Beamer Slide header is not including subsubsection - latex

Question

I am using beamer to make my slides. I managed to have the subsections show in the header. For example subsection of Security is (1) Background (2) PerSpectron (3) Commercial ....
How can I add subsubsections in the header too? For example, I want to have several subsections to the background appear in an extra column in the header, similar to subsections. Is there any way to do this? Thank you.

Answer 1

First I'd like to quote the beamer users guide:
"Do not use subsubsections, they are evil."
If you want to torture your audience, you can use this quick hack. Make sure that:
you have more sections/subsections than subsubsections, otherwise the height might be wrong
you set the counter for the number of subsubsection in each subsection
\documentclass{beamer}
\usetheme{Warsaw}
\usepackage{pgffor}
\newcounter{totalsubsub}
\AtBeginSubsubsection[]{\label{subsubsec:\thesection:\thesubsection:\thesubsubsection}}
\makeatletter
\setbeamertemplate{headline}{%
\leavevmode%
\#tempdimb=2.4375ex%
\ifnum\beamer#subsectionmax<\beamer#sectionmax%
\multiply\#tempdimb by\beamer#sectionmax%
\else%
\multiply\#tempdimb by\beamer#subsectionmax%
\fi%
\ifdim\#tempdimb>0pt%
\advance\#tempdimb by 1.825ex%
\begin{beamercolorbox}[wd=.33\paperwidth,ht=\#tempdimb]{section in head/foot}%
\vbox to\#tempdimb{\vfil\insertsectionnavigation{.33\paperwidth}\vfil}%
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.34\paperwidth,ht=\#tempdimb]{subsection in head/foot}%
\vbox to\#tempdimb{\vfil\insertsubsectionnavigation{.33\paperwidth}\vfil}%
\end{beamercolorbox}%
\begin{beamercolorbox}[leftskip=3.3ex,wd=.33\paperwidth,ht=\#tempdimb]{section in head/foot}%
\begin{minipage}[b][\#tempdimb][c]{.9\linewidth}%
\ifnum\thetotalsubsub>0
\foreach \i in {1,...,\thetotalsubsub}{%
\ifnum\i=\thesubsubsection
\usebeamercolor[fg]{subsubsection in sidebar}
\else
\usebeamercolor[fg]{subsubsection in sidebar shaded}
\fi
\hyperlink{subsubsec:\thesection:\thesubsection:\i}{\nameref{subsubsec:\thesection:\thesubsection:\i}}\par
}
\fi
\end{minipage}%
\end{beamercolorbox}%
\fi%
}
\makeatother
\begin{document}
\section{section}
\subsection{sub 1}
\setcounter{totalsubsub}{3}
\subsubsection{subsub 1}
\begin{frame}
subsub 1
\end{frame}
\subsubsection{subsub 2}
\begin{frame}
subsub 2
\end{frame}
\subsubsection{subsub 3}
\begin{frame}
subsub 3
\end{frame}
\subsection{sub 2}
\setcounter{totalsubsub}{0}
\begin{frame}
abc
\end{frame}
\subsection{sub 3}
\setcounter{totalsubsub}{2}
\begin{frame}
content...
\end{frame}
\subsubsection{subsub 1}
\begin{frame}
subsub 1
\end{frame}
\subsubsection{subsub 2}
\begin{frame}
subsub 2
\end{frame}
\end{document}