[Tex/LaTex] beamerposter custom style with keyval definition

beamerposterkey-valuepackage-optionspackage-writing

I'm creating a beamerposter style accordingly to my department specification. I would like to create a theme where the definitions of the blocks can vary accordingly to a keyword in the calling of the theme. I'm trying to explain with a MWE
The custom style works like this

\ProvidesPackage{beamerthemeMYposter} % this style was created by David Vilar
% Define boolean options
% -----------------
\newif\if@shadowbox
\DeclareOption{shadowbox}{\@shadowboxtrue}
\DeclareOption*{\PackageWarning{beamerthemeMYposter}{Unknown option `\CurrentOption'}}
% process options
% ------------
\ProcessOptions
\mode<presentation>
\usepackage{tikz}       % for drawing the nice rounded boxes 
\usetikzlibrary{arrows,backgrounds}
\newcommand{\makeruleinbox}{{\usebeamercolor[bg]{block alerted title}\centering\hspace*{-0.7cm}\rule{\inboxrule}{0.5cm}}}
\usepackage{ragged2e} 
\newlength{\inboxwd}
\newlength{\iinboxwd}
\newlength{\inboxrule}
\makeatletter  
\makeatother
\usepackage{xcolor}

% Block definition
\setbeamercolor*{block body}{fg=blue,bg=white}
\setbeamerfont{block title}{size=\large,series=\bf}
% conditional block body definition
\if@shadowbox
\setbeamercolor*{block title}{bg=white,fg=red}
\setbeamercolor*{block body}{fg=blue, bg=white}
\setbeamerfont{block title}{size=\large,series=\bf}
\setbeamertemplate{block begin}
{
  \par\vskip\medskipamount
  \begin{beamercolorbox}[colsep*=.5ex,dp={2ex},center]{block title}
    \vskip-0.25cm
    \usebeamerfont{block title}\large\insertblocktitle
    \begin{flushleft}
      \vskip-1cm
      \begin{tikzpicture}[remember picture,overlay]
        \shade [inner color=blue,outer color=white]
        (0,0) rectangle (\textwidth,0.3cm);
      \end{tikzpicture}
    \end{flushleft}
  \end{beamercolorbox}
  {\parskip0pt\par}
  \ifbeamercolorempty[bg]{block title}
  {}
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}
  \usebeamerfont{block body}
  \vskip-0.5cm
  \begin{beamercolorbox}[colsep*=.5ex,vmode]{block body}
    \justifying
  }

  \setbeamertemplate{block end}
  {
  \end{beamercolorbox}
  \vskip\smallskipamount
  }
\else
\setbeamercolor*{block title}{bg=blue,fg=white}
\setbeamertemplate{block begin}{
\vskip.75ex
\begin{beamercolorbox}[leftskip=1cm,colsep*=.75ex]{block title}%
\usebeamerfont*{block title}\insertblocktitle
\end{beamercolorbox}%
{\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
\usebeamerfont{block body}%
\begin{beamercolorbox}[colsep*=.75ex,sep=.75ex,vmode]{block body}%
\ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{}%
}
\setbeamertemplate{block end}{
\end{beamercolorbox}
}
\fi

\mode<all>

Then in the document I'm trying to call like that

\documentclass[final]{beamer}
\mode<presentation> {
\usepackage[size=a0,orientation=landscape,debug]{beamerposter}  % e.g. custom size poster
\usetheme[shadowbox]{MYposter}
}
\begin{document}
\begin{frame}{} 
\begin{block}{trial}
\end{block}
\end{frame}
\end{document}

If you try this MWE you can see that there is no way the option shadowbox is considered. I must admit this is my first attempt to use conditional keyword in package creation. Any suggestion is welcomed

Best Answer

Delete the \makeatletter, \makeatother commands from beamerthemeMYposter.sty:

\ProvidesPackage{beamerthemeMYposter} % this style was created by David Vilar
% Define boolean options
% -----------------
\newif\if@shadowbox
\DeclareOption{shadowbox}{\@shadowboxtrue}
\DeclareOption*{\PackageWarning{beamerthemeMYposter}{Unknown option `\CurrentOption'}}
% process options
% ------------
\ProcessOptions\relax
\mode<presentation>
\usepackage{tikz}       % for drawing the nice rounded boxes 
\usetikzlibrary{arrows,backgrounds}
\newcommand{\makeruleinbox}{{\usebeamercolor[bg]{block alerted title}\centering\hspace*{-0.7cm}\rule{\inboxrule}{0.5cm}}}
\usepackage{ragged2e} 
\newlength{\inboxwd}
\newlength{\iinboxwd}
\newlength{\inboxrule}

\usepackage{xcolor}

% Block definition
\setbeamercolor*{block body}{fg=blue,bg=white}
\setbeamerfont{block title}{size=\large,series=\bf}
% conditional block body definition
\if@shadowbox
\setbeamercolor*{block title}{bg=white,fg=red}
\setbeamercolor*{block body}{fg=blue, bg=white}
\setbeamerfont{block title}{size=\large,series=\bf}
\setbeamertemplate{block begin}
{
  \par\vskip\medskipamount
  \begin{beamercolorbox}[colsep*=.5ex,dp={2ex},center]{block title}
    \vskip-0.25cm
    \usebeamerfont{block title}\large\insertblocktitle
    \begin{flushleft}
      \vskip-1cm
      \begin{tikzpicture}[remember picture,overlay]
        \shade [inner color=blue,outer color=white]
        (0,0) rectangle (\textwidth,0.3cm);
      \end{tikzpicture}
    \end{flushleft}
  \end{beamercolorbox}
  {\parskip0pt\par}
  \ifbeamercolorempty[bg]{block title}
  {}
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}
  \usebeamerfont{block body}
  \vskip-0.5cm
  \begin{beamercolorbox}[colsep*=.5ex,vmode]{block body}
    \justifying
  }

  \setbeamertemplate{block end}
  {
  \end{beamercolorbox}
  \vskip\smallskipamount
  }
\else
\setbeamercolor*{block title}{bg=blue,fg=white}
\setbeamertemplate{block begin}{
\vskip.75ex
\begin{beamercolorbox}[leftskip=1cm,colsep*=.75ex]{block title}%
\usebeamerfont*{block title}\insertblocktitle
\end{beamercolorbox}%
{\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
\usebeamerfont{block body}%
\begin{beamercolorbox}[colsep*=.75ex,sep=.75ex,vmode]{block body}%
\ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{}%
}
\setbeamertemplate{block end}{
\end{beamercolorbox}
}
\fi

\mode<all>

When using \ProcessOptions, it's a good idea to use \relax at the end to stop searching for a star.

Related Solutions

[Tex/LaTex] The definition of key default value by keyval package

"Why" answers are always hard to answer, especially decades after the fact. I think that the original motivating examples that I was trying to pull into a common key-value system included cases where the "default" action didn't correspond directly to passing a value to a key, invoking a separate ..@default command name means that the default case can be defined to do essentially anything.

[Tex/LaTex] beamerposter passing portrait options to custom theme

The command \ifportrait detects the value of orientation. So you can replace your line

\parbox{\textwidth}{\includegraphics[width=\paperwidth]{poster-banner}}

with a test and appropriate code for each case

\ifportrait 
  \parbox{\textwidth}{\includegraphics[width=\textwidth]{poster-banner}}
\else
  \parbox{\textwidth}{\includegraphics[width=\textwidth,height=10cm]{poster-banner}}
\fi

The format is \ifportrait <portait-case> \else <landscape-case> \fi. I have made a random choice of a height of 10cm in the landscape case, you will need to write something appropriate four your particular case. For example, you might find a minipage more suitable than a \parbox and could write

\begin{minipage}{\textwidth}
   \centering\includegraphics[width=0.5\textwidth]{poster-banner}
\end{minipage}

in the landscape case.

To use this as a style, put the following in the file beamerthemeProva.sty

\mode<presentation>

\setbeamertemplate{headline}{  
\leavevmode
\ifportrait 
  \parbox{\textwidth}{\includegraphics[width=\textwidth]{example-image-a}}
\else
  \begin{minipage}{\textwidth}\centering\includegraphics[width=0.5\textwidth,height=15cm]{example-image-a}\end{minipage}
\fi
 \vskip-35ex
 \begin{beamercolorbox}[wd=\paperwidth]{headline}
 \begin{columns}[T]
  \begin{column}{.2\paperwidth}
    \begin{center} 
      \ifdefined\LeftLogo 
      \includegraphics[width=.6\linewidth,keepaspectratio,clip]{\LeftLogo} 
      \else 
      \fi 
    \end{center} 
    \vskip1.5cm 
  \end{column}
  \begin{column}{.65\paperwidth}
    \hskip1ex
    \vskip4ex
    \raggedright
    \usebeamercolor{title in headline}{\color{fg}\textbf{\LARGE{\inserttitle}}\\[1ex]}
    \usebeamercolor{author in headline}{\color{fg}\Large{\insertauthor}\\[0.5ex]}
    \usebeamercolor{institute in headline}{\color{fg}\large{\insertinstitute}\\[1ex]}     
  \end{column}
  \begin{column}{.15\paperwidth}
    \begin{center} 
      \ifdefined\RightLogo 
      \includegraphics[width=.6\linewidth,keepaspectratio,clip]{\RightLogo} 
      \else 
      \fi 
    \end{center} 
    \vskip1.5cm 
\end{column}
\end{columns}
\end{beamercolorbox}}

\mode<all>

and then you can have a main document (a variation on the standard example in the beamerposter distribution) such as the following

\def\RightLogo{example-image-a.pdf}
\def\LeftLogo{example-image-b.pdf}
\documentclass[final]{beamer}

\mode<presentation> { \usetheme{Berlin} 
\usepackage{times}
\usepackage{amsmath,amsthm, amssymb, latexsym}
\boldmath
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage[orientation=landscape,size=a0,scale=1.4,debug]{beamerposter}
\usetheme{Prova} }

  \graphicspath{{figures/}}
  \title[Fancy Posters]{Making Really Fancy Posters with \LaTeX}
  \author[Dreuw \& Deselaers]{Philippe Dreuw and Thomas Deselaers}
  \institute[RWTH Aachen University]{Human Language Technology and Pattern Recognition, RWTH Aachen University}
  \date{Jul. 31th, 2007}


  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5
  \begin{document}
  \begin{frame}{} 
    \vfill
    \begin{block}{\large Fontsizes}
      \centering
      {\tiny tiny}\par
      {\scriptsize scriptsize}\par
      {\footnotesize footnotesize}\par
      {\normalsize normalsize}\par
      {\large large}\par
      {\Large Large}\par
      {\LARGE LARGE}\par
      {\veryHuge VeryHuge}\par
      {\VeryHuge VeryHuge}\par
      {\VERYHuge VERYHuge}\par
    \end{block}
    \vfill
    \vfill
    \begin{block}{\large Fontsizes}
      \centering
      {\tiny tiny}\par
      {\scriptsize scriptsize}\par
      {\footnotesize footnotesize}\par
      {\normalsize normalsize}\par
      {\large large}\par
      {\Large Large}\par
      {\LARGE LARGE}\par
      {\veryHuge VeryHuge}\par
      {\VeryHuge VeryHuge}\par
      {\VERYHuge VERYHuge}\par
    \end{block}
    \vfill
    \begin{columns}[t]
      \begin{column}{.48\linewidth}
        \begin{block}{Introduction}
          \begin{itemize}
          \item some items
          \item some items
          \item some items
          \item some items
          \end{itemize}
        \end{block}
      \end{column}
      \begin{column}{.48\linewidth}
        \begin{block}{Introduction}
          \begin{itemize}
          \item some items and $\alpha=\gamma, \sum_{i}$
          \item some items
          \item some items
          \item some items
          \end{itemize}
          $$\alpha=\gamma, \sum_{i}$$
        \end{block}

        \begin{block}{Introduction}
          \begin{itemize}
          \item some items
          \item some items
          \item some items
          \item some items
          \end{itemize}
        \end{block}

        \begin{block}{Introduction}
          \begin{itemize}
          \item some items and $\alpha=\gamma, \sum_{i}$
          \item some items
          \item some items
          \item some items
          \end{itemize}
          $$\alpha=\gamma, \sum_{i}$$
        \end{block}
      \end{column}
    \end{columns}
  \end{frame}
\end{document}

You can now change the orinetation from landscape to portrait and get different effects.

Best Answer

Related Solutions

[Tex/LaTex] The definition of key default value by keyval package

[Tex/LaTex] beamerposter passing portrait options to custom theme

Related Question