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% Copyright 2007 by Till Tantau
% Copyright 2015 by Vedran Mileti\'c, Joseph Wright
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/licenses/LICENSE for more details.

\mode<presentation>

\setbeamercolor{frametitle}{parent=palette primary}

\AtBeginDocument{
  {
    \usebeamerfont*{headline}

    \usebeamercolor{normal text}
    \usebeamercolor{title in head/foot}
    \usebeamercolor{subsection in head/foot}
    \usebeamercolor{section in head/foot}
    \usebeamercolor{frametitle}

    \pgfdeclareverticalshading{beamer@treeshade}{\the\paperwidth}{%
      color(0ex)=(subsection in head/foot.bg);%
      color(2.25ex)=(subsection in head/foot.bg);%
      color(3.25ex)=(section in head/foot.bg);%
      color(5.5ex)=(section in head/foot.bg);%
      color(6.5ex)=(title in head/foot.bg);%
      color(9.25ex)=(title in head/foot.bg)%
    }
    
    \pgfdeclareverticalshading{beamer@aboveframetitle}{\the\paperwidth}{%
      color(0ex)=(frametitle.bg);%
      color(1ex)=(subsection in head/foot.bg)
    }
    
    \begingroup
      \selectcolormodel{gray} 
      \pgfdeclareverticalshading{beamer@belowframetitle}{\the\paperwidth}{%
        color(0ex)=(pgftransparent!100);%
        color(1ex)=(pgftransparent!0)
      }
      \pgfdeclarefading{beamer@belowframetitlemask}{\pgfuseshading{beamer@belowframetitle}}
    \endgroup
    
  }
}

\defbeamertemplate*{headline}{smoothtree theme}
{%
  \pgfuseshading{beamer@treeshade}%
  \vskip-0.05ex%
  \begin{beamercolorbox}[wd=\paperwidth,ht=1ex,dp=0ex]{empty}
  \begin{pgfpicture}
    \begin{pgfscope}%
      \pgfsetfillcolor{subsection in head/foot.bg}%
      \pgfpathrectangle{\pgfpoint{-.5\paperwidth}{-0.5ex}}{\pgfpoint{\paperwidth}{1ex}}%
      \pgfsetfading{beamer@belowframetitlemask}{}%
      \pgfusepath{fill}%
    \end{pgfscope}%
  \end{pgfpicture}%
  \end{beamercolorbox}%  
  \vskip-9.15ex%
  \begin{beamercolorbox}[wd=\paperwidth,ht=1.125ex,dp=1.125ex,ignorebg,%
    leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}
    \usebeamerfont{title in head/foot}\insertshorttitle
  \end{beamercolorbox}
  \begin{beamercolorbox}[wd=\paperwidth,ht=2.125ex,dp=1.125ex,ignorebg,%
    leftskip=.3cm,rightskip=.3cm plus1fil]{section in head/foot}
    \usebeamerfont{section in head/foot}%
    \hskip6pt\insertsectionhead
  \end{beamercolorbox}
  \begin{beamercolorbox}[wd=\paperwidth,ht=2.125ex,dp=1.125ex,ignorebg,%
      leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
    \usebeamerfont{subsection in head/foot}%
    \hskip12pt\insertsubsectionhead
  \end{beamercolorbox}
  \vskip-0.4ex%
}

\defbeamertemplate*{frametitle}{smoothtree theme}
{%
  \nointerlineskip%
  \vskip-0.05ex%
  \usebeamerfont{headline}%
  \begin{beamercolorbox}[wd=\paperwidth,ht=0.85ex,dp=0ex]{empty}
    \pgfuseshading{beamer@aboveframetitle}%
  \end{beamercolorbox}
  \nointerlineskip%
  \begin{beamercolorbox}[wd=\paperwidth,leftskip=.935cm,rightskip=.3cm plus1fil]{frametitle}
    \vskip-1.2ex%
    \usebeamerfont*{frametitle}\strut\insertframetitle%
      \ifx\insertframesubtitle\@empty%
        \strut\par%
      \else
        \par{\usebeamerfont*{framesubtitle}{\usebeamercolor[fg]{framesubtitle}\strut\insertframesubtitle}\strut\par}%
      \fi%%
    \usebeamerfont{headline}%
  \end{beamercolorbox}%
  \nointerlineskip
  \vskip-0.2ex%
  \begin{beamercolorbox}[wd=\paperwidth,ht=1ex,dp=0ex]{empty}
  \begin{pgfpicture}
    \begin{pgfscope}%
      \pgfsetfillcolor{frametitle.bg}%
      \pgfpathrectangle{\pgfpoint{-.5\paperwidth}{-0.5ex}}{\pgfpoint{\paperwidth}{1ex}}%
      \pgfsetfading{beamer@belowframetitlemask}{}%
      \pgfusepath{fill}%
    \end{pgfscope}%
  \end{pgfpicture}%
  \end{beamercolorbox}%  
}
  
  
\mode
<all>