setbounds question

[David Arnold <dwarnold45@cox.net>]

Ah,

Not a bigger pen, but a bigger background shows the difference.

% output=pdf


\setupcolors[state=start]

\startuniqueMPgraphic{shadow}
    fill OverlayBox shifted (20pt,-20pt) withcolor .8white ;
    fill OverlayBox withcolor white ;
    draw OverlayBox withcolor red ;
    setbounds currentpicture to OverlayBox ;
\stopuniqueMPgraphic

\defineoverlay[shadow][\uniqueMPgraphic{shadow}]


\startuniqueMPgraphic{shadow2}
    fill OverlayBox shifted (20pt,-20pt) withcolor .8white ;
    fill OverlayBox withcolor white ;
    draw OverlayBox withcolor red ;
%   setbounds currentpicture to OverlayBox ;
\stopuniqueMPgraphic

\defineoverlay[shadow2][\uniqueMPgraphic{shadow2}]

\starttext

\framed
[align=middle,background=shadow,frame=off]
{\input tufte\relax}

\blank[5*big]

\framed
[align=middle,background=shadow2,frame=off]
{\input tufte\relax}


\stoptext



On Dec 23, 2005, at 1:28 AM, Hans Hagen wrote:

> David Arnold wrote:
>
>> Very cool. First time I ever could figure out what \relax does.  
>> When  I deleted it from this source, I got:
>>
>> ! I can't find file `zapf}'.
>> l.25  {\input zapf}
>>
>> Please type another input file name:
>>
>> Good learning experience for me. I've seen and ignored this type  
>> of  error message before, looking elsewhere in the code. A very  
>> good  heads up for me.
>>
>> Now is there anyway I can visualize the importance of the line
>>
>>    setbounds currentpicture to OverlayBox ;
>>
>> in this example? I deleted it and recompiled but didn't see much   
>> difference. What is the import of this line?
>
> take a bigger pen ... since the background is bigger than the  
> overlaybox it will get centered in the background which si not what  
> you want, therefore the bounding
>
> Hans
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