Some time ago I created a style to be used for slides and posters for the beamer class. I have published it on github as latex-beamertheme-ibadai. It was basically my first attempt on writing such a package, and I am looking for advice how to improve it.
It comes with some options, the most basic is shown in the preview below. Please visit the repository for more examples, as I am a bit short on space here.
I am mostly looking for advice on the main file beamerthemeMito.sty, as this is the one tying it all together. I tried to be as clear as possible, and it worked so far for my purposes, but I would like to know where I can improve it, or if I made some beginners mistakes that just work by coincidence.
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamerthemeMito}[2016/12/12]
%%%%%
% Required packages to be loaded
%
\RequirePackage{adjustbox}
\RequirePackage{etoolbox}
%%%%%
% Create toggles for options
%
\providetoggle{poster}
\providetoggle{alternativetitle}
\providetoggle{light}
%%%%%
% List options
%
\DeclareOption{beamer}{\togglefalse{poster}}
\DeclareOption{alttitle}{\toggletrue{alternativetitle}}
\DeclareOption{poster}{\toggletrue{poster}}
\DeclareOption{light}{\toggletrue{light}}
\DeclareOption{dark}{\togglefalse{light}}
\DeclareOption*{\PackageWarning{beamerthemeMito}{Unknown ‘\CurrentOption’}}
\ExecuteOptions{beamer,dark}
\ProcessOptions\relax
%%%%%
% Define a standard length based on the normal fontsize
%
\newlength{\normaltextsize}
\AtBeginDocument{\setlength{\normaltextsize}{\f@size pt}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%
% Predefined Fonts and Colours
%
% Both themes (dark/light) use the same palette,
% the difference is only that the templates for
% the title(s) switch fg and bg
\iftoggle{light}{
\usecolortheme[light]{ibadai}
}{%
\usecolortheme{ibadai}
}
% Poster uses larger fonts for title, author, etc
\iftoggle{poster}{%
\usefonttheme[poster]{ibadai}
}{%
\usefonttheme[beamer]{ibadai}
}
%%%%%
% Modify Inner theme
%
% Choose triangles for the itemize environment
% this really doesn't have much of an effect since it is redefinedi later
\setbeamertemplate{itemize items}[triangle]
% Two levels should be quite enough
\setbeamertemplate{itemize item}{\raisebox{0.12ex}{$\blacktriangleright$}\hskip0.1em}
\setbeamertemplate{itemize subitem}{\raisebox{0.12ex}{$\triangleright$}\hskip0.1em}
% There are no (should not be) sections in a poster
\iftoggle{poster}{%
}{%
\setbeamertemplate{sections/subsections in toc}[sections numbered]
% Provide additional level for itemize environment
\setbeamertemplate{itemize subsubitem}{\raisebox{0.12ex}{$\triangleright$}\hskip0.1em}
}
% enumerated figures, tables (,and schemes if defined)
\setbeamertemplate{caption}[numbered]
%%%%%
% Modify Outer theme
%
\useoutertheme{default} %fallback
% Don't use navigation symbols
\beamertemplatenavigationsymbolsempty
%%%%%
% New templates
%
% The theme doesn't use a headline on standard frames.
% Define a headline template which can be used as
% the title for a poster
\defbeamertemplate{headline}{ibadai-poster}{%
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.02\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{use=frametitle,fg=frametitle.bg.bg=frametitle.fg}%
\parbox[b][0.16\paperwidth]{0.68\paperwidth}{%
\raggedleft
{\usebeamerfont{title}\inserttitle\strut\par}%
\ifx\insertsubtitle\@empty%
\else%
{\usebeamerfont{subtitle}\insertsubtitle\strut\par}%
\fi
{\usebeamerfont{author}\usebeamercolor[fg]{author}\insertauthor\strut\par}%
\ifx\insertinstitute@empty\vfill%
\else%
{\usebeamerfont{institute}\usebeamercolor[fg]{normal text}\insertinstitute\strut\par}
\fi\vskip0ex % Ignore depth
}\hfill%
\ifx\inserttitlegraphic\@empty%
\else%\hfill%%
\adjustbox{max height=0.16\paperwidth,%
max width=0.25\paperwidth,%
keepaspectratio,valign=B}{\inserttitlegraphic}%
\fi\par
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.2\normaltextsize]{frametitle}
\end{beamercolorbox}%
}
% Define how the title for a slide is set
% This is the default for the dark theme
\defbeamertemplate{frametitle}{ibadai-frametitle}{%
\nointerlineskip
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.01\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{frametitle}%
\usebeamerfont{frametitle}\insertframetitle\strut\par
\ifx\insertframesubtitle\@empty%
\else%
{\usebeamerfont{framesubtitle}\insertframesubtitle\strut\par}%
\fi
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.1\normaltextsize]{separation line head}
\end{beamercolorbox}%
}
% Define footline as a single box for a slide
\defbeamertemplate{footline}{ibadai}{%
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.1\normaltextsize]{separation line foot}
\end{beamercolorbox}%
\nointerlineskip
\begin{beamercolorbox}%
[wd=1\paperwidth,ht=3ex,dp=1.5ex,leftskip=1em,rightskip=1em]%
{footline}%
\usebeamerfont{footline}%
\insertshortauthor{} (\insertshortinstitute)\hfill\insertframenumber/\inserttotalframenumber%
\end{beamercolorbox}%
}
% Define alternative footline as a single box
% for a title page or the poster
% Provide a command to easily insert a custom footline
\providecommand{\insertcustomfootline}{}
\providecommand{\posterfootline}[1]{\renewcommand{\insertcustomfootline}{#1}}
\defbeamertemplate{footline}{ibadai-poster}{%
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.2\normaltextsize]{separation line foot}
\end{beamercolorbox}%
\nointerlineskip
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.01\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{footline}
\usebeamerfont{footline}%
\ifx\insertcustomfootline\@empty%
\ifx\insertdate\@empty\today%
\else\insertdate\fi%
\hfill\LaTeX
\else%
\insertcustomfootline%
\fi
\end{beamercolorbox}%
\nointerlineskip
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.2\normaltextsize]{separation line foot}
\end{beamercolorbox}%
}
% Redefine Titlepage
%
% Make a titlepage
\def\maketitle{%
\ifbeamer@inframe\titlepage%
\else%
\frame[plain]\titlepage
\fi
}
\defbeamertemplate{title page}{ibadai-titlepage}
{
%\vskip0pt
\usebeamerfont{normal text}%
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.1\normaltextsize]{separation line head}
\end{beamercolorbox}%
\nointerlineskip
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.04\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{title}%
{\usebeamerfont{title}\inserttitle\strut\par}%
\ifx\insertsubtitle\@empty%
\else%
{\usebeamerfont{subtitle}\insertsubtitle\strut\par}%
\fi
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.1\normaltextsize]{separation line head}
\end{beamercolorbox}%
\vspace{0.2\paperheight}
\parbox[b][0.25\paperheight]{0.5\textwidth}{%
{\usebeamerfont{author}\usebeamercolor[fg]{author}\insertauthor\strut\par}
\ifx\insertinstitute@empty\vfill%
\else%
{\usebeamerfont{institute}\usebeamercolor[fg]{normal text}\insertinstitute\strut\par}
\fi\vfill
\ifx\insertdate@empty%
{\usebeamerfont{date}\usebeamercolor[fg]{normal text}\today}\strut\par
\else%
{\usebeamerfont{date}\usebeamercolor[fg]{normal text}\insertdate}\strut\par
\fi
}\hfill%
\ifx\inserttitlegraphic@empty\null%
\else%
\adjustbox{max height=0.25\paperheight,%
max width=0.25\textwidth,%
keepaspectratio,valign=B}{\inserttitlegraphic}%
\fi\par
}
% Define an alternative layout for the titlepage
% Custom content on the alternative titlepage is available through:
\newcommand{\inserttitlepageextra}{}
\newcommand{\titlepageextra}[1]{\renewcommand{\inserttitlepageextra}{#1}}
\defbeamertemplate{title page}{ibadai-alt-titlepage}{%
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.02\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{use=frametitle,fg=frametitle.bg.bg=frametitle.fg}%
\parbox[b][0.16\paperwidth]{0.68\paperwidth}{%
\raggedleft
{\usebeamerfont{title}\inserttitle\strut\par}%
\ifx\insertsubtitle\@empty%
\else%
{\usebeamerfont{subtitle}\insertsubtitle\strut\par}%
\fi
{\usebeamerfont{author}\usebeamercolor[fg]{author}\insertauthor\strut\par}%
\ifx\insertinstitute@empty\vfill%
\else%
{\usebeamerfont{institute}\usebeamercolor[fg]{normal text}\insertinstitute\strut\par}
\fi\vskip0ex % Ignore depth
}\hfill%
\ifx\inserttitlegraphic\@empty%
\else%\hfill%%
\adjustbox{max height=0.16\paperwidth,%
max width=0.25\paperwidth,%
keepaspectratio,valign=B}{\inserttitlegraphic}%
\fi\par
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.2\normaltextsize]{separation line head}
\end{beamercolorbox}
\vskip0pt plus 1filll
\begin{centering}
\inserttitlepageextra\strut\par
\end{centering}
\vskip0pt plus 1filll
\begin{beamercolorbox}[wd=1\paperwidth,ht=0.1\normaltextsize]{separation line foot}
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}%
[wd=1\paperwidth,sep=0.01\paperwidth,
leftskip=0.01\paperwidth,rightskip=0.01\paperwidth]%
{footline}%
\usebeamerfont{footline}%
\ifx\insertcustomfootline\@empty%
\ifx\insertdate\@empty\today%
\else\insertdate\fi%
\hfill\LaTeX
\else%
\insertcustomfootline%
\fi
\end{beamercolorbox}%
}
%%%%%
% Define some boxed environments
%
% Provide a new length to know the actual available width
%
\newlength{\boxwidth}
%%%
% The different boxes only differ in color,
% the actual code for the boxes should be recycleable.
% The default is the dark theme defined below
\providecommand{\blockbegin@ibadai@default}[2]{%
\begin{minipage}{\linewidth}
% \begin{beamercolorbox}[ht=0.1\normaltextsize]{test}
% \end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[leftskip=0.3\normaltextsize,
colsep=0.2\normaltextsize
]{#1}%
{\usebeamerfont*{#1}\insertblocktitle\strut\par}
\end{beamercolorbox}
% \nointerlineskip
% \begin{beamercolorbox}[ht=0.1\normaltextsize]{test}
% \end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[leftskip=0.5\normaltextsize,
rightskip=0.5\normaltextsize,
colsep=0.2\normaltextsize,
sep=0.5\normaltextsize,
vmode
]{#2}%
\usebeamerfont{#2}%
\setlength{\boxwidth}{\linewidth}
\addtolength{\boxwidth}{-\leftskip}
\addtolength{\boxwidth}{-\rightskip}
}
\providecommand{\blockend@ibadai@default}[1]{%
\end{beamercolorbox}%
\nointerlineskip
\begin{beamercolorbox}[ht=0.1\normaltextsize]{#1}
\end{beamercolorbox}
\end{minipage}\par
}
%
\setbeamercolor{test}{fg=yellow,bg=black}
% The light theme uses:
\providecommand{\blockbegin@ibadai@light}[2]{%
\begin{minipage}{\linewidth}
\begin{beamercolorbox}[ht=0.1\normaltextsize]{#1}
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[leftskip=0.3\normaltextsize,
colsep=0.2\normaltextsize
]{#2}%
{\usebeamercolor[bg]{#1}\usebeamerfont*{#2}\insertblocktitle\strut\par}
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[ht=0.1\normaltextsize]{#1}
\end{beamercolorbox}
\nointerlineskip
\begin{beamercolorbox}[leftskip=0.5\normaltextsize,
rightskip=0.5\normaltextsize,
colsep=0.2\normaltextsize,
sep=0.5\normaltextsize,
vmode
]{#2}%
\usebeamerfont{#2}%
\setlength{\boxwidth}{\linewidth}
\addtolength{\boxwidth}{-\leftskip}
\addtolength{\boxwidth}{-\rightskip}
}
% The end definitions are the same as the defaults
%%%
% Define a standard block for the dark theme
%
% Ordinary blocks
\defbeamertemplate{block begin}{ibadai-block-dark}{%
\blockbegin@ibadai@default{block title}{block body}
}
\defbeamertemplate{block end}{ibadai-block-dark}{%
\blockend@ibadai@default{block title}
}
%
% Alerted blocks
\defbeamertemplate{block alerted begin}{ibadai-block-dark}{%
\blockbegin@ibadai@default{block title alerted}{block body alerted}
}
\defbeamertemplate{block alerted end}{ibadai-block-dark}{%
\blockend@ibadai@default{block title alerted}
}
%
% Example Blocks
\defbeamertemplate{block example begin}{ibadai-block-dark}{%
\blockbegin@ibadai@default{block title example}{block body}
}
\defbeamertemplate{block example end}{ibadai-block-dark}{%
\blockend@ibadai@default{block title example}
}
%
%%%
% Define a block for the poster theme
%
\defbeamertemplate{block begin}{ibadai-block-poster}{%
\blockbegin@ibadai@default{block title}{block body}
\begin{minipage}{1\boxwidth}
}
\defbeamertemplate{block end}{ibadai-block-poster}{%
\end{minipage}
\blockend@ibadai@default{block title alerted}
\vskip0.5\normaltextsize plus 1fil
}
%%%
% Define a standard block for the light theme
%
% Ordinary blocks
\defbeamertemplate{block begin}{ibadai-block-light}{%
\blockbegin@ibadai@light{block title}{block body}
}
\defbeamertemplate{block end}{ibadai-block-light}{%
\blockend@ibadai@default{block title}
}
%
% Alerted blocks
\defbeamertemplate{block alerted begin}{ibadai-block-light}{%
\blockbegin@ibadai@light{block title alerted}{block body}
}
\defbeamertemplate{block alerted end}{ibadai-block-light}{%
\blockend@ibadai@default{block title alerted}
}
%
% Example Blocks
\defbeamertemplate{block example begin}{ibadai-block-light}{%
\blockbegin@ibadai@light{block title example}{block body}
}
\defbeamertemplate{block example end}{ibadai-block-light}{%
\blockend@ibadai@default{block title example}
}
%
%%%%%
% Set the values according to the requested switch
%
\iftoggle{alternativetitle}{%
\setbeamertemplate{title page}[ibadai-alt-titlepage]
}{%
\setbeamertemplate{title page}[ibadai-titlepage]
}
\iftoggle{light}{
\setbeamertemplate{blocks}[ibadai-block-light]
}{%
\setbeamertemplate{blocks}[ibadai-block-dark]
}
% As a default, use empty headline for the presentation
% or the poster-template
\iftoggle{poster}{%
\setbeamertemplate{headline}[ibadai-poster]
\setbeamertemplate{footline}[ibadai-poster]
\setbeamertemplate{frametitle}{}
\setbeamertemplate{blocks}[ibadai-block-poster]
\setbeamertemplate{bibliography item}[text]
}{%
\setbeamertemplate{headline}[default]
\setbeamertemplate{footline}[ibadai]
\setbeamertemplate{frametitle}[ibadai-frametitle]
}
\mode
<all>
Accompanying this is the colourtheme beamercolorthemeibadai.sty, which defines which colours to use when:
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamercolorthemeibadai}[2016/12/12]
%%%%%
% Required packages to be loaded
%
\RequirePackage{xcolor}
\RequirePackage{etoolbox}
%%%%%
% Create toggles for options
%
\providetoggle{light}
%%%%%
% List options
%
\DeclareOption{light}{\toggletrue{light}}
\DeclareOption{dark}{\togglefalse{light}}
\DeclareOption{poster}{\togglefalse{light}}
\DeclareOption*{\PackageWarning{beamerthemeMito}{Unknown ‘\CurrentOption’}}
\ExecuteOptions{dark}
\ProcessOptions\relax
%%%%%
% Define colours
%
\definecolor{IbadaiGreen} {RGB}{002, 068, 030}
\definecolor{IbadaiRed} {RGB}{176, 000, 038}
\definecolor{IbBackgdGrey} {RGB}{144, 144, 136}
\definecolor{IbBackgdWhite}{RGB}{244, 244, 236}
\definecolor{IbLgtGreen} {RGB}{047, 139, 011}
\definecolor{IbDrkGreen} {RGB}{024, 083, 011}
%\definecolor{IbTemplate} {RGB}{000, 000, 000}
\usecolortheme{default} %fallback
%%%%%
% Define colours for palettes if used with different theme
%
\setbeamercolor*{normal text}{fg=IbadaiGreen,bg=IbBackgdWhite!50!white}
\setbeamercolor*{structure}{fg=IbadaiRed}
\setbeamercolor*{alerted text}{use=structure,fg=structure.fg,bg=IbBackgdWhite}
\setbeamercolor*{example text}{fg=IbLgtGreen,bg=IbBackgdWhite}
\setbeamercolor*{palette primary}{fg=IbBackgdWhite,bg=IbadaiGreen!70!IbBackgdWhite}
\setbeamercolor*{palette secondary}{fg=IbBackgdWhite,bg=IbadaiGreen!80!IbBackgdWhite}
\setbeamercolor*{palette tertiary}{fg=IbBackgdWhite,bg=IbadaiGreen!90!IbBackgdWhite}
\setbeamercolor*{palette quaternary}{fg=IbBackgdWhite,bg=IbadaiGreen}
\setbeamercolor{section in toc}{fg=IbadaiGreen,bg=IbBackgdWhite}
\setbeamercolor{item}{use=structure,fg=structure.fg}
\setbeamercolor{author}{use=structure,fg=structure.fg}
\setbeamercolor*{separation line}{use=structure,bg=structure.fg}
% Define colours for titles, they change according to used option
\iftoggle{light}{%
\setbeamercolor{titlelike}{bg=IbBackgdWhite,fg=IbadaiGreen}
\setbeamercolor*{separation line head}{bg=IbadaiGreen}
}{%
\setbeamercolor{titlelike}{parent=palette quaternary}
\setbeamercolor*{separation line head}{parent=separation line}
}
\setbeamercolor*{separation line foot}{parent=separation line}
\setbeamercolor{block title}{parent=palette quaternary}
\setbeamercolor{block body}{parent=normal text, use=block title, bg=block title.fg}
\setbeamercolor{block title alerted}{use=structure,fg=IbBackgdWhite,bg=structure.fg}
\setbeamercolor{block body alerted}{parent=normal text, use=block title alerted, bg=block title alerted.fg!95!block title alerted.bg}
\setbeamercolor{block title example}{use=example text,fg=example text.bg,bg=example text.fg}
\setbeamercolor{block body example}{parent=normal text, use=block title example, bg=block title example.fg!95!block title example.bg}
\setbeamercolor{footline}{parent=palette quaternary}
The last file necessary is the font theme defined in beamerfontthemeibadai.sty:
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamerfontthemeibadai}[2016/12/12]
\RequirePackage{etoolbox}
\providetoggle{poster}
\DeclareOption{beamer}{\togglefalse{poster}}
\DeclareOption{poster}{\toggletrue{poster}}
\DeclareOption*{\PackageWarning{beamerthemeMito}{Unknown ‘\CurrentOption’}}
\ProcessOptions\relax
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\usefonttheme{default} %fallback
\iftoggle{poster}{%
\def\familydefault{\rmdefault}
\def\mathfamilydefault{\rmdefault}
\setbeamerfont*{title}{size=\huge,series=\bfseries,family=\sffamily}
\setbeamerfont*{subtitle}{parent=title,size=\Large,series=\mdseries}
\setbeamerfont{author}{parent=title,size=\large}
\setbeamerfont{institute}{parent=title,size=\large,series=\mdseries}
\setbeamerfont{date}{parent=title,size=\normalsize,series=\mdseries}
\setbeamerfont{block title}{parent=title,size=\normalsize}
\setbeamerfont{block title alerted}{parent=block title}
\setbeamerfont{caption}{size=\normalsize,series=\mdseries,family=\sffamily}
\setbeamerfont{caption name}{parent=caption,series=\bfseries}
\setbeamerfont*{footline}{family=\ttfamily,series=\mdseries,size=\normalsize}
\linespread{1.05}
}{%
\setbeamerfont*{title}{size=\Large,series=\bfseries}
\setbeamerfont*{subtitle}{size=\large}
\setbeamerfont{author}{size=\normalsize,series=\bfseries}
\setbeamerfont{institute}{size=\normalsize}
\setbeamerfont{date}{size=\small}
\setbeamerfont{section title}{size=\Large}
\setbeamerfont{block title}{size=\normalsize}
\setbeamerfont{block title alerted}{size=\normalsize}
\setbeamerfont{block title example}{size=\normalsize}
\setbeamerfont{subtitle}{size=\small}
\setbeamerfont{frametitle}{size=\large}
\setbeamerfont{caption}{size=\small}
\setbeamerfont{caption name}{series=\bfseries}
\setbeamerfont{footline}{series=\tt}
\linespread{1.15}
}
I have oriented myself on the the general setup of the other themes that come with the beamer class.
The above preview can be produced with the following minimal working example:
\documentclass[10pt]{beamer}
\usetheme{Mito}
\title{Short and Catchy Title}
\subtitle{Long and boring subtitle with unnecessary explanations.}
\author[F. Bar]{Foo Bar}
\institute[Baz Inst.]{Baz Insititute}
\titlegraphic{\includegraphics[scale=2]{example-image-a}}
% example-image from https://www.ctan.org/pkg/mwe
\date{the Internet, \today}
\begin{document}
\frame[plain]{\titlepage}
\begin{frame}[t]
\frametitle{Catchy Slide Title}
\framesubtitle{Boring subtitle}
\begin{columns}[T]
\column{0.49\textwidth}
\begin{block}{Normal Block}
Sampletext
\end{block}
\column{0.49\textwidth}
\begin{alertblock}{Alerted Block}
Sampletext
\end{alertblock}
\end{columns}
\end{frame}
\end{document}
