How get size and location of tikz block

Question

I have short and simple question. How get the size and location of a block in Tikz ?

Example:

\begin{document}
\tikzstyle{block} = [draw, fill=white!10, rectangle]
\begin{center}
\begin{tikzpicture}[auto,>=latex']

\node [block, minimum width=1cm, minimum height=1cm] (TestBlock)
{
    This is simple text
};


\end{tikzpicture}
\end{center}

\end{document}

Yes, I mean an existing node. I put node in diagram and then a need size of this node — Rariusz, Jan 18 '18 at 12:46
If it is a rectangle measure the distance between east and west anchors. Without an example, that's theonly help we can offer. — percusse, Jan 18 '18 at 12:47
Please be more specific, adding some construct the object you want information about. — Andrew Swann, Jan 18 '18 at 13:06
See also https://tex.stackexchange.com/questions/137356/how-can-i-access-the-size-of-a-tikzpictures-bounding-box-outside-the-tikzpictur?s=1|68.8037 — John Kormylo, Jan 18 '18 at 14:37

score 4 · Answer 1 · answered Jan 18 '18 at 14:03

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,calc}
\tikzset{block/.style={draw, fill=white!10, rectangle}}
\begin{document}
\begin{tikzpicture}[auto,>=latex']
\node [block, minimum width=1cm, minimum height=1cm] (TestBlock) {This is simple text};
\draw[red] let \p1=(TestBlock.east),\p2=(TestBlock.west), \n1={\x1-\x2} in 
         ([yshift=-1mm]TestBlock.south west) -- ++(\n1,0pt) node[midway,below] {this long};
% An alternative which you can hide inside a macro
\pgfpointdiff{\pgfpointanchor{TestBlock}{south east}}{\pgfpointanchor{TestBlock}{north east}}
\pgfmathsetmacro\mytemp{\csname pgf@y\endcsname}
\draw[blue] ([xshift=1mm]TestBlock.south east) -- ++(0pt,\mytemp pt) 
                                                         node[midway,right] {this high};
\end{tikzpicture}
\end{document}

This, this right here. This is why TIKZ is literal hellspawn. How are you supposed to know that by setting \p1 to a coordinate, you can access \x1 as the x-value of that coordinate? Who's idea was that?? — rosstex, Jul 21 '20 at 06:14

How get size and location of tikz block

1 Answers1

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