使用 tikz-qtree 绘制带有旋转叶子的树

Question

我正在尝试绘制一棵树，树叶上有一些文字，我想旋转这些文字。下面的代码运行良好，只是树叶的边缘固定在树叶的右侧而不是顶部。

\documentclass{article}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{tikz-qtree}
\begin{document}

\begin{tikzpicture}
\tikzset{every leaf node/.style={font=\tiny,anchor=base west,rotate=-90}}
\tikzset{edge from parent/.style=
  {draw,
   edge from parent path={(\tikzparentnode.south)
-- +(0,-8pt)
                          -| (\tikzchildnode)}}}
\Tree [.{$\rightarrow$} 
    [.{$\land$} 
        [.{$\circlearrowleft$} {$\tau$}  {CRP} ] 
        [.{$\rightarrow$} 
            [.{$\land$} 
                [.{$\circlearrowleft$} {$\tau$}  {Leucocytes} ] 
                [.{$\circlearrowleft$} {$\tau$}  {IV Antibiotics}  {IV Liquid}  {ER Registration}  {Admission IC}  {Admission NC}  {LacticAcid}  {ER Triage}  {ER Sepsis Triage} ]
            ] 
            [.{$\times$} {Release A}  {$\tau$} ]
        ]
    ] 
    [.{$\times$} {Release C}  {Release B}  
        [.{$\rightarrow$} 
            [.{$\times$} {Release E}  {Release D}  {$\tau$} ] 
            {Return ER} 
        ] 
        {$\tau$} 
    ]
]
\end{tikzpicture}

\end{document}

其呈现形式为：

如何将边缘固定到叶子顶部？

请注意，通过改变

\tikzset{edge from parent/.style=
  {draw,
   edge from parent path={(\tikzparentnode.south)
-- +(0,-8pt)
                          -| (\tikzchildnode)}}}

到

\tikzset{edge from parent/.style=
  {draw,
   edge from parent path={(\tikzparentnode.south)
-- +(0,-8pt)
                          -| (\tikzchildnode.west)}}}

中间节点之间的边锚定在子节点的左侧。这是不受欢迎的。

Answer 1

tikz-qtree非常不灵活，所以我们需要一个既适用于未旋转节点又适用于旋转节点的锚点。我没有.north对其中一个节点使用锚点，而是对两个节点都使用锚点，并将其水平投影以对齐- 即：.west.north west.center

(\tikzchildnode.north west -| \tikzchildnode.center)

---

\documentclass[tikz, border=1 cm]{standalone}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{tikz-qtree}
\begin{document}
\begin{tikzpicture}
\tikzset{every leaf node/.style={font=\tiny,anchor=base west,rotate=-90}}
\tikzset{edge from parent/.style=
  {draw,
   edge from parent path={(\tikzparentnode.south)
-- +(0,-8pt)
                -|  (\tikzchildnode.north west -| \tikzchildnode.center)}}}
\Tree [.{$\rightarrow$} 
    [.{$\land$} 
        [.{$\circlearrowleft$} {$\tau$}  {CRP} ] 
        [.{$\rightarrow$} 
            [.{$\land$} 
                [.{$\circlearrowleft$} {$\tau$}  {Leucocytes} ] 
                [.{$\circlearrowleft$} {$\tau$}  {IV Antibiotics}  {IV Liquid}  {ER Registration}  {Admission IC}  {Admission NC}  {LacticAcid}  {ER Triage}  {ER Sepsis Triage} ]
            ] 
            [.{$\times$} {Release A}  {$\tau$} ]
        ]
    ] 
    [.{$\times$} {Release C}  {Release B}  
        [.{$\rightarrow$} 
            [.{$\times$} {Release E}  {Release D}  {$\tau$} ] 
            {Return ER} 
        ] 
        {$\tau$} 
    ]
]
\end{tikzpicture}
\end{document}