Graphics, Figures & Tables ⇒ Reference to a nested Node

[SAKDOSS]

Hello,

I have a reference to a nested node which is not working as well as expected. Here is an example:

Code: Select all

\begin{tikzpicture}
  \node[draw, ellipse] (e1){
    \begin{tikzpicture}
      \node (n1) {$a$};
    \end{tikzpicture}
  };

  \node[draw, ellipse] (e2) at (2,0){
    \begin{tikzpicture}
      \node (n2) {$b$};
    \end{tikzpicture}
  };

  % Arrow
  \draw[->, >=latex] (n2) to[out=160, in=20] (c1) ;
\end{tikzpicture}

It give me this :

tikZ-nested-node.jpg (2.57 KiB) Viewed 6278 times

The arrow should go from b to the ellipse on the left.

I think instead of starting from the real position of b it starts from the position of b relatively to e2.

Is it possible to fix this? (and to keep the nested structure of the ellipses)

Thanks in advance.

[Stefan Kottwitz]

You can fix it by adding the option remember picture to both tikzpicture environments:

Code: Select all

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}[remember picture]
  \node[draw, ellipse] (e1){
    \begin{tikzpicture}
      \node (n1) {$a$};
    \end{tikzpicture}
  };

  \node[draw, ellipse] (e2) at (2,0){
    \begin{tikzpicture}[remember picture]
      \node (n2) {$b$};
    \end{tikzpicture}
  };

  % Arrow
  \draw[->, >=latex] (n2) to[out=160, in=20] (n1) ;
\end{tikzpicture}
\end{document} 

nested-tikz-pictures.png (2.68 KiB) Viewed 6270 times

By the way, it would be great if you would post compilable code, as I did here. Just a few lines more, but much easier to work on and a reader can simply open it in the writeLaTeX online compiler.

Stefan

[SAKDOSS]

Excellent thank you !