如何获得相同尺寸的盒子？

Question

我希望所有矩形都具有相同的大小。我应该怎么做？

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage{tikz-qtree}
\tikzset{edge from parent/.style=
{draw,
edge from parent path={(\tikzparentnode.east)
-- +(8pt,0)
|- (\tikzchildnode)}}}
\begin{document}

\begin{tikzpicture}
\tikzset{grow'=right,level distance=1.5cm}
\tikzset{execute at begin node=\strut}
\tikzset{every tree node/.style={anchor=base west}}
\Tree [.\node(root){S}; [.\node(np){NP}; [.\node(d){Det}; \node(t){the}; ] [.N cat ] ]
[.VP [.V sat ]
[.PP [.P \node(o){on}; ]
[.NP [.Det the ] [.N \node(m){mat}; ] ] ] ] ]

\begin{scope}[every node/.style={align=left, anchor=center, font=\tiny\sffamily\bfseries,rectangle,draw}]
 \node[above= 2mm of t] (thenode) {FOURTH};
 \node[at =(thenode-|root)] {FIRST};
 \node[at =(thenode-|np)] {SECOND};
 \node[at =(thenode-|d)] {THIRD};
 \node[at =(thenode-|o)] {FIFTH};
 \node[at =(thenode-|m)] {SIXTH};

\end{scope}
\end{tikzpicture}

\end{document} 

Answer 1

我有

1. 在树周围添加了范围，并将的样式传递text width=\widthof{Det}给范围
2. minimum width=\widthof{FOURTH}为上部标签的范围添加了样式
3. 适当调整水平距离以适应这些宽度。

代码。

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage{tikz-qtree}
\tikzset{edge from parent/.style=
{draw,
edge from parent path={(\tikzparentnode.east)
-- +(8pt,0)
|- (\tikzchildnode)}}}
\begin{document}

\begin{tikzpicture}
\tikzset{grow'=right,level distance=4.5em}
\tikzset{execute at begin node=\strut}
\tikzset{every tree node/.style={anchor=base west}}
\begin{scope}[text width=\widthof{Det}]  %%<--- this
\Tree [.\node(root){S}; [.\node(np){NP}; [.\node(d){Det}; \node(t){the}; ] [.N cat ] ]
[.VP [.V sat ]
[.PP [.P \node(o){on}; ]
[.NP [.Det the ] [.N \node(m){mat}; ] ] ] ] ]
\end{scope}
\begin{scope}[every node/.style={align=left, anchor=center,
                             font=\tiny\sffamily\bfseries,rectangle,draw,
                             minimum width=\widthof{FOURTH}}]
 \node[above= 2mm of t] (thenode) {FOURTH};
 \node[at =(thenode-|root)] {FIRST};
 \node[at =(thenode-|np)] {SECOND};
 \node[at =(thenode-|d)] {THIRD};
 \node[at =(thenode-|o)] {FIFTH};
 \node[at =(thenode-|m)] {SIXTH};

\end{scope}
\end{tikzpicture}

\end{document}