如何在 tikzpicture 中制作正方形

Question

我有以下脚本：

\documentclass[conference,compsoc]{IEEEtran}
\usepackage{tikz} %for the heirarchical tree

%for the hierarchical tree
\usetikzlibrary{arrows,shapes,positioning,shadows,trees} 
\tikzset{
  basic/.style  = {draw, text width=2cm, drop shadow, font=\sffamily, rectangle},
  root/.style   = {basic, rounded corners=2pt, thin, align=center,
                   fill=green!30},
  level 2/.style = {basic, rounded corners=6pt, thin,align=center, fill=green!60,
                   text width=8em},
  level 3/.style = {basic, thin, align=left, fill=pink!60, text width=6.5em}
}

\begin{document}

\begin{tikzpicture}
[-,thick,%
  every node/.style={shape=rectangle,inner sep=3pt,draw,thick}]
\footnotesize
\node {Parent} [edge from parent fork down]
[sibling distance=4cm]
child {node {Type}}
child {node {Title Here}
    [sibling distance=2cm]
    child {node {Two Words Long}}
    child {node {Two Word Long}}
    }
;
\end{tikzpicture}

\end{document}

输出下图：

我需要让子节点与其父节点的平方相似，并避免任何两个节点相交。如何做到这一点？

Answer 1

这很简单：不要定义带有圆角的节点形状，并使用适当的较大兄弟距离。对于矩形形状的节点：

\documentclass[conference,compsoc]{IEEEtran}
\usepackage{tikz} 
\usetikzlibrary{arrows, positioning, shadows, shapes, trees}

\begin{document}
    \begin{tikzpicture}[-,thick,%
every node/.style = {rectangle, draw, thick, fill=white,
                     drop shadow, font=\sffamily},
 sibling distance = 30mm 
                       ]
\node {Parent} [edge from parent fork down]
    child {node {Type}}
    child {node {Title Here}
        child {node {Two Words Long}}
        child {node {Two Word Long}}
            };
    \end{tikzpicture}
\end{document}

更forest简单，不需要定义兄弟距离，节点之间距离即可：

\documentclass[conference,compsoc]{IEEEtran}
\usepackage{tikz}   % for tikz trees
\usetikzlibrary{arrows, positioning, shadows, shapes, trees}
\usepackage[edges]{forest} % for forest tree

\begin{document}
   \begin{forest}
    for tree={              % style of tree nodes
      draw, semithick,
             font = \sffamily,
             fill = white, drop shadow,                            
             edge = {draw, semithick},
           anchor = north,
             grow = south,
                            % style of tree (edges, distances, direction)
    forked edge,            % for forked edge
            s sep = 8mm,    % sibling distance
            l sep = 8mm,    % level distance
         fork sep = 4mm,    % distance from parent to branching point
         tier/.option=level,
               }
     [Parent
      [Type]
      [Title Here
        [Two Words Long]
        [Two Words Long]
      ]
    ]
    \end{forest}
\end{document}

结果几乎是一样的：

要使节点具有方形形状则更加棘手。我假设，实际树中的文本长度相同，则可以根据定义的文本宽度计算文本高度：

\documentclass[conference,compsoc]{IEEEtran}
\usepackage{tikz}   % for tikz trees
\usetikzlibrary{arrows, positioning, shadows, shapes, trees}
\usepackage[edges]{forest} % for forest tree

\begin{document}

    \begin{tikzpicture}[-,thick,%
every node/.style = {rectangle, draw, thick, fill=white,
                     inner sep=2mm, text width=18mm, minimum height=18mm,
                     align=flush center,
                     drop shadow, font=\sffamily},
 sibling distance = 30mm,
   level distance = 30mm
]
\node {Parent} [edge from parent fork down]
    child {node {Type}}
    child {node {Title Here}
        child {node {Two Words Long}}
        child {node {Two Word Long}}
            };
    \end{tikzpicture}
\end{document}

正如预期的那样，结果很糟糕，并且让我相信你的意思长方形并不是正方形形状（正如我在第一个和第二个例子中假设的那样）：