beamerthemeucl.sty

\usetheme{default}
\usecolortheme{ucl}
\RequirePackage{calc}

% the height of the banner (after scaling)
\newlength\bannerheight%
% the height of the banner stripe: according to UCL style this should be the
% height of the tower
\newlength\stripeheight%
% the amount to trim off the banner (before scaling)
\newlength\bannerimagetrim%

% UCL banner template
\defbeamertemplate*{banner}{ucl}[1][1]{%
  \uclcolorname{banner.bg}{\ucl@bannercolorname}%
  \includegraphics[width=\paperwidth,trim=\bannerimagetrim{} 0 0 0]% 
  {banners/uclbanner\ucl@bannercolorname}%
}
[action]{% set lengths when loading template
  \setlength\bannerimagetrim{363bp-363bp/\real{#1}}
  \settoheight\bannerheight{\usebeamertemplate*{banner}}  
  \setlength\stripeheight{0.1875\bannerheight}
}

% blank banner, for when you don't want UCL banner on every page
\defbeamertemplate{banner}{blank}{%
  \hspace{\beamer@leftmargin}%
  \begin{beamercolorbox}[wd=\paperwidth,ht=\bannerheight]{banner}%
  \end{beamercolorbox}
}

% if you don't want a banner at all.
\defbeamertemplate{banner}{empty}{%
}



% draw the banner on the background
\defbeamertemplate*{background}{ucl}{% for everything else
  \hspace{\beamer@leftmargin}%
  \begin{beamercolorbox}[wd=\paperwidth]{banner stripe}%
    \usebeamertemplate*{banner}\par%
    \ifbeamercolorempty[bg]{banner stripe}{}{\vspace{\stripeheight}}%
  \end{beamercolorbox}%
}


% The default headline is just empty space.
% this ensures content doesn't overlap
\defbeamertemplate*{headline}{ucl}{%
  \vspace{\bannerheight}%
  \ifbeamercolorempty[bg]{banner stripe}{}{\vspace{\stripeheight}}%
}  


% Section / Subsection
\defbeamertemplate{headline}{section}{%
  \begin{beamercolorbox}[ignorebg,ht=\bannerheight]{section in head/foot}%
    \vbox to\bannerheight{ % chktex 1
      \usebeamerfont{section in head/foot}%
      \vspace{1em}%
      \hspace{1em}\insertsectionhead%
      \ifx\insertsubsectionhead\@empty%
      \else%
      {\usebeamerfont{subsection in head/foot}%
        \usebeamercolor[fg]{subsection in head/foot}%
        \,/\,\insertsubsectionhead}%
      \fi%      
      \par%
      \vfil}%
  \end{beamercolorbox}%
  \ifbeamercolorempty[bg]{banner stripe}{}{\vspace{\stripeheight}}%
}  

% Miniframes
\defbeamertemplate{headline}{miniframes}[1][0.6\paperwidth]{% 
  \begin{beamercolorbox}[ignorebg,ht=\bannerheight]{section in head/foot}%
    \vbox to\bannerheight{ % chktex 1
      \vspace{1ex}%
      \insertnavigation{#1}%
      \par%
      \vfil}%
  \end{beamercolorbox}%
  \ifbeamercolorempty[bg]{banner stripe}{}{\vspace{\stripeheight}}%
}
% use boxes instead of circles
\setbeamertemplate{mini frames}[box]

% Department and subdepartment/slogan in the headline
\defbeamertemplate{headline}{department}{%
  \begin{beamercolorbox}[ignorebg,ht=\bannerheight]{section in head/foot}%
    \vbox to\bannerheight{ % chktex 1
      \vfil%
      \usebeamerfont*{section in head/foot}%
      \usebeamercolor[fg]{section in head/foot}%
      \hspace{1em}%
      \usebeamertemplate{department}%
      \par%
      \usebeamerfont*{subsection in head/foot}%
      \usebeamercolor[fg]{subsection in head/foot}%
      \vspace*{.5ex}%
      \hspace{1em}%
      \usebeamertemplate{subdepartment}%
      \par%
      \vfil}%
  \end{beamercolorbox}%
  \ifbeamercolorempty[bg]{banner stripe}{}{\vspace{\stripeheight}}%
}

\patchcmd{\beamer@calculateheadfoot}{\advance\footheight by 4pt}{\advance\footheight by 1em}{}{} % chktex 1

\defbeamertemplate{footline}{author title date}
{
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
    \usebeamerfont{author in head/foot}\insertshortauthor\expandafter\beamer@ifempty\expandafter{\beamer@shortinstitute}{}{~~(\insertshortinstitute)}
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
    \usebeamerfont{title in head/foot}\insertshorttitle%
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
    \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
    \usebeamertemplate*{slide counter}\hspace*{2ex}
  \end{beamercolorbox}}%
  \vskip0pt%
}

% Slide counter
\defbeamertemplate*{slide counter}{frametotal}[1][]{%
  \usebeamercolor[fg]{date in head/foot}%
  #1~\insertframenumber\ \vrule width0.3pt height5pt\ \inserttotalframenumber%
}
\defbeamertemplate{slide counter}{frameonly}[1][]{%
  \usebeamercolor[fg]{date in head/foot}%
  #1~\insertframenumber%
}
\defbeamertemplate{slide counter}{empty}{%
}

% Reduce margins
\setbeamersize{text margin left=1.4em,text margin right=1.4em}

% make everything rectangle-y
\useinnertheme{rectangles}

% use the Helvetica font
\usepackage[scaled]{helvet}
\usepackage{eulervm}

%%% the UCL font is actually Arial, if you want to use it, you should install
%%% the font using the getnonfreefonts script, then it can be loaded by the
%%% following:
% \usepackage[T1]{fontenc}
% \usepackage{uarial}
% \renewcommand{\familydefault}{\sfdefault}