beamerthemeC2SM.sty

%% ============================================================ %%
%%           Theme for the ETH Zürich C2SM group                %%
%%                   by Matthieu Leclair                        %%
%% ============================================================ %%
\RequirePackage{xcolor}

% General settings
% ================
% Create \if@doDarkMode macro
\newif\if@doDarkMode
\@doDarkModefalse
\DeclareOption{darkmode}{\@doDarkModetrue}
\ProcessOptions

\mode<presentation>
\usefonttheme{professionalfonts}
\mode
<all>

% Define palette
% ==============
% Define colors in Hsb mode
\definecolor{darkgrayHsb}{Hsb}{195,0.15,0.21}
\definecolor{lightgrayHsb}{Hsb}{60,0.01,0.93}
\definecolor{petrolHsb}{Hsb}{191,1,0.59}
\if@doDarkMode
    \definecolor{redHsb}{Hsb}{0,0.5,1}
    \definecolor{blueHsb}{Hsb}{211,0.4,1}
    \definecolor{greenHsb}{Hsb}{90,0.4,0.9}
    \definecolor{orangeHsb}{Hsb}{36,0.6,1}
    \definecolor{yellowHsb}{Hsb}{53,0.6,1}
    \definecolor{plumHsb}{Hsb}{307,0.27,0.8}
    \definecolor{cyanHsb}{Hsb}{187,0.6,1}
    \definecolor{beigeHsb}{Hsb}{37,0.5,1}
\else
    \definecolor{redHsb}{Hsb}{0,1,0.64}
    \definecolor{blueHsb}{Hsb}{211,0.8,0.64}
    \definecolor{greenHsb}{Hsb}{90,1,0.6}
    \definecolor{orangeHsb}{Hsb}{36,1,0.8}
    \definecolor{yellowHsb}{Hsb}{53,1,0.8}
    \definecolor{plumHsb}{Hsb}{307,0.5,0.5}
    \definecolor{cyanHsb}{Hsb}{191,1,0.59}
    \definecolor{beigeHsb}{Hsb}{37,1,0.6}
\fi
% translate to rgb for further use
\colorlet{darkgray}[rgb]{darkgrayHsb}
\colorlet{lightgray}[rgb]{lightgrayHsb}
\colorlet{petrol}[rgb]{petrolHsb}
\colorlet{red}[rgb]{redHsb}
\colorlet{blue}[rgb]{blueHsb}
\colorlet{green}[rgb]{greenHsb}
\colorlet{orange}[rgb]{orangeHsb}
\colorlet{yellow}[rgb]{yellowHsb}
\colorlet{plum}[rgb]{plumHsb}
\colorlet{cyan}[rgb]{cyanHsb}
\colorlet{beige}[rgb]{beigeHsb}


% Structure colors
% ================
\if@doDarkMode
    \definecolor{structBlueHsb}{Hsb}{211,0.5,0.9}
    \colorlet{structBlue}[rgb]{structBlueHsb}

    \colorlet{struct}{blue}
    \colorlet{bg_color}{darkgray}
    \colorlet{fg_color}{lightgray}
    \colorlet{example}{green}
    \colorlet{alert}{orange}
    \def\C2SMLogo{./Graphics/C2SM_logo_blue.pdf}
    \def\ETHLogo{./Graphics/eth_logo_kurz_pos_crop_light.pdf}
    \def\TitleBG{./Graphics/background_title_page_dark.png}
\else
    \definecolor{redHsb}{Hsb}{0,1,0.8}
    \definecolor{blueHsb}{Hsb}{211,0.8,0.64}
    \definecolor{greenHsb}{Hsb}{90,1,0.6}
    \definecolor{orangeHsb}{Hsb}{36,1,0.8}
    \definecolor{yellowHsb}{Hsb}{53,1,0.8}

    \colorlet{struct}{cyan}
    \colorlet{bg_color}{lightgray}
    \colorlet{fg_color}{darkgray}
    \colorlet{example}{beige}
    \colorlet{alert}{red}
    \def\C2SMLogo{./Graphics/C2SM_logo_cyan.pdf}
    \def\ETHLogo{./Graphics/eth_logo_kurz_pos_crop_dark.pdf}
    \def\TitleBG{./Graphics/background_title_page_light.png}
\fi

\colorlet{block}{struct}
\colorlet{url}{struct}
\setbeamercolor{structure}{fg=struct, bg=bg_color}
\setbeamercolor{title}{fg=bg_color, bg=struct}

\setbeamercolor{part title}{fg=struct, bg=bg_color}
\setbeamercolor{normal text}{fg=fg_color,bg=bg_color}
\setbeamercolor{alerted text}{fg=alert}

% Frame title
% ===========
\setbeamercolor{frametitle}{fg=struct, bg=bg_color}
\setbeamerfont{frametitle}{size=\Large\bfseries}
\setbeamertemplate{frametitle}{%
    \vskip6pt
    \usebeamerfont{frametitle}\insertframetitle\strut%
    \vskip.01\baselineskip%
    \leaders\vrule width \textwidth\vskip0.4pt%
    \vskip0pt%
    \nointerlineskip
}

% Table of content
% ================
\defbeamertemplate{section in toc}{bigcircle}
{\leavevmode\leftskip=2ex%
  \llap{%
    \usebeamerfont*{section number projected}%
    \usebeamercolor{section number projected}%
    \begin{pgfpicture}{-1ex}{0.25ex}{1ex}{2ex}
      \color{bg}
      \pgfpathcircle{\pgfpoint{0pt}{1.25ex}}{2.5ex}
      \pgfusepath{fill}
      \pgftext[base]{\color{fg}\large\inserttocsectionnumber}
    \end{pgfpicture}\kern3.5ex%
  }%
  \inserttocsection\par}

% \defbeamertemplate{subsection in toc}{bigcircle}
% {\leavevmode\leftskip=2em\inserttocsubsection\par}
\defbeamertemplate{subsection in toc}{bigcircle}
{\leavevmode\leftskip=2em
  \llap{%
    \usebeamerfont*{section number projected}%
    \usebeamercolor{section number projected}%
    \begin{pgfpicture}{-1ex}{0.25ex}{1ex}{2ex}
      \color{bg}
      \pgfpathcircle{\pgfpoint{6pt}{1.25ex}}{1ex}
      \pgfusepath{fill}
    \end{pgfpicture}\kern3.5ex%
  }%
  \inserttocsubsection\par}

\setbeamercolor{section in toc}{fg=fg_color,bg=bg_color}
\setbeamercolor{subsection in toc}{fg=darkgray}
\setbeamertemplate{section in toc}[bigcircle]
\setbeamertemplate{subsection in toc}[bigcircle]


% Itemize environment
% ===================
\setbeamertemplate{items}[square]
\setbeamertemplate{enumerate items}[circle]
\setbeamercolor{itemize item}{fg=structure.fg}
\setbeamercolor{itemize subitem}{fg=structure.fg}
\setbeamercolor{itemize subsubitem}{fg=structure.fg}
\setbeamercolor{item projected}{bg=structure.fg, fg=bg_color}
\setbeamercolor{enumerate item}{fg=structure.fg}
\setbeamercolor{enumerate subitem}{fg=structure.fg}
\setbeamercolor{enumerate subsubitem}{fg=structure.fg}


% Block settings
% ==============
\setbeamertemplate{blocks}[shadow=false]
% Normal blocks
\setbeamercolor{block title}{fg=bg_color,bg=block}
\setbeamerfont{block title}{series=\bfseries}
\setbeamercolor{block body}{parent=normal text,use=block title,bg=block title.bg!20!bg}
\addtobeamertemplate{block begin}{}{
  \setbeamercolor{itemize item}{fg=block}
  \setbeamercolor{itemize subitem}{fg=block}
  \setbeamercolor{itemize subsubitem}{fg=block}
  \setbeamercolor{item projected}{bg=block}
  \setbeamercolor{enumerate item}{fg=block}
  \setbeamercolor{enumerate subitem}{fg=block}
  \setbeamercolor{enumerate subsubitem}{fg=block}
  \setbeamercolor{description item}{fg=block}
}{}
% Alert blocks
\setbeamercolor{block title alerted}{fg=bg_color,bg=alert}
\setbeamercolor{block body alerted}{parent=normal text,use=block title alerted,bg=block title alerted.bg!20!bg}
\addtobeamertemplate{block alerted begin}{}{
  \setbeamercolor{itemize item}{fg=alert}
  \setbeamercolor{itemize subitem}{fg=alert}
  \setbeamercolor{itemize subsubitem}{fg=alert}
  \setbeamercolor{item projected}{bg=alert}
  \setbeamercolor{enumerate item}{fg=alert}
  \setbeamercolor{enumerate subitem}{fg=alert}
  \setbeamercolor{enumerate subsubitem}{fg=alert}
  \setbeamercolor{description item}{fg=alert}
}{}
% Example blocks
\setbeamercolor{block title example}{use=example text,fg=bg_color,bg=example}
\setbeamercolor{block body example}{parent=normal text,use=block title example,bg=block title example.bg!20!bg}
\addtobeamertemplate{block example begin}{}{
  \setbeamercolor{itemize item}{fg=example}
  \setbeamercolor{itemize subitem}{fg=example}
  \setbeamercolor{itemize subsubitem}{fg=example}
  \setbeamercolor{item projected}{bg=example}
  \setbeamercolor{enumerate item}{fg=example}
  \setbeamercolor{enumerate subitem}{fg=example}
  \setbeamercolor{enumerate subsubitem}{fg=example}
  \setbeamercolor{description item}{fg=example}
}{}

% Background
% ==========
% Set frame background color
\setbeamercolor{background canvas}{bg=bg_color}

% Set background picture
\setbeamertemplate{background}{
  \ifnum\c@framenumber=1
  % Clouds picture on title page (frame number 1)
  \vbox to \paperheight{
    \vfil
    \hbox to \paperwidth{
      \hspace{0.05\paperwidth}
      \includegraphics[width=0.15\paperwidth]{\ETHLogo}
      \hfill
      \small Center for Climate Systems Modeling C2SM
      \hspace{0.055\paperwidth}}
    \vfil
    \hbox to \paperwidth{
      \hfil
      \includegraphics[trim=10cm 0cm 0cm 0cm,clip=true,height=0.722\paperheight]{\TitleBG}
      \hfil}
    \vfil}
  \else
  % C2SM logo and ETHZ logo + C2SM acronym on other slides
  \vbox to \paperheight{
    \vspace{0.02\paperheight}
    \hbox to \paperwidth{
      \hfil
      \includegraphics[height=0.08\paperheight]{\C2SMLogo}
      \hspace{0.055\paperwidth}}
    \vfil
    \hbox to \paperwidth{
      \hspace{0.048\paperwidth}
      \includegraphics[width=.12\paperwidth]{\ETHLogo}
      \hspace{0.03\textwidth}
      \tiny Center for Climate Systems Modeling C2SM
      \hspace{0.35\textwidth}
      \hfil
      \tiny\mydatefootnote
      \hspace{0.2\paperwidth}
    \vspace{0.02\paperheight}}}
  \fi
}

% Title page
% ==========
% Set title page font
\setbeamerfont{title}{size=\Large, series=\bfseries}
\setbeamerfont{part title}{size=\Large, series=\bfseries}
\setbeamerfont{subtitle}{size=\large, series=\bfseries}
\setbeamerfont{author}{size=\normalsize, series=\mdseries}
\setbeamerfont{date}{size=\normalsize, series=\mdseries}

% Set title page template
\setbeamertemplate{title page}{
  \begingroup
  \pgfsetfillopacity{0.95}
  \vbox to \paperheight{
    \vfil
    \vfil
    \hbox to \paperwidth{
      \hspace{\dimexpr -\beamer@leftmargin-0.27cm\relax}
      \begin{beamercolorbox}[wd=.65\paperwidth,sep=8pt,colsep=-4bp,rounded=false,shadow=false]{title}
        \usebeamerfont{title}\inserttitle\par%
        \ifx\insertsubtitle\@empty%
        \else%
        \vskip0.25em%
        {\usebeamerfont{subtitle}\usebeamercolor[fg]{subtitle}\insertsubtitle\par}%
        \fi%
        \vskip1em\par
        \usebeamerfont{author}\insertauthor
        \vskip1em\par
        \usebeamerfont{date}\insertdate
      \end{beamercolorbox}
      \hfil}
    \vskip0.5em
    \vfil
  }
  \endgroup
}

\def\currentdate{\leavevmode\hbox{\the\year-\twodigits\month-\twodigits\day}}
\def\twodigits#1{\ifnum#1<10 0\fi\the#1}

% Head line
% =========
% % Remove headline
% \setbeamertemplate{headline}{}

% Foot line
% =========
% Purge navigation symbols
\setbeamertemplate{navigation symbols}{}
% Add page number to navigation symbols
\setbeamercolor{footline}{fg=fg_color}
\addtobeamertemplate{navigation symbols}{}{
  \usebeamerfont{footline}
  \usebeamercolor[fg]{footline}
  \ifnum \value{page} > 1
    \insertframenumber{} / \inserttotalframenumber
    \hspace{0.055\paperwidth}
    \vspace{0.015\paperheight}
  \fi
}

% Part page
% ============
\AtBeginPart{
  \begin{frame}
      \centering
      {\usebeamerfont{part title}\usebeamercolor{part title}\insertpart\par}%
  \end{frame}
}