Document Classes ⇒ beamer | Overlay Problems with Columns

[heriberto]

Dear all,

I am having trouble with a simple overlay in beamer. I basically would like to have a typical incremental slide series in a frame, in which embedded objects in one slide are not shown in consecutive slides. In my example I would like to show the contents of the columns in slide <1> only, then in slides <2-> just show the numbered items ("First enumerated item", "Second enumerated item", and their corresponding info).

I have tried several combinations of \only and specified the slides manually to no avail. I would appreciate very much any help.

Texmaker 3.2.2 on Windows


Best wishes and thanks!

Code: Select all

Code, edit and compile here:

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\begin{frame}[fragile]
\begin{itemize}[<+->]
\item First Item
    \begin{enumerate}
    \item First enumerated item
    \begin{columns}[t]
        \begin{column}{0.45\textwidth}
        \underline{Left Column Title}
        \begin{itemize}[<+->]           
        \newenvironment{ballotenv}
        {\only{%
        \setbeamertemplate{itemize item}{code for showing a ballot}%
        \setbeamertemplate{itemize subitem}{code for showing a smaller ballot}%
        \setbeamertemplate{itemize subsubitem}{code for showing a smaller ballot}}}
        {}
        \setbeamertemplate{itemize item}{\ding {91}}
        \setbeamertemplate{itemize subitem}{\ding {91}}
        \setbeamertemplate{itemize subsubitem}{\ding {91}}
            \item <+-| alert@+> First item on the left column
            \item <+-| alert@+> Second item on the left column.\\
            \item  <+-| alert@+> Third item on the left column.\\
            \item <+-| alert@+> Fifth item on the left colum.
            \end{itemize} 
        \end{column}
        \begin{column}{0.50\textwidth}
        \underline {Right Column Title}
        \begin{itemize}[<+->]
        {\only{%
        \setbeamertemplate{itemize item}{code for showing a ballot}%
        \setbeamertemplate{itemize subitem}{code for showing a smaller ballot}%
        \setbeamertemplate{itemize subsubitem}{code for showing a smaller ballot}}}
        {}
        \setbeamertemplate{itemize item}{\ding {91}}
        \setbeamertemplate{itemize subitem}{\ding {91}}
        \setbeamertemplate{itemize subsubitem}{\ding {91}}
            \item <+-| alert@+> First item on the right column
            \item <+-| alert@+> Second item on the right column.\\
            \item  <+-| alert@+> Third item on the right column.\\
            \item <+-| alert@+> Fifth item on the right colum.
            \end{itemize} 
        \end{column}
 
 
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Run LaTeX here

[coachbennett1981]

Please create a MWE I have created a file, but I can't run it because of some errors.. Specifically,

! Undefined control sequence.
\beamer@@tmpl@itemize subsubitem ->\ding
{91}
l.19 \item <+-| alert@+> S
econd item on the left col...

It does run and give a pdf file. Are you able to get that at least? Or does the output you get incorrect? Here is what I get, but with a few errors in the console..

beamer example.pdf

(134.13 KiB) Downloaded 349 times

Thank you

Nick