Beamer overlays in tikz-network figures

Question

I would like to define overlays (in the Beamer sense) in figures designed using the tikz-network package.

For instance, say I have the following figure:

\documentclass{standalone}

\usepackage{tikz}
\usepackage{tikz-network}

\begin{document}
\begin{frame}
\begin{tikzpicture}
    \Vertex[x=0.0, y=1.0, label=$v_1$]{v1}
    \Vertex[x=1.0, y=1.0, label=$v_2$]{v2}
    \Vertex[x=2.0, y=1.0, label=$v_3$]{v3}

    \Edge[color=black](v1)(v2)
    \Edge[color=black](v2)(v3)
\end{tikzpicture}
\end{frame}
\end{document}

and that I want node v1 to disappear at step 2. I have tried using the visible on key proposed here: https://tex.stackexchange.com/a/136166/31360 and which looks like this:

\documentclass{beamer}

\usepackage{tikz}
\usepackage{tikz-network}

\tikzset{
  invisible/.style={opacity=0},
  visible on/.style={alt={#1{}{invisible}}},
  alt/.code args={<#1>#2#3}{%
    \alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}} % \pgfkeysalso doesn't change the path
  },
}

\begin{document}
\begin{frame}
\begin{tikzpicture}
    \Vertex[x=0.0, y=1.0, label=$v_1$, visible on=<2->]{v1}
    \Vertex[x=1.0, y=1.0, label=$v_2$]{v2}
    \Vertex[x=2.0, y=1.0, label=$v_3$]{v3}

    \Edge[color=black](v1)(v2)
    \Edge[color=black](v2)(v3)
\end{tikzpicture}
\end{frame}
\end{document}

But it does not seem to work with tikz-network, as I get a "Package xkeyval Error: 'on visible' undefined in families 'vertex'" error. I guess the solution is to extend the key to vertex (and to edge as well), but I do not know how to do that.

To make use of \alt, you need in one way or another involve beamer. And you need to switch to the tikz directory with \Vertex[x=0.0, y=1.0, label=$v_1$,style={visible on=<2->}]{v1}. — , Oct 30 '19 at 21:00
Indeed, I forgot to include the beamer code when I wrote the minimal example, my bad. I fixed that in the question. About your above solution: it works fine...except for the text, which is still displayed when the rest of the node isn't. — Vincent Labatut, Oct 31 '19 at 08:15

score 2 · Accepted Answer · answered Oct 30 '19 at 21:21

Not knowing the tikz-network package, I don't know if it is possible to adapt the visible on style for tikz-network. Nevertheless, it is still possible to use the classic controls for overlaying with beamer.

To do this, you must place yourself in a frame environment (which you have forgotten). The commands \onslide and \only are identical except that \onslide reserves the place of what it does not display.

\documentclass{beamer}

\usepackage{tikz}
\usepackage{tikz-network}

%  \tikzset{
%    invisible/.style={opacity=0},
%    visible on/.style={alt={#1{}{invisible}}},
%    alt/.code args={<#1>#2#3}{%
%      \alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}} % \pgfkeysalso doesn't change the path
%    },
%  }
\begin{document}
\begin{frame}
\begin{tikzpicture}
    \onslide<1->{\Vertex[x=0.0, y=1.0, label=$v_1$]{v1}}
    \onslide<2->{\Vertex[x=1.0, y=1.0, label=$v_2$]{v2}}
    \onslide<3->{\Vertex[x=2.0, y=1.0, label=$v_3$]{v3}}

    \only<2->{\Edge[color=black](v1)(v2)}
    \only<3>{\Edge[color=black](v2)(v3)}
\end{tikzpicture}
\end{frame}

\end{document}

Translated with www.DeepL.com/Translator

Indeed, I had forgotten to put the figure in a beamer document in my question. I have corrected that. Thanks for your answer! — Vincent Labatut, Oct 31 '19 at 08:19

score 1 · Answer 2 · 2019-10-30T21:24:35.800

If you switch to beamer, you can make of the \alt command that the TikZ styles you are trying to employ are using. Unfortunately, tikz-network has its own keys for opacity, so you could do something like the following:

\documentclass{beamer}

\usepackage{tikz}
\usepackage{tikz-network}

\begin{document}
\begin{frame}[t]
\frametitle{A network}
\begin{tikzpicture}
    \begin{scope}
    \alt<2->{}{\def\VertexFillOpacity{0}\def\VertexLineOpacity{0}
    \def\VertexTextOpacity{0}}
    \Vertex[x=0.0, y=1.0, label=$v_1$]{v1}
    \end{scope}
    \Vertex[x=1.0, y=1.0, label=$v_2$]{v2}
    \Vertex[x=2.0, y=1.0, label=$v_3$]{v3}

    \Edge[color=black](v1)(v2)
    \Edge[color=black](v2)(v3)
\end{tikzpicture}
\end{frame}
\end{document}

Or, with the edge also disappearing and a style.

\documentclass{beamer}

\usepackage{tikz}
\usepackage{tikz-network}
\tikzset{
  network invisible/.code={\def\VertexFillOpacity{0}\def\VertexLineOpacity{0}\def\VertexTextOpacity{0}
  \def\EdgeOpacity{0}\def\EdgeTextFillOpacity{0}\def\EdgeTextOpacity{0}},
  network visible on/.code={\alt#1{}{\tikzset{network invisible}}}}
\begin{document}
\begin{frame}[t]
\frametitle{A network}
\begin{tikzpicture}
    \begin{scope}[network visible on=<2->]
      \Vertex[x=0.0, y=1.0, label=$v_1$]{v1}
    \end{scope}
    \Vertex[x=1.0, y=1.0, label=$v_2$]{v2}
    \Vertex[x=2.0, y=1.0, label=$v_3$]{v3}
    \begin{scope}[network visible on=<2->]
    \Edge[color=black](v1)(v2)
    \end{scope}
    \Edge[color=black](v2)(v3)
\end{tikzpicture}
\end{frame}
\end{document}

Let me also mention that the visible on style was invented for a reason: you can use the vertices in paths even when they are not shown, and you are not haunted by jumps in the slides. — , Oct 30 '19 at 21:39
Thanks for your answer! I do not need to draw paths, so I think I'll use AndréC's solution, though, as I find it is less verbose. — Vincent Labatut, Oct 31 '19 at 08:22
@VincentLabatut tikz-network adds a lot of paths, so sooner or later you may experience jumps. There is a very long analogous story in the context of ordinary tikzpictures. — , Oct 31 '19 at 14:53

Beamer overlays in tikz-network figures

2 Answers2