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This recent question tickled my curiosity on etoolbox (that looks great but that I have actually never used).

After a quick check, I don't read any notorious incompatibility between etoolbox and beamer.

Where am I wrong when I try this ? Must be silly...

%\documentclass{memoir}
%\documentclass{article}
\documentclass{beamer}

\usepackage{etoolbox}
\usepackage{tikz}


% This works fine
%\BeforeBeginEnvironment{tikzpicture}{\begin{center}}
%\AfterEndEnvironment{tikzpicture}{\end{center}}


% It generates an error
%\BeforeBeginEnvironment{tikzpicture}{\begin{frame}}
\BeforeBeginEnvironment{tikzpicture}{ \begin{frame} \frametitle{My TikZ} }
\AfterEndEnvironment{tikzpicture}{ \end{frame} }


\begin{document}
    \begin{tikzpicture}
        \node[circle,draw=red] {Test};
    \end{tikzpicture}
\end{document}
David Carlisle
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JeT
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    beamer frames are grabbed as a whole so the code needs to see \end{frame} explicitly in the document – David Carlisle Dec 08 '21 at 20:34
  • @DavidCarlisle mmm... thanks boss :) So probably no by-pass to that I presume. – JeT Dec 08 '21 at 20:36
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    @JeT Try changing your definition to \BeforeBeginEnvironment{tikzpicture}{\begin{frame}[environment=tikzpicture]\frametitle{My TikZ}} (though I'm not sure it's a good idea to make all tikzpictures do a frame...) – Phelype Oleinik Dec 08 '21 at 21:26
  • @PhelypeOleinik obrigado. You're right, bad idea but the example was simple enough as an exercise to try to understand this package. – JeT Dec 08 '21 at 21:39
  • @PhelypeOleinik is it just me or I know get an error Incomplete \ifx ? – JeT Dec 08 '21 at 22:22
  • @JeT As I said, not sure if it's a good idea :) the environment option works when you do \newenvironment{myenv}{\begin{frame}[environment=myenv]}. It doesn't work when you use environment hooks (and I think it's not possible to make it work). – Phelype Oleinik Dec 08 '21 at 23:53

1 Answers1

1

beamer frames are grabbed as a whole so the code needs to see \end{frame} explicitly in the document otherwise it will parse ahead past the end of the frame looking for \end{frame}.

David Carlisle
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