Graphviz 嵌套子图方向

Question

我最近看到了下面的图片。我知道它是用 graphviz/dot 创建的，但源代码不可用（迷失了时间）。

期望的输出：

我一直在尝试找到一种方法来对源代码进行逆向工程，但是嵌套子图的水平顺序一直给我带来困难。在代码中，一个最基本的、大部分工作的示例看起来像这样

digraph G {
    A
    B
    subgraph cluster_0 {
        edge [style=invis]
        subgraph cluster_0_0 {
            D -> E -> F
        }
        C -> D -> E -> F -> G
    }

    A -> C
    A -> B
    A -> G
    B -> { D E F }
}

但是，这给了我这个输出：

将newrank=true 添加到外部子图中可以得到我正在寻找的水平方向：

digraph G {
    A
    B
    subgraph cluster_0 {
        newrank=true
        edge [style=invis]
        subgraph cluster_0_0 {
            D -> E -> F
        }
        C -> D -> E -> F -> G
    }

    A -> C
    A -> B
    A -> G
    B -> { D E F }
}

但这会以错误的顺序设置节点：

Answer 1

我希望有更好的解决方案，但这里有一个（其余的节点标签应该很明显）：

digraph G {
   newrank=true
   splines=false  // A->C edge gets wacky without this
   
   node [shape=Mrecord]
   // Mrecords produce this Warning:
   //   flat edge between adjacent nodes one of which has a record shape - replace records with HTML-like labels
   // but Mrecords still seem to work, so maybe ignore warning ??

   // hoped that ordering or weight or group attributes would
   // position C and G as desired, but nope
   // instead, clusters and constraint attribute worked, why?

    A [group=T label="{Measure|4/4}"]
    B [group=T]
    A -> B
    {
      rank=same C F E D G   // declare right-to-left ??
    }
    subgraph clusterCDEFG {
        graph [style=rounded]
    // within a rank, layout tends to be right-to-left
    // so, declare right-to-left ??
    // why do these clusters help position C & G ???    
       subgraph clusterG {  peripheries=0
       G 
        }
        subgraph clusterDEF {
      // declare right-to-left
      F
          E [group=T]
      D 
      edge [style=invis]
       //   D -> E -> F
        }
    // why do these clusters help position C & G ???
        subgraph clusterC { peripheries=0
       C
        }
    }

    A -> C  [constraint=false]  // why does this impact position within rank ??
    A -> G  [constraint=false]  // why does this impact position within rank ??
    B -> { F E D } // declare right-to-left ??
    edge [style=invis]
//    C -> D  // Mrecord shape has problems
//    F -> G  // Mrecord shape has problems
}

捐赠：