%%
%% A DANTE-Edition example
%%
%% Example 05-01-4 on page 169.
%%
%% Copyright (C) 2010 Herbert Voss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See
http://www.latex-project.org/lppl.txt for details.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{153.70511pt}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\setlength\parindent{0pt}
\usepackage{longtable}
\makeatletter
\newcommand*{\org@longtable}{}
\let\org@longtable\longtable
\def\longtable{%
\begingroup
\advance\c@LT@tables\@ne
\edef\x{LT@\romannumeral\c@LT@tables}%
\global\LongtableWidth\z@
\@ifundefined{\x}{% longtable width not available
}{\def\LT@entry##1##2{%
\global\advance\LongtableWidth##2\relax}%
\@nameuse{\x}}%
\typeout{* \x: \the\LongtableWidth}%debug output
\endgroup
\ifdim\LongtableWidth>\z@
\setlength{\LTcapwidth}{\LongtableWidth}%
\fi
\org@longtable}
\makeatother
\usepackage{longtable}
\newlength\LongtableWidth% Siehe Beispielcode
\begin{document}
\begin{longtable}{|ll|}
\caption{Caption for a \texttt{longtable}\dotfill}\\
Hello & world and some more\\
foo & bar
\end{longtable}
\begin{center}
\begin{minipage}{\LongtableWidth}
Here we have text with the same width as
the \texttt{longtable}.
\end{minipage}
\end{center}
\end{document}
