Gantt package and milestones

Question

Does anybody know how can I put several milestones in the same line? The only way I figured out is like in the picture (different lines) and so I did in the code below but it would be better to have all the milestones as one single line.

The code has been modified as I put more commands to be compiled correctly. For those who try you will need the file gantt.sty from http://www.martin-kumm.de/wiki/doku.php?id=05Misc:A_LaTeX_package_for_gantt_plots.

\documentclass{article}
  \usepackage{tikz}
  \usepackage{gantt}
  \begin{document}
   \begin{flushleft}
   \scalebox{0.7}{
    \begin{gantt}{10}{18}
    \begin{ganttitle}
     \titleelement{\textbf{2016}}{18}
     \end{ganttitle}
    \begin{ganttitle} 
       \titleelement{\textbf{April}}{2}
     \titleelement{\textbf{May}}{2}
  \titleelement{\textbf{June}}{2}
  \titleelement{\textbf{July}}{2}
  \titleelement{\textbf{August}}{2}
  \titleelement{\textbf{September}}{2}
   \titleelement{\textbf{October}}{2}
  \titleelement{\textbf{November}}{2}
   \titleelement{\textbf{December}}{2}
\end{ganttitle}
  \begin{ganttitle}

   \titleelement{01-15}{1}
  \titleelement{16-30}{1}
  \titleelement{01-15}{1}
  \titleelement{16-31}{1}
  \titleelement{01-15}{1}
  \titleelement{16-30}{1}
  \titleelement{01-15}{1}
  \titleelement{16-31}{1}
  \titleelement{01-15}{1}
  \titleelement{16-31}{1}
  \titleelement{01-15}{1}
  \titleelement{16-30}{1}
  \titleelement{01-15}{1}
  \titleelement{16-31}{1}
  \titleelement{01-15}{1}
  \titleelement{16-30}{1}
  \titleelement{01-15}{1}
  \titleelement{16-31}{1}
  \end{ganttitle}
 \ganttgroup{\textsc{\textbullet\ Internal Organization}}{0}{8}
\ganttbar[pattern=crosshatch,color=blue]{\textsf{- Responsible}}{2}{1}
\ganttbar[pattern=crosshatch,color=blue]{\textsf{- Work spaces}}{2}{1}
\ganttbar[pattern=crosshatch,color=red]{- \textbf{Inventory}}{2}{6}
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{Checkpoint}}}}{4} 
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{Checkpoint}}}}{5} 
\ganttgroup{\textsc{\textbullet\ Kick-Off}}{10}{6}
 \end{gantt}
  }
\end{flushleft}
\end{document}

Thank to all!

Answer 1

The package stores the row number in a counter called ganttnum. You can manually adjust this counter with \addtocounter{ganttnum}{n}to set the row where you want the next plot element (e.g., milestone) to appear. Positive numbers are up, negative numbers are down. If you want multiple elements on one line then you should leave the description blank for all but the first element, otherwise Tikz will draw them slightly shifted at the same position.

Example:

\ganttgroup{\textsc{\textbullet\ Internal Organization}}{0}{8}
\ganttbar[pattern=crosshatch,color=blue]{\textsf{- Responsible}}{2}{1}
\ganttbar[pattern=crosshatch,color=blue]{\textsf{- Work spaces}}{2}{1}
\ganttbar[pattern=crosshatch,color=red]{- \textbf{Inventory}}{2}{6}
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{Checkpoint}}}}{4} 
\addtocounter{ganttnum}{1}
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{}}}}{5}
\ganttgroup{\textsc{\textbullet\ Kick-Off}}{10}{3}
\addtocounter{ganttnum}{2}
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{}}}}{13}
\addtocounter{ganttnum}{-1}
\ganttgroup{\textsc{\textbullet\ Prototype}}{13}{2}
\addtocounter{ganttnum}{3}
\ganttmilestone[color=red]{\sffamily{\textit{\textcolor{red}{}}}}{15}

Result: