製作樹木時更改和混合森林包中的資料夾樣式

Question

我對包裹有疑問forest。我想更改以下樹，透過將某個層級的資料夾樣式變更為交替或沿不同方向生長來節省一些垂直空間。對此，我不知道為什麼第一層不垂直對齊。

額外問題：如何可能具有交替的資料夾結構？例如

            A
            |-B
          C-|
or even   E-|-D

我想要的是這樣的東西。

這是我的 MWE：

\documentclass[tikz,multi]{standalone}
\usepackage[edges]{forest}
\usetikzlibrary{arrows.meta,shadows}

\begin{document}
    \begin{forest}
      basic/.style = {draw, thin, drop shadow, font=\sffamily},
      my root/.style = {basic, rounded corners=2pt, fill=black!2},
      upper style/.style = {basic, rounded corners=6pt, fill=black!6, text width=10.5em},
      lower style/.style = {basic, rounded corners=0pt,fill=black!10, text width=9em},
      for tree={%
        parent anchor=south,
        child anchor=north,
        edge path={
          \noexpand\path [-{Stealth[]}, \forestoption{edge}, thin]
            (!u.parent anchor) -- +(0,-5pt) -| (.child anchor)\forestoption{edge label};
        },
        /tikz/>=LaTeX,
      },
      where level=0{%
        my root,
        %for 1={%
          for tree={%
            if={level()<3}{%
              upper style,
            }{%
              lower style,
            },
            if={level()<2}{%
              if={isodd(n_children())}{%
                calign=child edge,
                calign primary child/.wrap pgfmath arg={#1}{int((n_children()+1)/2)},
              }{%
                calign=edge midpoint,
              },
            }{%
              folder,
              grow'=0,
            },
          },
      }{},
      [Alphabet
        [First five letters, folder, grow'=0,
          [A, lower style,]
          [B, lower style,]
          [C, lower style,]
          [D, lower style,]
          [E, lower style, text width=12em]
        ]
        [Some header]
        [More letters
          [Two
            [F]
            [G]
          ]
          [Nine
            [H]
            [I]
            [J]
            [K]
            [L]
            [M]
            [N]
            [O]
            [And a longer box, text width=12em]
          ]
          [Some more stuff
            [to fill]
            [this tree]
          ]
        ]
      ]
    \end{forest}
\end{document}

謝謝你的時間！

Answer 1

folder我認為，這種風格的設計並沒有真正考慮到生長方向的變化。因此，事後需要進行一些手動調整。至少，我認為最簡單的方法就是在繪製樹之前移動相關的子樹。

\documentclass[border=10pt]{standalone}
\usepackage[edges]{forest}
\usetikzlibrary{arrows.meta,shadows}
\begin{document}
\begin{forest}
  basic/.style = {draw, thin, drop shadow, font=\sffamily},
  upper style/.style = {basic, rounded corners=6pt, edge+={-Stealth, thin}, fill=black!6, text width=10.5em},
  lower style/.style = {basic, rounded corners=0pt, edge+={-, line width=.4pt}, fill=black!10, text width=9em},
  where level<=2{%
    upper style,
    edge path'={
      (!u.parent anchor) -- +(0,-5pt) -| (.child anchor)
    },
  }{%
    lower style,
  },
  where level<=1{%
    parent anchor=children,
    child anchor=parent,
    if={isodd(n_children())}{%
      calign=child edge,
      calign primary child/.process={
        O+nw+n{n children}{(#1+1)/2}
      },
    }{%
      calign=edge midpoint,
    },
  }{
    folder,
    grow'=0,
  },
  [Alphabet
    [First five letters, folder, grow'=0, for children={lower style},
      before drawing tree={
        tempdima/.option=!r2.max y,
        tempdima-/.option=max y,
        for tree={
          y+/.register=tempdima,
        },
      }
      [A]
      [B]
      [C]
      [D]
      [E, text width=12em]
    ]
    [Some header]
    [More letters
      [Two
        [F]
        [G]
      ]
      [Nine
        [H]
        [I]
        [J]
        [K]
        [L]
        [M]
        [N]
        [O]
        [And a longer box, text width=12em]
      ]
      [Some more stuff
        [to fill]
        [this tree]
      ]
    ]
  ]
\end{forest}
\end{document}

我認為，在不改變樹結構的情況下，Forest 不可能實現進一步的需求。也就是說，你可以偽造它，但你不能以一種方式放置一些孩子，而無需手動移動一組或另一組，在這一點上，放棄 Forest 並使用 Ti 可能更容易kZ直接放置所有東西。

如果您準備更改樹的結構（您甚至可以自動執行此操作，儘管除非您有很多這種模式，否則我不會打擾），您可以使用坐標節點來更改生長方向，即一些的孩子將成為他們當前父母的孫子，並且您將有一個作為他們父母的座標。然後，您需要插入另一組三個座標，使原始子代成為其原始父代的曾孫。我懷疑程式碼的額外複雜性是否值得，但這裡有一個例子。

\begin{forest}
  basic/.style = {draw, thin, drop shadow, font=\sffamily},
  upper style/.style = {basic, rounded corners=6pt, edge+={-Stealth, thin}, fill=black!6, text width=10.5em},
  lower style/.style = {basic, rounded corners=0pt, edge+={-, line width=.4pt}, fill=black!10, text width=9em},
  where level<=2{%
    upper style,
    edge path'={
      (!u.parent anchor) -- +(0,-5pt) -| (.child anchor)
    },
  }{%
    lower style,
  },
  where level<=1{%
    parent anchor=children,
    child anchor=parent,
    if={isodd(n_children())}{%
      calign=child edge,
      calign primary child/.process={
        O+nw+n{n children}{(#1+1)/2}
      },
    }{%
      calign=edge midpoint,
    },
  }{
    folder,
    grow'=0,
  },
  [Alphabet
    [First five letters, folder, grow'=0, for children={lower style},
      before drawing tree={
        tempdima/.option=!r2.max y,
        tempdima-/.option=max y,
        for tree={
          y+/.register=tempdima,
        },
      }
      [A]
      [B]
      [C]
      [D]
      [E, text width=12em]
    ]
    [Some header]
    [More letters
      [Two
        [F]
        [G]
      ]
      [Nine
        [H]
        [I]
        [J]
        [K]
        [, coordinate, grow'=-90, for descendants={edge path'={(!u.parent anchor) |- (.child anchor)}}, before packing={calign primary child=2}
          [, coordinate
            [And a longer box, text width=12em]
          ]
          [, coordinate
            [N]
            [O]
          ]
          [, coordinate
            [L]
            [M]
          ]
        ]
      ]
      [Some more stuff
        [to fill]
        [this tree]
      ]
    ]
  ]
\end{forest}

順便問一下，為什麼你想要一些邊緣是常規寬度而另一些thin是？雖然我把它保存在這裡，但我認為這是一個奇怪的想法。