[NTG-context] Re: MetaPost background

[alan.caruanambom@gmail.com]

The frame is only for reference, what I need is that the background is not wider than or higher than the frame, changing the coordinates of the points can be done but I remember seeing an example in which using "shifted" it could be done move to a corner, without worrying about the coordinates or point size

\startuseMPgraphic{fullheightbackground}
    fill unitsquare xyscaled (OverlayWidth, OverlayHeight) withcolor "gray" ;

    w := MakeupWidth;
    h := OverlayHeight;

    draw (0,0)--(w,0) withpen pencircle scaled 2pt withcolor green;
    draw (0,h)--(w,h) withpen pencircle scaled 2pt withcolor green;

    drawdot (0,0) withpen pencircle scaled 8pt withcolor red;
    drawdot (w,h) withpen pencircle scaled 8pt withcolor red;
\stopuseMPgraphic

\defineoverlay
  [fullheightbackground]
  [\useMPgraphic{fullheightbackground}]

\setupframedtexts
  [background=fullheightbackground,
   backgroundoffset=0pt,
   frame=off]

\starttext

\startframedtext[width=\textwidth,align=left]
    \input knuth
\stopframedtext

\stoptext
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