多个 TikZ 节点中第一个节点的间距很奇怪

Question

我想使用 TikZ 创建一个简单的图表。下面的代码显示了一个我无法解决的问题：第一个节点的第二个和第三个单元格之间的间距（单词“某些条件”和列表之间的间距itemize）与所有其他节点不同。请注意第一个节点指的是代码中首先定义的状态 2，而不是图片顶部的那个状态 1。我在表格中添加了一些行，以便更好地说明“某些文本”部分的问题。

似乎在 中添加更多空间topsep会itemize产生负面影响，而添加below=of orig部分（参见注释行）以强制使用相同的语法不会改变任何内容。我该怎么做才能让第一个节点看起来与其他节点完全一样？

\documentclass[12pt]{article}
\usepackage{pgfplots}
\usepgfplotslibrary{units}

\usepackage{tikz}
\usepackage{tikz-3dplot}
\usetikzlibrary{positioning}

\usepackage{enumitem}

\begin{document}

\begin{figure}%[!h]
\centering

\tikzset{line/.style={draw, thick, -latex', color=black}}
\tikzset{newbox/.style={rounded corners=1.75pt, very thick, minimum width=2.5cm, minimum height=1cm, text centered, draw=brown!90!black}}

\begin{tikzpicture}[node distance=1.0cm and 0.7cm, auto]
    %\coordinate (orig) at (0,0);
    %\node [newbox, below=of orig] (s2) {
    \node [newbox] (s2) {
        \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 2}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
            \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
            \end{itemize}
        }\\\hline
        \end{tabular}
    };
    \node [newbox, right=of s2] (s3) {
        \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 3}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
            \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
            \end{itemize}
        }\\\hline
        \end{tabular}
    };

    \coordinate (mid) at ($(s2.north east)!0.5!(s3.north west)$);

    \node [newbox, above=of mid] (s1) {
        \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 1}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
            \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
            \end{itemize}
        }\\\hline
        \end{tabular}
    };

    \draw [line] (s1) -- (s2);
    \draw [line] (s2) --++ (s3);
    \draw [line] (s3) to [min distance=50pt,out=15,in=30,looseness=1] node[above] {otherwise} (s3);
    \draw [line] (s3) to [loop above,looseness=4] node[above] {otherwise} (s3);
    \draw [line] (s3.south) --++ (0cm,-0.5cm) -| (s2);
\end{tikzpicture}
\caption{MWE}
\label{fig:mwe}
\end{figure}

\end{document}

Answer 1

黑客：

\documentclass[12pt]{article}
\usepackage{tikz}
\usetikzlibrary{positioning,calc,arrows}
\usepackage{enumitem}
\begin{document}

\begin{figure}%[!h]
  \centering
  \mbox{}
  \par
  \tikzset{%
    line/.style={draw, thick, -latex', color=black},
    newbox/.style={rounded corners=1.75pt, very thick, minimum width=2.5cm, minimum height=1cm, text centered, draw=brown!90!black},
  }

  \begin{tikzpicture}[node distance=1.0cm and 0.7cm, auto]
    \node [newbox] (s2) {
      \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 2}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
          \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
          \end{itemize}
        }\\\hline
      \end{tabular}
    };
    \node [newbox, right=of s2] (s3) {
      \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 3}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
          \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
          \end{itemize}
        }\\\hline
      \end{tabular}
    };

    \coordinate (mid) at ($(s2.north east)!0.5!(s3.north west)$);

    \node [newbox, above=40pt of mid] (s1) {
      \begin{tabular}{|l|}\hline
        \multicolumn{1}{|c|}{\color{red}{\textsc{State 1}}}\\\hline
        {some condition:}\\\hline
        \parbox{5.6cm}{
          \begin{itemize}[noitemsep,nolistsep,topsep=5pt]
            \item Some Text
            \item Some More Text Here
          \end{itemize}
        }\\\hline
      \end{tabular}
    };

    \draw [line] (s1) -- (s2);
    \draw [line] (s2) --++ (s3);
    \draw [line] (s3) to [min distance=50pt,out=15,in=30,looseness=1] node[above] {otherwise} (s3);
    \draw [line] (s3) to [loop above,looseness=4] node[above] {otherwise} (s3);
    \draw [line] (s3.south) --++ (0cm,-0.5cm) -| (s2);
  \end{tikzpicture}
  \caption{MWE}
  \label{fig:mwe}
\end{figure}

\end{document}