2018-09-01 17:04 GMT+02:00 Robert Klein <roklein@roklein.de>:

> On Sat, 1 Sep 2018 12:38:54 +0200
> Cecil Westerhof <cldwesterhof@gmail.com> wrote:
>
> > I have the following:
> > #+BEGIN_SRC dot :file Graphviz/habitLoop.png :cmdline -Kfdp -Tpng
> > digraph habitLoop {
> >     bgcolor = steelblue
> >     edge [penwidth = 4.0 ]
> >     node [fontcolor = white, fontsize = 60, style = filled]
> >
> >     spur   [pos = "4,4!" color = red]
> >     habit  [pos = "7,1!" color = darkgreen]
> >     reward [pos = "1,1!" color = blue]
> >
> >     spur:e   -> habit:n
> >     habit:w  -> reward:e
> >     reward:n -> spur:w
> >
> >     copyright [
> >                 pos       = "4,.75!"
> >                 color     = steelblue,
> >                 fontcolor = black,
> >                 fontsize  = 14,
> >                 label     = "© Cecil
> > Westerhof\nTimeManagement@Decebal.nl", shape     = plaintext
> >               ]
> >
> >     spur   [label = "Spur"]
> >     habit  [label = "Habit"]
> >     reward [label = "Reward"]
> > }
> > #+END_SRC
> >
> > But I also want to have a Dutch version. So I also have:
> > #+BEGIN_SRC dot :file Graphviz/gewoonteLoop.png :cmdline -Kfdp -Tpng
> > digraph habitLoop {
> >     bgcolor = steelblue
> >     edge [penwidth = 4.0 ]
> >     node [fontcolor = white, fontsize = 60, style = filled]
> >
> >     spur   [pos = "4,4!" color = red]
> >     habit  [pos = "7,1!" color = darkgreen]
> >     reward [pos = "1,1!" color = blue]
> >
> >     spur:e   -> habit:n
> >     habit:w  -> reward:e
> >     reward:n -> spur:w
> >
> >     copyright [
> >                 pos       = "4,.75!"
> >                 color     = steelblue,
> >                 fontcolor = black,
> >                 fontsize  = 14,
> >                 label     = "© Cecil
> > Westerhof\nTimeManagement@Decebal.nl", shape     = plaintext
> >               ]
> >
> >     spur   [label = "Prikkel"]
> >     habit  [label = "Gewoonte"]
> >     reward [label = "Beloning"]
> > }
> > #+END_SRC
> >
> > The only difference are the three label statements. Can this be done
> > more efficient? Because now I need to do updates at two places. That
> > is an accident waiting to happen.
> >
>
>
> There's a complicated solution (like, using variables from tables) at
> https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-dot.html
>
> In your case you might want to use noweb (see
> https://orgmode.org/org.html#Noweb-reference-syntax).  Then your code
> might look like this:
>
> #+Name: habitloop-main
> #+BEGIN_SRC dot
>     bgcolor = steelblue
>     edge [penwidth = 4.0 ]
>     node [fontcolor = white, fontsize = 60, style = filled]
>
>     spur   [pos = "4,4!" color = red]
>     habit  [pos = "7,1!" color = darkgreen]
>     reward [pos = "1,1!" color = blue]
>
>     spur:e   -> habit:n
>     habit:w  -> reward:e
>     reward:n -> spur:w
>
>     copyright [
>                 pos       = "4,.75!"
>                 color     = steelblue,
>                 fontcolor = black,
>                 fontsize  = 14,
>                 label     = "© Cecil
>     Westerhof\nTimeManagement@Decebal.nl",
>                 shape     = plaintext
>               ]
> #+END_SRC
>
>
> #+BEGIN_SRC dot :file gewoonteLoop.png :cmdline -Kfdp -Tpng :noweb yes
> digraph habitLoop {
>     <<main-loop>>
>     spur   [label = "Prikkel"]
>     habit  [label = "Gewoonte"]
>     reward [label = "Beloning"]
> }
> #+END_SRC
>
> #+RESULTS:
> [[file:gewoonteLoop.png]]
>
> #+BEGIN_SRC dot :file habitLoop.png :cmdline -Kfdp -Tpng :noweb yes
> digraph habitLoop {
>     <<main-loop>>
>     spur   [label = "Spur"]
>     habit  [label = "Habit"]
>     reward [label = "Reward"]
> }
> #+END_SRC
>

I tried this, but I did not get it to work. Maybe something in my
configuration is wrecking havoc on me. I have to play with it a bit more I
am afraid.



> Note, for better looks I put the whole surrounding block in the
> language-specific parts (the “digraph”-line could be in the
> “habitloop-main” block, too).
>
>
> When your code gets more involved this can get ugly, fast.  Then you'll
> probably have to go the elisp way.
>

For the moment I do not think it will get more involved very soon, but you
never know. Maybe the elisp route is not a bad idea.

-- 
Cecil Westerhof