Newsgroups: comp.text.tex

> I want to put a hierarchy diagram in my LaTeX document, something like
> this:

>    Level 1
>      |
>      |-- Level 2
>      |     |
>      |     |-- Level 3
>      |     +-- Level 3
>      +-- Level 2

  There are many packages to draw structured diagrams and trees. Choosing one
depend on various conditions, and you must explore their documentations to
found the one which would satisfy the best your needs.

  Using PSTricks, you can draw your diagram as a structured one using
the general "psmatrix" environment or as a tree. I give you both examples.

\documentclass{article}

\usepackage{pst-tree}

%   Level 1
%     |
%     |-- Level 2
%     |     |
%     |     |-- Level 3
%     |     +-- Level 3
%     +-- Level 2

\pagestyle{empty}

\begin{document}

% Drawn as general structured diagram in a matrix of cells
\begin{psmatrix}[colsep=-0.2,rowsep=0.2]
  [name=Level1] Level 1 \\
                        & [name=Level21] Level 21 \\
                        &                         & [name=Level31] Level 31 \\
                        &                         & [name=Level32] Level 32 \\
                        & [name=Level22] Level 22 \\
\end{psmatrix}
\psset{angleA=-90,angleB=180,armB=0,nodesep=0.1}
\ncangle{Level1}{Level21}
\ncangle{Level1}{Level22}
\ncangle{Level21}{Level31}
\ncangle{Level21}{Level32}

\vspace{2cm}

% Drawn as a tree (the bounding box is inaccurate)

\newcommand{\MyTree}{%
\pstree[treemode=R,treeflip=true,treesep=-0.7,levelsep=1,nodesep=0.1]%
       {\TR{Level 1}}
       {\Tn
        \pstree{\TR{Level 21}}
               {\Tn
                \TR{Level 31}
                \TR{Level 32}}
        \tspace{-1}
        \TR{Level 22}
        \TR{Level 23}
        \TR{Level 24}}}

\renewcommand{\psedge}{\ncangle[angleA=-90,angleB=180,armB=0]}

\MyTree
\psset{showbbox=true}
\MyTree

\end{document}

  Nevertheless, in the first case, you must draw the line connections
explicitely, which is painful if you have a huge diagram or many ones.
In the second case, as you need a special disposition of leaves, you must
use a negative value for the "treesep" parameter. But, as you can see
if you ask to show it ("showbbox=true"), the picture size (the corresponding
"bounding box") is not correctly computed in this case. So, you must adjust
vertically the position of the diagram. One time more, it is not pleasant if
you have several of them.

  As I found the idea useful, I try to add a complete and clean solution
to the `pst-tree' package. But as there are many different cases to test,
according the direction of the tree and the order of management of the leaves,
my test file is a little bit to huge to be sent here. So, I sent it to you
only and to the PSTricks mailing list.

Denis Girou