%D \module
%D   [       file=meta-pre,
%D        version=2001.03.21,
%D          title=\METAPOST\ Graphics, 
%D       subtitle=Predefined Goodies, 
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 In this library, we define a couple of handy graphics. 

% todo: use the predefine grid macros, mp code will move to 
% mp-* file 

\startuseMPgraphic{pagegrid} 
  StartPage ; 
    drawoptions(withcolor .8white) ; 
    fill Field[Text][Text] ; 
    drawoptions(withcolor .65white) ; 
    fill Field[Footer][Text] ; 
    fill Field[Header][Text] ; 
    fill Field[LeftMargin][Text] ; 
    fill Field[RightMargin][Text] ; 
    drawoptions(withcolor .65yellow) ; 
    fill Field[LeftEdge][Text] ; 
    fill Field[RightEdge][Text] ; 
    fill Field[Bottom][Text] ; 
    fill Field[Top][Text] ; 
    drawoptions(withpen pencircle scaled .3pt withcolor .65white) ; 
    for i=-3cm step 1cm until PaperWidth+3cm : 
      draw (i,-3cm)--(i,PaperHeight+3cm) ;
    endfor ; 
    for i=PaperHeight+3cm step -1cm until -3cm : 
      draw (-3cm,i)--(PaperWidth+3cm,i) ;
    endfor ; 
    drawoptions(withpen pencircle scaled .15pt) ; 
    for i=.5cm-3cm step 1cm until PaperWidth+3cm : 
      draw (i,-3cm)--(i,PaperHeight+3cm) ;
    endfor ; 
    for i=PaperHeight-.5cm+3cm step -1cm until -3cm : 
      draw (-3cm,i)--(PaperWidth+3cm,i) ;
    endfor ; 
    drawoptions(withpen pencircle scaled .3pt withcolor .65red) ; 
    for i=0 step 1cm until PaperWidth : 
      draw (i,0)--(i,PaperHeight) ;
    endfor ; 
    for i=PaperHeight step -1cm until 0 : 
      draw (0,i)--(PaperWidth,i) ;
    endfor ; 
    drawoptions(withpen pencircle scaled .15pt withcolor .65red) ; 
    for i=.5cm step 1cm until PaperWidth : 
      draw (i,0)--(i,PaperHeight) ;
    endfor ; 
    for i=PaperHeight-.5cm step -1cm until 0 : 
      draw (0,i)--(PaperWidth,i) ;
    endfor ; 
    drawoptions(withpen pencircle scaled 5pt withcolor .65red) ; 
    draw ulcorner Page ; 
  StopPage ;  
\stopuseMPgraphic

\defineoverlay[pagegrid][\useMPgraphic{pagegrid}]

\endinput 
