使用边缘样式时水平 tikz-qtree 级别距离太大

Question

在对 tikz-qtree 进行了大量调整后，我最终得到了下面的结果。但我不知道为什么XML节点后的级别距离太长，即使level distance为该级别设置了，线条仍然又长又粗。

\documentclass[12pt]{paper}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[francais]{babel}
% tree
\usepackage{tikz}
\usepackage{tikz-qtree}
\usetikzlibrary{positioning,babel,trees}

\begin{document}
\begin{tikzpicture}[grow'=right,level distance=1.2in,sibling distance=.05in]
\tikzset{edge from parent/.style={thick, draw, edge from parent fork right},
         every tree node/.style={draw,minimum width=1in,text width=1in,align=center},
         level 1/.style={sibling distance=-40mm},
         level 2/.style={level distance=10mm}}
 \Tree [.SGML {HTML 4.0} [.\node(x) {XML}; [ XHTML XML DOM [.XSL XSLT XSL-FO XPath ] XQuery DTD XSD SOAP WSDL RDF RSS SVG ] ] ]
 \end{tikzpicture} 
\end{document}

编辑：.\node(x) {XML};或者.XML不做任何改变

Answer 1

如果你不介意更换软件包，你可以使用强大的forest：

\documentclass[tikz,border=5pt]{standalone}
\usepackage{forest}
\begin{document}
  \begin{forest}
    for tree={
      edge path={
        \noexpand\path [draw, thick, \forestoption{edge}] (!u.parent anchor) -- +(5pt,0) |- (.child anchor)\forestoption{edge label};
      },
      parent anchor=east,
      child anchor=west,
      grow'=east,
      text centered,
      draw,
      thick,
      minimum width=1in,
      text width=1in
    }
    [SGML [HTML 4.0] [XML [XHTML] [XML] [DOM] [XSL [XSLT] [XSL-FO] [XPath]] [XQuery] [DTD] [XSD] [SOAP] [WSDL] [RDF] [RSS] [SVG]]]
  \end{forest}
\end{document}