Q: structure like `folder` but with whole subtrees wrapped in boxes/nodes ?

[exaexa]

Hello,

this package is great, thanks for making it!

I was wondering if it is possible to make a folder-like style but where the whole (sub)folder trees are boxed instead of just directory names. In ascii, something like:

.---------------------.
| folder              |
| \ .----------------.|
| |\| subfolder      ||
| | | \ .-----------.||
| | | |\| subfolder |||
| | | | |           |||
| | | | '-----------'||
| | | \ .-----------.||
| | |  \| subfolder |||
| | |   |           |||
| | |   '-----------'||
| | '----------------'|
| \ .----------------.|
|  \| anotherfolder  ||
|   '----------------'|
'---------------------'

Thanks for any help/hint!
-mk

[cfr42]

Can you provide an example to work with? This should be pretty straightforward using fit.

[exaexa]

Hello,

yeah, I thought about something like this:

\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning, fit}

\begin{document}
\begin{tikzpicture}

\pgfdeclarelayer{background}
\pgfsetlayers{background,main}
\def\wrap#1#2{\begin{pgfonlayer}{background}\node[rounded corners=1ex, fit=#1, #2] {}; \end{pgfonlayer}}
\tikzstyle{bg}=[fill=cyan, inner sep=0pt, fill opacity=0.1, draw=cyan!50!black, draw opacity=0.2];
\node (/) {(root)};
\node[anchor=north west] (/a) at ([xshift=1em] /.south west) {test};
\node[anchor=north west] (/a/a) at ([xshift=1em] /a.south west) {something};
\node[anchor=north west] (/a/b) at (/a/a.south west) {something else};
\wrap{(/a/a)(/a/b)}{bg}
\wrap{(/a)(/a/a)(/a/b)}{bg}
\node[anchor=north west] (/b) at ([xshift=1em] /.south west |- /a/b.south) {folder};
\node[anchor=north west] (/b/a) at ([xshift=1em] /b.south west) {subfolder};
\wrap{(/b/a)}{bg}
\wrap{(/b)(/b/a)}{bg}
\wrap{(/)(/a)(/a/a)(/a/b)(/b)(/b/a)}{bg}
\end{tikzpicture}
\end{document}

..gives:

as the main issue, I don't know how to add proper margin&padding computation there (ideally, the background boxes would have a non-zero inner sep, but that breaks rendering at this point). I think that forest already has the necessary tools but not really sure how to use them.

(Also, my way of making the colors is suboptimal -- ideally one could select these per level or so -- but that can be done manually with much less hassle than the positioning.)

[cfr42]

I was thinking of a Forest example rather than something completely different ....

Proof-of-concept. Sašo will provide something neater, smarter and quicker if he ever has time for Forest :-). I may try to tidy it up a bit later and do something with a colour series, but it does basically work.

Note this produces lurid, solid colours for testing ;).

\documentclass{standalone}
\usepackage[edges]{forest}
\usetikzlibrary{backgrounds}
\tikzset{%
  box style/.style={%
    draw=boxcolour,
    rounded corners,
    fill=boxcolour,
    fill opacity=1,
    draw opacity=1,
    #1,
  },
  box colour/.code={%
    \colorlet{boxcolour}{#1}%
  },
  box colour=black,
}
\forestset{%
  declare toks={box colour}{black},
  boxed dirs/.style={%
    % am I using this wrong?
    % draw tree tikz processing order/.nodewalk style=tree breadth-first,
    for tree={
      folder,
      grow'=0,
      s sep'+=2.5pt,
      before typesetting nodes={%
        tempcounta/.max={level}{tree},
        if n children=0{%
          /tikz/box colour/.option=box colour,
          box style,
        }{%
          tikz+/.process={ORw2+nOw2{level}{tempcounta}{##2-##1}{box colour}
            {%
              \begin{scope}[on background layer]
                \node [box style={box colour=##2,inner sep={##1*2.5pt}},fit to=tree] {};
              \end{scope}
            }%
          },
        },
      },
    },
  },
}
\colorlet{colour0}{magenta}
\colorlet{colour1}{blue}
\colorlet{colour2}{cyan}
\begin{document}
\begin{forest}
  boxed dirs,
  for tree={box colour/.process={Ow{level}{colour#1}}},
  [(root)
    [test
      [something]
      [something else]
    ]
    [folder
      [subfolder]
    ]
  ]
\end{forest}
\end{document}