[Tex/LaTex] Can a beamer frame have both [containsverbatim] and hidden/shown block options?

beameroverlaysverbatim

Possible Duplicate:
\pause won't generate extra slides in a containsverbatim frame

I use lstlisting environments in my beamer frames, but I would also like to have blocks with showing/hidden options like <2>, <1-3>, etc. With the following code, only the first version of the frame is displayed (with only the first block). Is there a way to make the hidden/shown block options work when the [containsverbatim] option is active?

\begin{frame}[containsverbatim]

  \begin{block}{}
    \begin{lstlisting}
blah blah blah
    \end{lstlisting}
  \end{block}

  \begin{block}<2>{}
    \begin{lstlisting}
blah blah blah
    \end{lstlisting}
  \end{block}

\end{frame}

Best Answer

Of course you can combine verbatim material and overlay specifications in your frames; only some precautions must be taken: to use verbatim material in a frame, you have to add the option [fragile] to the frame environment (with verbatim material, the \frame command will not do); the \end{frame} line must be alone on a single line:

\documentclass{beamer}
\usepackage{listings}

\begin{document}

\begin{frame}[fragile]
\begin{block}{}
\begin{lstlisting}
blah blah blah
\end{lstlisting}
\end{block}

\begin{block}<2>{}
\begin{lstlisting}
blah blah blah
\end{lstlisting}
\end{block}
\end{frame}

\end{document}

Related Solutions

[Tex/LaTex] How to use layers with blocks and columns

To get that particular effect, do not use the uncover for blocks:

\documentclass{beamer}
\usepackage{lmodern}

\usetheme{CambridgeUS}

\setbeamercovered{transparent}

\begin{document}

\begin{frame}{myFrame}{subtitle}
\begin{columns}
\begin{column}{.4\textwidth}
    \begin{enumerate}
    \item<1->item 1
    \item<2->item 2
    \item<3->item 3
    \end{enumerate}
\end{column}%
\begin{column}{.6\textwidth}
        \begin{block}<1->{Block1}
              Text in block 1.
        \end{block}
        \begin{block}<2->{Block2}
          Text in block 2.
        \end{block}
        \begin{block}<3->{Block3}
          Text in block 3.
        \end{block}
\end{column}
\end{columns}
\end{frame}
\end{document}

The result:

enter image description here

[Tex/LaTex] Permanent Transparent Block in a Frame in Beamer

Quoting the manual:

\invisible<⟨overlay specification⟩>{⟨text⟩}

This command is the opposite of \visible.

So, what does \visible do? Quoting again the manual:

\visible<⟨overlay specification⟩>{⟨text⟩}

This command does almost the same as \uncover. The only difference is that if the text is not shown, it is never shown in a transparent way, but rather it is not shown at all. Thus, for this command the transparency settings have no effect.

Therefore, if you really want to have the second block transparent, you don't have to use \invisible.

You can use \onslide for example, of course by specifying first \setbeamercovered{transparent}:

\documentclass{beamer}
\usepackage{lmodern}
\usepackage{mwe}% for dummy images
\usepackage{amsmath}
\usetheme{CambridgeUS}
\setbeamercovered{transparent}
\begin{document}
\begin{frame}
\only<1>{
\begin{block}{procedure-1}
 \centering% use this and not the center environment
 \includegraphics<1>[height=1.3in,width=4in]{example-image}
\end{block}
}
\only<2>{
\begin{block}{procedure-2}
 \centering% use this and not the center environment
 \includegraphics<2>[height=1.3in,width=4in]{example-image-a}
\end{block}
}
\only<3->{
\begin{block}{procedure-3}
 \centering% use this and not the center environment
 \includegraphics<3->[height=1.3in,width=4in]{example-image-c}
\end{block}
}
\onslide<4>{
\begin{block}{Mathematical Formulation}
\begin{equation}
 0+0=0
\end{equation}
\end{block}
}
\end{frame}
\end{document}