A LaTeX package for drawing gantt plots using pgf

Package Description

In the following you will find a short description of environments and commands:

The gantt environment draws the canvas of a gantt figure (realized as tikzpicture)
The usage is \begin{gantt}[...]{no of Tasks to plot}{no of time slots}
The optional argument [...] can be filled in a key=value syntax, using one or more of the following keys:

xunitlength - length of one time slot (default: 1 cm)
fontsize - fontsize of labels (default: \normalsize)
titlefontsize - fontsize of title section (default: \small)
drawledgerline - Switch to enable/disable the drawing of horizontal ledger lines (default value: false)

ganttitle is the environment for drawing the title section

\titleelement draws one element of the title
usage: \titleelement{label}{length}

\numtitle draws a numbered sequence of title elements
usage: \numtitle{start number}{increment}{end number}{length of each title element}

\ganttbar draws a single, unconnected bar for representing a task
usage: \ganttbar[pattern=<pattern>,color=<color>]{label}{start}{length}
where the optional comma separated arguments are:
<pattern> - is a tikz pattern (e.g. north west lines (default), north east lines, crosshatch, crosshatch dots, grid, ...)
<color> - a tikz color of the pattern (e.g. black (default), red, green blue gray, dark gray)
for more information see the tikz documentation

\ganttcon draws an arrow between to bars with specified coordinates
usage: \ganttbar{startx}{starty}{endx}{endy}

\ganttbarcon draws a single bar *and* connects the bar with the previous bar (or milestone) for consecutive tasks
usage: \ganttbar[pattern=<pattern>,color=<color>]{label}{start}{length}
where the optional pattern argument are the same as for \ganttbar

\ganttgroup draws a bar to group tasks
usage: \ganttgroup{label}{start}{length}

\ganttmilestone draws a milestone using a diamond
usage: \ganttmilestone[color=<color>]{label}{start}
where the optional color argument argument is:
<color> - a tikz color of the pattern (e.g. black (default), red, green blue gray, dark gray)

\ganttmilestonecon draws a milestone using a diamond *and* connects the milestone with the previous bar or milestone
usage: \ganttmilestonecon[color=<color>]{label}{start}
where the optional color argument argument is:
<color> - a tikz color of the pattern (e.g. black (default), red, green blue gray, dark gray)

Examples

The usage is best explained by some examples.
Here is a minimal example:

\documentclass{article}

\usepackage{tikz}
\usepackage{gantt}

\begin{document}
  \begin{gantt}{10}{12}
    \begin{ganttitle}
    \numtitle{1}{1}{12}{1}
    \end{ganttitle}
    \ganttbar{a task}{0}{2}
    \ganttbarcon{a consecutive task}{2}{4}
    \ganttbarcon{another consecutive task}{8}{2}
    \ganttmilestone[color=cyan]{Milestone with color!}{4}
    \ganttbar{another task}{2}{2}
    \ganttbar[color=cyan]{another coloured task}{4}{4}
    \ganttbar{another task}{4}{2}
    \ganttcon{4}{5}{4}{7}
    \ganttmilestonecon{A connected Milestone}{7}
    \ganttbarcon{another consecutive task}{8}{2}
  \end{gantt}
\end{document}

leading to the result:

Here is a similar example using the names of the month's:

...
  \begin{gantt}{7}{12}
    \begin{ganttitle}
      \titleelement{Jan}{1}
      \titleelement{Feb}{1}
      \titleelement{Mar}{1}
      \titleelement{Apr}{1}
      \titleelement{May}{1}
      \titleelement{Jun}{1}
      \titleelement{Jul}{1}
      \titleelement{Aug}{1}
      \titleelement{Sep}{1}
      \titleelement{Oct}{1}
      \titleelement{Nov}{1}
      \titleelement{Dec}{1}
    \end{ganttitle}
    \ganttbar{Task 1}{0}{2}
    \ganttbarcon{a consecutive task}{2}{4}
  \end{gantt}
...

leading to the result:

You can use more titles with diffent length' to divide the time axis:

...
  \begin{gantt}{7}{12}
    \begin{ganttitle}
      \numtitle{2010}{1}{2012}{4}
    \end{ganttitle}
    \begin{ganttitle}
      \numtitle{1}{1}{4}{1}
      \numtitle{1}{1}{4}{1}
      \numtitle{1}{1}{4}{1}
    \end{ganttitle}
    \ganttbar{Task 1}{0}{2}
    \ganttbarcon{a consecutive task}{2}{4}
  \end{gantt}
...

leading to the result:

Here is a more complex example using groups, different patterns and the optional arguments:

\documentclass{article}

\usepackage{gantt}
\usepackage{pdflscape}

\begin{document}
  \begin{landscape}
  \scalebox{0.8}{
  \begin{gantt}[xunitlength=0.5cm,fontsize=\small,titlefontsize=\small,drawledgerline=true]{10}{48}
    \begin{ganttitle}
      \titleelement{2009}{7}
      \numtitle{2010}{1}{2012}{12}
      \titleelement{2013}{5}
    \end{ganttitle}
    \begin{ganttitle}
      \numtitle{6}{1}{12}{1}
      \numtitle{1}{1}{12}{1}
      \numtitle{1}{1}{12}{1}
      \numtitle{1}{1}{12}{1}
      \numtitle{1}{1}{5}{1}
    \end{ganttitle}
    \ganttbar{task 1}{2}{17}
    \ganttgroup{a group of tasks}{6}{18}
    \ganttbar{task 2}{5}{10}
    \ganttbar[pattern=crosshatch,color=blue]{task 3}{15}{3}
    \ganttbar{task 4}{20}{3}
    \ganttcon{15}{4}{20}{6}
    \ganttbar{task 5}{15}{5}
    \ganttbarcon[color=red]{task 6}{20}{5}
    \ganttbarcon{task 7}{30}{5}
  \end{gantt}
  }
  \end{landscape}
\end{document}

leading to the result: