},
   \c!alternative=layer,
   \c!align=\v!center,
   \c!width=\textwidth,
   \c!height=3cm,
   \c!after=]

%D attempt!

\startuniqueMPgraphic{Important}
save p, q ; path p[], q[] ;
p[1] = unitsquare xyscaled (\overlaywidth,\overlayheight) ;
z[1] = ulcorner p[1] ;
z[2] = llcorner p[1] ;
save a ; numeric a ;
a = arclength (z[1] -- z[2])/15 ;
z[3] = ulcorner p[1] shifted (a,0) ;
z[4] = urcorner p[1] shifted (-a,0) ;
z[5] = urcorner p[1] shifted (0,-a) ;
z[6] = lrcorner p[1] shifted (0,a) ;
z[7] = lrcorner p[1] shifted (-a,0) ;
z[8] = llcorner p[1] shifted (a,0) ;
z[9] = llcorner p[1] shifted (0,a) ;
z[10] = ulcorner p[1] shifted (0,-a) ;
z[11] = z[8] shifted (5mm,0) ;
z[12] = z[5] shifted (0,-5mm) ;
p[2] = z[3] --- z[4] .. z[5] --- z[6]  .. z[7] --- z[8] .. z[9] --- z[10] .. cycle ;
q[1] = z[11] --- z[7] .. z[6] --- z[12] ;
for i = 3 upto 22:
	pickup pencircle scaled (i*0.5mm) ;
	draw q[1] withcolor transparent ("normal", 0.01, black) ;
endfor
pickup pencircle scaled 2pt ;
fill p[2] withcolor \MPcolor{simpleslides:contrastcolor} ;
%draw z[8] withcolor red ;
\stopuniqueMPgraphic

\defineoverlay[VImportant][\useMPgraphic{Important}]

\define[1]\Important%
  {\blank[line]\midaligned{{\framed[height=5cm,width=0.9\textwidth,frame=off,background=VImportant,align=middle,offset=0pt,top=\vss,bottom=\vss,strut=no,foregroundcolor=simpleslides:backgroundcolor]{#1}}}}

%D The symbol for the first level of itemizations. 

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

\protect
\stopmodule

\endinput

