%
%  A Beamer Theme Which Looks A Bit Like ZIH Presentation Template
%
%  Matthias.Lieber@tu-dresden.de
%

%
%  Setup stuff:
%

\definecolor{darkblue}{rgb}{0.04, 0.16, 0.32}

% color for footer and navigation header (if activated, see below)
\setbeamercolor*{palette primary}{fg=black,bg=white}

% color for subsection navigation (if activated, see below)
\setbeamercolor*{palette secondary}{fg=white,bg=darkblue}

% Add the typical beamer navigation stuff in the head?
\newif\ifbeamer@theme@navigation
\beamer@theme@navigationfalse
%\beamer@theme@navigationtrue

% Include subsection names in the head navigation?
\newif\ifbeamer@theme@subsection
\beamer@theme@subsectionfalse
%\beamer@theme@subsectiontrue

% define left and right logo
\pgfdeclareimage[width=5.2em,interpolate=true]{logo-l}{theme/logo/tu_logo}
\pgfdeclareimage[width=5.2em,interpolate=true]{logo-r}{theme/logo/zih_logo_ml}

% we use tikz for the color gradient
\usepackage{tikz}

\setbeamercolor{subsection in head/foot}{parent=palette secondary}
\setbeamercolor{section in head/foot}{parent=palette primary}
\setbeamercolor{author in head/foot}{parent=palette primary}


\definecolor{zihorange}{rgb}{0.898, 0.420, 0.125}


\defbeamertemplate*{footline}{zih01 theme}
{%
  \begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
    \hfill\rule{0cm}{0.7cm}
  \end{beamercolorbox}
  % fancy color gradient, see
  % /usr/share/texmf/doc/generic/pgf/version-for-pdftex/en/pgfmanual.pdf
  \begin{tikzpicture}[x=\paperwidth,y=0.5pt]
    \shade[left color=white,right color=white] (0.0,0) rectangle (0.2,1);
    \shade[left color=darkblue,right color=zihorange] (0.2,0) rectangle (0.8,1);
%    \shade[left color=zihorange,right color=zihorange] (0.819,0) rectangle
% (0.978,1);
  \end{tikzpicture}
  % logo, page number, yet anoter logo
  \begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{author in head/foot}%
    \pgfuseimage{logo-l}
    \hfill%
    %\leavevmode{\usebeamerfont{author in head/foot}\insertshortauthor}%
    \leavevmode{\usebeamerfont{author in head/foot}\insertframenumber/\inserttotalframenumber}%
    \hfill%
    \pgfuseimage{logo-r}
  \end{beamercolorbox}%
}


\DeclareOptionBeamer{footline}{\csname beamer@theme@footline@#1\endcsname}
\DeclareOptionBeamer{subsection}[true]{\csname beamer@theme@subsection#1\endcsname}
\ProcessOptionsBeamer


\mode<presentation>

                                % Head
\defbeamertemplate*{headline}{zih01 theme}
{%
  \begin{beamercolorbox}[colsep=1.5pt]{upper separation line head}
  \end{beamercolorbox}
  % Navigation
  \ifbeamer@theme@navigation
  \begin{beamercolorbox}{section in head/foot}
    \vskip2pt\insertnavigation{\paperwidth}\vskip2pt
  \end{beamercolorbox}%
  \fi%
  % Section > Subsection
  \ifbeamer@theme@subsection%
    \begin{beamercolorbox}[colsep=1.5pt]{middle separation line head}
    \end{beamercolorbox}
    \begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
      \usebeamerfont{subsection in head/foot}\insertsectionhead\  \hfill  \insertsubsectionhead 
    \end{beamercolorbox}%
  \else%
    \begin{beamercolorbox}{subsection in head/foot}
      \rule{0cm}{0.7pt}
    \end{beamercolorbox}%
  \fi%
  \begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
  \end{beamercolorbox}
}



 % Frametitle

\defbeamertemplate*{frametitle}{zih01 theme}[1][left]
{%
  \ifbeamercolorempty[bg]{frametitle}{}{\nointerlineskip}%
  \@tempdima=\textwidth%
  \advance\@tempdima by\beamer@leftmargin%
  \advance\@tempdima by\beamer@rightmargin%
  \begin{beamercolorbox}[sep=0.3cm,#1,wd=\the\@tempdima]{frametitle}
    \usebeamerfont{frametitle}%
    \vbox{}\vskip-1ex%
    \if@tempswa\else\csname beamer@fte#1\endcsname\fi%
    \strut\hspace{3mm}\insertframetitle\strut\par%
    \vspace{-3.8mm}%
    \begin{tikzpicture}[x=\paperwidth,y=0.65pt]
      \shade[left color=white,right color=white] (0.0,0) rectangle (0.001,1);
      \shade[left color=zihorange,right color=darkblue] (0.02,0) rectangle (0.938,1);
      \shade[left color=darkblue,right color=zihorange] (0.01,3) rectangle (0.928,4);
    \end{tikzpicture}
    
    {%
      \ifx\insertframesubtitle\@empty%
      \else%
      {\usebeamerfont{framesubtitle}\usebeamercolor[fg]{framesubtitle}\hspace{3mm}\insertframesubtitle\strut\par}%
      \fi
    }%
    \vskip-1ex%
    \if@tempswa\else\vskip-.3cm\fi% set inside beamercolorbox... evil here...
  \end{beamercolorbox}%
}



\mode
<all>