Fwd: center the content (text!) of a box

[Christoph Bartoschek-2]

Maybe you can draw the box around the picture:

\begin{tikzpicture}[remember picture,overlay]
  \node (text) at (0, 0) {$\left(\tikz[remember picture] \node[inner sep=0]
(c) {$\cdot$};\right)^2$};
  \draw (c.center) ++(-0.5, -0.5) rectangle ++(1, 1);
  \draw [red](c.center)  circle (1pt);
\end{tikzpicture}

Hi,

I'd like to center (horizontally and vertically) the content of the box
in the following example with respect to the parentheses.  This means
that the exponent should be ignored.  I tried to achieve this with some
\vphantom-commands (as I usually do outside of pgf/tikz) but irritatingly
with no effect.  What do I have to do?

\documentclass[12pt]{scrartcl}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
 \draw (-0.5,-0.5) rectangle (0.5,0.5);
 \path (0,0) node {$\vphantom{_2}\left(\cdot\right)^2\vphantom{_2}$};
\end{tikzpicture}
\end{document}

Regards,

Juergen

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[Christoph Bartoschek-2]

Am Dienstag, 1. Juli 2008 schrieb Christoph Bartoschek:
> Maybe you can draw the box around the picture:
>
> \begin{tikzpicture}[remember picture,overlay]
>   \node (text) at (0, 0) {$\left(\tikz[remember picture] \node[inner sep=0]
> (c) {$\cdot$};\right)^2$};
>   \draw (c.center) ++(-0.5, -0.5) rectangle ++(1, 1);
>   \draw [red](c.center)  circle (1pt);
> \end{tikzpicture}

\begin{tikzpicture}[remember picture,overlay]
  \node (text) at (0, 0) {$\tikz[remember picture] \node[inner sep=0] (c)
{$\left(\cdot\right)$};^2$};
  \draw (c.center) ++(-0.5, -0.5) rectangle ++(1, 1);
  \draw [red](c.center)  circle (1pt);
\end{tikzpicture}

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[Goebel, Juergen, OPES27]

> Christoph Bartoschek wrote:

> Maybe you can draw the box around the picture:
>
> \begin{tikzpicture}[remember picture,overlay]
>   \node (text) at (0, 0) {$\left(\tikz[remember picture]
> \node[inner sep=0]
> (c) {$\cdot$};\right)^2$};
>   \draw (c.center) ++(-0.5, -0.5) rectangle ++(1, 1);
>   \draw [red](c.center)  circle (1pt);
> \end{tikzpicture}

Interesting, but I will prefer Marks approach.
Thanks for your suggestion.

Best,

Juergen

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