Re: [NTG-context] Problems with uniqueMPgraphic

[h h extern]

Adam Duck wrote:
\def\aidul{\dosingleempty\doaidul}
\def\doaidul[#1]{\inframed[background=underline,frame=off,#1]}

So, one last question remains: why doesn't this work?
\def\uli{backgroundcolor=peachpuff} \aidul[\uli]{test}
parsing 
\def\doaidul[#1]{\expanded{\inframed[background=underline,frame=off,#1]}}
would work
however, in that case i'd go for:
\def\doaidul[#1]{\inframed[background=underline,frame=off,backgroundcolor=#1]}
\definecolor[important][red]
\definecolor[notimportant][green]
and \aidul[important]{test} as well as \aidul[notimportant]{test} since one can 
redefine the colors

Hans
-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
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[NTG-context] Problems with uniqueMPgraphic

[Adam Duck]

I have this small test case:



test.tex
Description: TeX document

and it comes out with the wrong colors.  So, I think I know that this
is because of the same dimensions but I want to have different colors
for the same overlay-dimensions.  How do I do that?

bye, Adam.
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Re: [NTG-context] Problems with uniqueMPgraphic

[Hans Hagen]

Here is another approach
% small extension to underbar, accepts [settings]
\unprotected \def\underbarparameter#1{\getvalue{\??on#1}}
\unexpanded\def\dounderbar#1%
  {\let\betweenisolatedwords#1%
   \dosingleempty\redounderbar}
\unexpanded\def\redounderbar[#1]#2%
  {\iffirstargument\setupunderbar[#1]\fi
   \processisolatedwords{#2}\dodounderbar
   \egroup}
% roughly the same
\startuniqueMPgraphic{underline}{color,width,height,depth}
   numeric w,h; w := \MPvar{width} ; h := \MPvar{height} ; d := \MPvar{depth} ;
   path p; p := (0, -h)..(w/2,0 + (h/3 randomized h/3))..(w, -h);
   p := p shifted (0,-d) ;
   draw p withpen pencircle scaled 1 withcolor \MPvar{color} ;
   setbounds currentpicture to unitsquare xyscaled 
(OverlayWidth,OverlayHeight); \stopuniqueMPgraphic

hook into underbar:
\unprotect
\def\underbarmethodx#1#2#3% mp
  {\hbox to #1{\uniqueMPgraphic
{underline}{width=#1,height=#2,depth=\underbarparameter\c!bottomoffset,color=\underbarparameter\c!color}}}
\protect
% usage:
\setupunderbar[alternative=x,bottomoffset=1ex,color=red]
\startitemize
\item test: \underbars[color=blue]{how are you?}
\item test: \underbars{how are you?}
\item test: \underbars{how are you?}
\stopitemize
\stoptext
in your case, in order to make the graphic unique, you need to pass the second 
arg in order to make them unique (uniqueness is determined by dimensions and a 
few more things; another option would be to use the backgroundcolor of inframed 
which is accessible by \OverlayColor and also determines uniqueness

\startuniqueMPgraphic{underline}{color}
alternative
\startuniqueMPgraphic{underline}
   numeric w,h; w := OverlayWidth; h := ExHeight/6;
   path p; p := (0, -h)..(w/2,0 + (h/3 randomized h/3))..(w, -h);
   draw p withpen pencircle scaled 1 withcolor OverlayColor ;
   setbounds currentpicture to unitsquare xyscaled 
(OverlayWidth,OverlayHeight); \stopuniqueMPgraphic

\defineoverlay[underline][\uniqueMPgraphic{underline}]
\def\aidul{\dosingleempty\doaidul}
\def\doaidul[#1]{\inframed[background=underline,frame=off,#1]}
\setupcolors[state=start]
\startitemize
\item test: \aidul[backgroundcolor=red]{how} \aidul[color=green]{are} 
\aidul[color=blue]{you?}
\item test:\aidul[backgroundcolor=blue]{how} \aidul[color=green]{how} 
\aidul[color=red]{how}
\stopitemize

Hans
-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
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