查找节点的大小

Question

我想让第二个节点（包含复选标记的圆圈）的大小自动适应矩形（第一个节点）的高度。我希望它具有矩形的高度，我该如何提取它？谢谢

梅威瑟：

\documentclass{article}
\usepackage{tikz}
\usepackage{fontawesome5}


\newcommand{\teacher}[1]{
\tikz[baseline]{
\draw (0,0) node[left=0.35cm,align=center,fill=violet!20,draw=violet,rounded corners,line width=1pt,inner sep=5pt] {#1}  node[circle,fill=violet!20,draw=violet,line width=1pt,inner sep=1pt] {\Large \color{red}\faCheck}; 
 }
}


\begin{document}

\teacher{Hello\\World}


\end{document}

Answer 1

可能有更好的方法来实现这一点，但您可以通过获取节点锚点的坐标\pgfgetlastxy，然后使用这些坐标来计算大小：

\documentclass{article}
\usepackage{tikz}
\usepackage{fontawesome5}

\newcommand{\teacher}[1]{%
    \tikz[baseline]{
        \node[
            align=center, 
            fill=violet!20, 
            draw=violet, 
            rounded corners, 
            line width=1pt, 
            inner sep=5pt
        ] (n) {#1};
        \path (n.north);
        \pgfgetlastxy{\nNorthX}{\nNorthY};
        \path (n.south);
        \pgfgetlastxy{\nSouthX}{\nSouthY};
        \node[
            circle, 
            fill=violet!20, 
            draw=violet, 
            line width=1pt, 
            inner sep=1pt,
            minimum height={\nNorthY-\nSouthY-\pgflinewidth},
            anchor=west,
            xshift={-\pgflinewidth}
        ] at (n.east) {\Large \color{red}\faCheck}; 
    }%
}

\begin{document}

\teacher{Hello\\World}

\end{document}