[NTG-context] Re: Question about matrices with vertical and horizontal lines (and now adding arrows between cells)

27 Feb 2025

      Thanks again. This is exquisite, truly.

One of the many things I like about using ConTeXt is that whenever I try to do something new, I learn amazing things I didn’t even know were possible.

Matthias
...
On Feb 27, 2025, at 3:52 PM, Mikael Sundqvist  wrote:
Hi,
On Thu, Feb 27, 2025 at 9:04 PM Matthias Weber
 wrote:
...
Thanks!
Now, I would like to have arrows between cells. I have tried using overlays (see below), and I understand that an overlay is centered within the cell. How do I move the arrow so that it points from 6 to 7, for instance?
(Starting a little to the right and above the 6, ending below and to the left of the 7)
Matthias
\starttext
\startuseMPgraphic{DiagonalArrow}
 numeric w, h;
 w := OverlayWidth ;
 h := OverlayHeight ;
       draw lmt_arrow [ path =((.5*w,.5*w) -- (2*w,2*w)), ]
   withpen pencircle
   scaled (h/40)
   withcolor "darkgreen" ;
\stopuseMPgraphic
\defineoverlay
 [DiagonalArrow]
 [\useMPgraphic{DiagonalArrow}]
\setupTABLE[c][width=1cm,offset=overlay,align={middle,lohi}]
\setupTABLE[r][height=1cm]
\bTABLE
 \bTR \bTD 17 \eTD  \bTD  24 \eTD \bTD   1 \eTD \bTD  8\eTD \bTD  15 \eTD \eTR
  \bTR \bTD 23 \eTD  \bTD  5 \eTD \bTD  7 \eTD \bTD  14\eTD \bTD  16 \eTD \eTR
   \bTR \bTD 4 \eTD  \bTD  [background=DiagonalArrow] 6 \eTD \bTD  13 \eTD \bTD 20\eTD \bTD 22 \eTD \eTR
    \bTR \bTD 10 \eTD  \bTD  12 \eTD \bTD 19 \eTD \bTD 21\eTD \bTD 3 \eTD \eTR
  \bTR \bTD 11 \eTD  \bTD  18 \eTD \bTD 25 \eTD \bTD  2\eTD \bTD 9 \eTD \eTR
\eTABLE
\stopExample
\stoptext
Maybe https://www.pragma-ade.com/general/manuals/metafun-p.pdf,
section 5, Positional graphics, is what you look for?
/Mikael
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