Add support for global table of contents showing all parts

[josephwright]

Originally reported by: Nicolas M. Thiéry (Bitbucket: nthiery, GitHub: nthiery)

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Add support for global table of contents showing all parts:

\tableofcontents{parts=<...>}

similar to:

\tableofcontents{sections=<...>}

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• Bitbucket: https://bitbucket.org/rivanvx/beamer/issue/65

[josephwright]

Original comment by Vedran Miletić (Bitbucket: rivanvx, GitHub: Unknown):

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This would be interesting.

[samcarter]

As a workaround to show a toc for all parts:

\documentclass{beamer}

\makeatletter
\AtBeginPart{%
    \addtocontents{parttoc}{\protect\beamer@partintoc{\the\c@part}{\beamer@partnameshort}{\the\c@page}}%
}
\newcommand{\parttableofcontents}{\@starttoc{parttoc}}
\newcommand{\beamer@partintoc}[3]{#2\par\tableofcontents[part=#1]\par}
\makeatother

\begin{document} 

\begin{frame}
\parttableofcontents
\end{frame}

\part{part1}
\section{section name1}
\begin{frame}
	abc
\end{frame}	
	
\part{part2}
\section{section name2}
\begin{frame}
	abc
\end{frame}	
	
\end{document}