Quotes problem in beamer

Question

I'm trying to make nice big quotes work in my presentation, but there is some error, a clashing of packages I assume, and I don't know how to resolve this : So my mwe is here:

%&latex
\RequirePackage[demo]{graphicx}
\documentclass[xcolor=dvipsnames,hyperref={breaklinks=true},mathserif,10pt]{beamer} 
\usecolortheme[named=RoyalPurple]{structure} 
\useoutertheme{infolines}
\usetheme[height=7mm]{Rochester}
\setbeamertemplate{items}[ball]
\setbeamertemplate{navigation symbols}{}
\usefonttheme{professionalfonts}

\usepackage{amsmath,amssymb,amsthm,amssymb}
\usepackage{mathtools}
\usepackage{bbm}
\usepackage{graphicx}
\usepackage{float}
\usepackage[croatian]{babel}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage{txfonts}
\usepackage{subfigure}
\usepackage{listings}
\usepackage{time}
\usepackage{extarrows}

\usepackage{lmodern}
\usepackage{graphicx}
\usepackage{framed}

\newcommand*\openquote{\makebox(25,-22){\scalebox{5}{``}}}
\newcommand*\closequote{\makebox(25,-22){\scalebox{5}{''}}}

\makeatletter
\newif\if@right
\def\shadequote{\@righttrue\shadequote@i}
\def\shadequote@i{\begin{snugshade}\begin{quote}\openquote}
\def\endshadequote{%
  \if@right\hfill\fi\closequote\end{quote}\end{snugshade}}
\@namedef{shadequote*}{\@rightfalse\shadequote@i}
\@namedef{endshadequote*}{\endshadequote}
\makeatother

%\logo{\includegraphics[width=0.25\textwidth]{logo.eps}}

\title{RANDOM TITLE}
\subtitle{Random subtitle}
\author{John Doe}
\institute[Random institute at random place}
\date{\today}

\begin{document}
\maketitle

\begin{frame}
\frametitle{TOC}
\tableofcontents
\end{frame}

\section{Intro}

\begin{frame}
\frametitle{Intro}
\begin{columns}
    \begin{column}{0.5\textwidth}
        \begin{itemize}
        \item[]
        \flushleft{\includegraphics[width=0.5\textwidth]{elvish.eps}}
        \end{itemize}
    \end{column}
    \begin{column}{0.5\textwidth}
        \begin{shadequote}
        A common mistake that people make when trying to design something completely
        foolproof is to underestimate the ingenuity of complete fools.\par\emph{Douglas Adams}
        \end{shadequote}
    \end{column}
\end{columns}
\end{frame}

\end{document}

Basically I'd like to have image on the left and next to it (on the right) two quotes. I followed the instructions here, but I guess I made sth wrong :\ I didn't want any shade underneath my quotes so I left out the colorlet part...

So any help would be helpful.

Answer 1

Summary

• You must not leave the \colorlet part out as that is important in the definition of \shadequote, I think, based on the error I get:

Package xcolor error: Undefined error 'shadecolor'\end{frame}

• The svgnames was important for the color name Azure so you may use the option xcolor={svgnames, dvipsnames}. Or if you don't want to load svgnames, use more generic colors or combination of them in your \colorlet{shadecolor}. If you don't want shading in your quote, use \colorlet{shadecolor}{white} instead. In that case, svgnames may not be loaded.

• the mathserif option is already deprecated. Use \usefonttheme[onlymath]{serif} instead.

• There is a scoping problem in \institute[Random institute at random place}. I changed [ to }.
• Compile with the latex->dvips->ps2pdf sequence.

Revised Code

%&latex
\RequirePackage[demo]{graphicx}
\documentclass[xcolor={dvipsnames}
,hyperref={breaklinks=true}
%,mathserif
,10pt]{beamer} 
\colorlet{shadecolor}{blue}
\usefonttheme[onlymath]{serif}
\usecolortheme[named=RoyalPurple]{structure} 
\useoutertheme{infolines}
\usetheme[height=7mm]{Rochester}
\setbeamertemplate{items}[ball]
\setbeamertemplate{navigation symbols}{}
\usefonttheme{professionalfonts}

\usepackage{amsmath,amssymb,amsthm,amssymb}
\usepackage{mathtools}
\usepackage{bbm}
\usepackage{graphicx}
\usepackage{float}
\usepackage[croatian]{babel}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage{txfonts}
\usepackage{subfigure}
\usepackage{listings}
\usepackage{time}
\usepackage{extarrows}

\usepackage{lmodern}
\usepackage{graphicx}
\usepackage{framed}

\newcommand*\openquote{\makebox(25,-22){\scalebox{5}{``}}}
\newcommand*\closequote{\makebox(25,-22){\scalebox{5}{''}}}

\makeatletter
\newif\if@right
\def\shadequote{\@righttrue\shadequote@i}
\def\shadequote@i{\begin{snugshade}\begin{quote}\openquote}
\def\endshadequote{%
  \if@right\hfill\fi\closequote\end{quote}\end{snugshade}}
\@namedef{shadequote*}{\@rightfalse\shadequote@i}
\@namedef{endshadequote*}{\endshadequote}
\makeatother

%\logo{\includegraphics[width=0.25\textwidth]{logo.eps}}

\title{RANDOM TITLE}
\subtitle{Random subtitle}
\author{John Doe}
\institute{Random institute at random place}
\date{\today}

\begin{document}
\maketitle

\begin{frame}
\frametitle{TOC}
\tableofcontents
\end{frame}

\section{Intro}

\begin{frame}
\frametitle{Intro}
\begin{columns}
    \begin{column}{0.5\textwidth}
        \begin{itemize}
        \item[]
        \flushleft{\includegraphics[width=0.5\textwidth]{elvish.eps}}
        \end{itemize}
    \end{column}
    \begin{column}{0.5\textwidth}
        \begin{shadequote}
        A common mistake that people make when trying to design something completely
        foolproof is to underestimate the ingenuity of complete fools.\par\emph{Douglas Adams}
        \end{shadequote}
    \end{column}
\end{columns}
\end{frame}

\end{document}

Output