%%
%% This is file `bsf-example.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% beamersubframe.dtx  (with options: `example')
%% 
%% Copyright (c) 2011 Mike Kaufmann, all rights reserved
%% 
%% This program is provided under the terms of the
%% LaTeX Project Public License distributed from CTAN
%% archives in directory macros/latex/base/lppl.txt.
%% 
%% Author: Mike Kaufmann
%%         m.km@gmx.de
%% 
%% \CharacterTable
%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%%   Digits        \0\1\2\3\4\5\6\7\8\9
%%   Exclamation   \!     Double quote  \"     Hash (number) \#
%%   Dollar        \$     Percent       \%     Ampersand     \&
%%   Acute accent  \'     Left paren    \(     Right paren   \)
%%   Asterisk      \*     Plus          \+     Comma         \,
%%   Minus         \-     Point         \.     Solidus       \/
%%   Colon         \:     Semicolon     \;     Less than     \<
%%   Equals        \=     Greater than  \>     Question mark \?
%%   Commercial at \@     Left bracket  \[     Backslash     \\
%%   Right bracket \]     Circumflex    \^     Underscore    \_
%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%%   Right brace   \}     Tilde         \~}
%%
\documentclass{beamer}
\usepackage{lmodern}
\usepackage[T1]{fontenc}

\usepackage[append]{beamersubframe}

\newcommand<>{\linkdetail}[4]{%
    \ifappend{\uncover#5{\hyperlink{#3}{\beamergotobutton{#4}}}}%
             {\uncover#5{\hyperlink{#1}{\beamerskipbutton{#2}}}}
}
\newcommand<>{\returndetail}[2]{%
\ifappend{\uncover#3{\hyperlink{#1}{\beamerreturnbutton{#2}}}}%
         {\visible<0>{\beamerreturnbutton{#2}}}
}
\newcommand<>{\linkdifftext}[3]{%
    \ifappend{\uncover#4{\hyperlink{#1}{\beamergotobutton{#3}}}}%
             {\uncover#4{\hyperlink{#1}{\beamerskipbutton{#2}}}}
}

\defbeamertemplate*{sidebar left}{bsf test}[1][50]
{
  \vfill%
  \rlap{\hskip0.1cm\hbox{\color{fg!#1!bg}\tiny{\ifsubframe{detail}{main part}}}}%
  \vskip2pt%
}

\begin{document}
\begin{frame}{some frame}
\begin{itemize}[<+->]
\item there is foo
\item foo is good
\item and there is bar
\item bar is good too
\end{itemize}
\end{frame}

\begin{frame}<1-2>[label=lfoo]{frame on foo}
\begin{itemize}[<+->]
\item item a
\item item b \linkdetail<2>{lfoo<3>}{Skip Details}{ldfoob}{Goto Details}
\item item c
\item item d
\end{itemize}
\end{frame}

\begin{subframe}[label=ldfoob]{details on foo item b}
\begin{itemize}[<+->]
\item item b.1
\item item b.2
\item item b.3
\item item b.4
\end{itemize}
\end{subframe}

\begin{subframe}
\frametitle{more details on foo item b}
\begin{itemize}[<+->]
\item item b.5
\item item b.6
\item item b.7
\item item b.8
\end{itemize}

\vspace{2ex}
\returndetail<4>{lfoo<3>}{Return from Details}
\end{subframe}

\againframe<3->{lfoo}

\begin{frame}{frame on bar}
\begin{itemize}[<+->]
\item item w
\item item x
\item item y
\item item z \linkdetail<4>{lother}{Skip Details}{ldbarz}{Goto Details}
\end{itemize}
\end{frame}

\begin{subframe}[label=ldbarz]
\frametitle{details on bar item z}
\begin{itemize}[<+->]
\item item z.1
\item item z.2
\item item z.3
\item item z.4
\end{itemize}

\vspace{2ex}
\linkdifftext<4>{lother}{Skip further Details}{Return from Details}
\end{subframe}

\begin{subframe}{more details on bar item z}
\begin{itemize}[<+->]
\item item z.5
\item item z.6
\item item z.7
\item item z.8
\end{itemize}

\vspace{2ex}
\returndetail<4>{lother}{Return from Details}
\end{subframe}

\begin{frame}[label=lother]{another frame}
\begin{itemize}[<+->]
\item conclusion 1
\item conclusion 2
\item conclusion 3
\item conclusion 4
\end{itemize}
\end{frame}

\appendsubframes
\end{document}
\endinput
%%
%% End of file `bsf-example.tex'.