\only macro inside tblr

Question

I have a tblr table in which I would like to highlight some cells gradually and for each one, when it is highlighted some related stuff is displayed below the table.

Here in my MWE, I reproduced the entire table for each \only command, each time highlighting what I want to highlight.

What I want is something like this:

  \only<1>{
     \begin {tblr}{colspec={l},cell{1}{1}={fg=purple}}}
  \only<2>{
     \begin {tblr}{colspec={l},cell{2}{1}={fg=purple}}}
  \only<1->{
  \begin {tblr}{colspec={l},cell{3}{1}={fg=purple}}}
     pays d'europe\\
     pays d'asie\\
     pays d'afrique\\
  \end {tblr}

The best would be that tabularray supports this feature.

I have found a solution is another post, but that user uses tabular. I did not get it work for tblr

\documentclass[aspectratio=169,t]{beamer}

\mode<presentation>
\usetheme{moloch}
\usepackage{tabularray,blindtext,tikz}
\UseTblrLibrary{tikz}
\SetTblrInner{rowsep={2pt}}
\newcommand{\titles}[1]{{\centering\bfseries #1\par\vspace{.6em}}}


\newcommand{\purp}[1]{\textcolor{purple}{#1}}
\newcommand{\mage}[1]{\textcolor{magenta}{#1}}

\begin{document}
\begin{frame}{aaa}
  \centering
  
  \only<1>{
    \begin {tblr}{l}
    \purp{pays d'europe}\\
    pays d'asie\\
    pays d'afrique\\
    \end {tblr}
  }
  
    \only<2>{
    \begin {tblr}{l}
    pays d'europe\\
    \purp{pays d'asie}\\
    pays d'afrique\\
    \end {tblr}
    }
    
    \only<3>{
    \begin {tblr}{l}
    pays d'europe\\
    pays d'asie\\
    \purp{pays d'afrique}\\
    \end {tblr}
  }
    \vspace{5\parskip} 

  \only<1>{
    allemagne,france,espagne}
  \only<2>{chine, inde, birmanie}
  \only<3>{mali, cameroun, sénégal}

\end{frame}

\end{document}

samcarter_is_at_topanswers.xyz · Accepted Answer · 2025-10-31 15:59:37Z

Solution 1:

You don't actually need tabularray to change the text colour, instead you could make your \purp macro overlay aware:

\documentclass[aspectratio=169,t]{beamer}

\usetheme{moloch}
\usepackage{tabularray}
\SetTblrInner{rowsep={2pt}}

\newcommand<>{\purp}[1]{\textcolor#2{purple}{#1}}

\begin{document}
\begin{frame}
\frametitle{aaa}
  \centering

  \begin{tblr}{l}
  \purp<1>{pays d'europe}\\
  \purp<2>{pays d'asie}\\
  \purp<3>{pays d'afrique}\\
  \end{tblr}

  \vfill

  \only<1>{allemagne,france,espagne}
  \only<2>{chine, inde, birmanie}
  \only<3>{mali, cameroun, sénégal}

\end{frame}

\end{document}

Solution 2:

If you need some tabularray-specific features, you could do something like this:

\documentclass[aspectratio=169,t]{beamer}

\usetheme{moloch}
\usepackage{tabularray}
\SetTblrInner{rowsep={2pt}}

\begin{document}
\begin{frame}
\frametitle{aaa}
  \centering
  
  \only<1>{\SetTblrInner{cell{1}{1}={fg=purple}}}
  \only<2>{\SetTblrInner{cell{2}{1}={fg=purple}}}
  \only<3>{\SetTblrInner{cell{3}{1}={fg=purple}}}

  \begin{tblr}{l}
  pays d'europe\\
  pays d'asie\\
  pays d'afrique\\
  \end{tblr}

  \vfill

  \only<1>{allemagne,france,espagne}
  \only<2>{chine, inde, birmanie}
  \only<3>{mali, cameroun, sénégal}

\end{frame}

\end{document}

@user1850133 See section "9.6.1 Making Commands and Environments Overlay Specification-Aware" of the beamer user guide — samcarter_is_at_topanswers.xyz
– samcarter_is_at_topanswers.xyz, Commented 23 hours ago

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