Re: [NTG-context] insert natural table at the top left of some png

15 Oct 2018


      On 10/15/2018 8:11 PM, Damien Thiriet wrote:
...
Hello,
I am still working on maps and facing some new issue.
The program I used to design one map is not convenient for writing key
to symbols, and what I have is a map.png file with big spare space on
its upper left corner.
So I have either to write on the png with ImageMagick or GIMP,
or have a nicer output with ConTeXt.
I wrote this legend file.
\definecolor[canaux][h=81b3e0]
\startreusableMPgraphic{voies}
path p; p:= (0,0) -- (20,0) ;
drawarrow p withcolor black ;
\stopreusableMPgraphic
\startreusableMPgraphic{canaux}
path p; p:= (0,0) -- (20,0) ;
drawarrow p withcolor \MPcolor{canaux} withpen pencircle scaled 2pt;
\stopreusableMPgraphic
\startbuffer
\bTABLE[frame=off]
\setupTABLE[column][1,3][align={middle,lohi}]
\bTR
    \bTH 1) \eTH \bTH Le milieu \eTH \bTH 2) \eTH \bTH Les activités \eTH
\eTR
\bTR
    \bTD \externalfigure[illustrations/zone_urbaine][height=12bp] \eTD \bTD zones urbaines \eTD
\eTR
\bTR
    \bTD \leavevmode \reuseMPgraphic{voies} \eTD \bTD infrastructures~: voies ferrées \eTD
\eTR
\bTR
    \bTD \leavevmode \reuseMPgraphic{canaux} \eTD \bTD infrastructures~: canaux \eTD
\eTR
eTR
\eTABLE
\stopbuffer
The idea was to make some
\hbox{
   \externalfigure[map][width=0.9 \textwidth]
   \vbox{\hfill -0.9 \textwidth
      \getbuffer
      }
}
to put the boxed legend at this upper left corner.
Of course I couldn't succeed, since I do not understand so much
boxes. ConTeXt complains with a missing number.
How could I achieve such boxing ?
\definecolor[canaux][h=81b3e0]

\startreusableMPgraphic{voies}
     drawarrow
         (0,0) -- (20,0)
         withcolor black ;
\stopreusableMPgraphic

\startreusableMPgraphic{canaux}
     drawarrow
         (0,0) -- (20,0)
         withcolor \MPcolor{canaux} withpen pencircle scaled 2pt;
\stopreusableMPgraphic

\startbuffer[legend]
     \bTABLE[frame=off]
         \bTR
            \bTH 1) \eTH \bTH Le milieu \eTH \bTH 2) \eTH \bTH Les 
activités \eTH
         \eTR
         \bTR
             \bTD
                 \externalfigure[t:/sources/mill.png][height=12bp]
             \eTD
             \bTD
                 zones urbaines
             \eTD
         \eTR
         \bTR
             \bTD
                 \inframed[frame=off,offset=0pt]{\reuseMPgraphic{voies}}
             \eTD
             \bTD
                 infrastructures~: voies ferrées
             \eTD
         \eTR
         \bTR
            \bTD
                 \inframed[frame=off,offset=0pt]{\reuseMPgraphic{canaux}}
             \eTD
             \bTD
                 infrastructures~: canaux
             \eTD
         \eTR
     \eTABLE
\stopbuffer

\definelayer
   [legend]
   [width=\overlaywidth,
    height=\overlayheight]

\starttext

%     \setlayer
%       [legend]
%       {\getbuffer[legend]}

     \setlayerframed
       [legend]
       [background=color,
        backgroundoffset=2pt,
        backgroundcolor=red,
        strut=no,
        frame=off]
       {\getbuffer[legend]}

     \externalfigure
       [t:/sources/cow.pdf]
       [background={foreground,legend},
        width=0.9\textwidth]

\stoptext


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