如何在 graphviz 中设置三车道 layout/ranking？

Question

我必须每周多次创建流程图。我研究了 graphviz 以减少这个过程的麻烦。我刚开始学习它，它真的很棒。但是，我不知道如何使用子图来创建我想要的布局。

我想要一个带有流程图的“通道”/“行”
我想要一个带有注释的“车道”/“行”，该步骤在时刻
我想要一个“车道”/“行”，其中包含有关进程

我尝试摆弄子图，但那没有用。有什么办法可以做到这一点？这是示例代码。我还添加了一张图片来说明我想要实现的目标：

digraph{
graph[rankdir =LR]

// the steps
subgraph steps{
node[shape = box]
S_1[label="Step 1"];
S_2[label = "Step 2"];
S_3[label = "Step ..."];
S_4[label = "Step k"]


S_1 -> S_2 -> S_3 -> S_4;
}

// the problems
subgraph problem {
node[shape = box, color = "red",fontsize = 8]
S_1p[label= "This is not working\nat all. People simply skip this\nstep."]
S_3p[label  = "Instead of changing\nthe session setting,\nusers simply call colleagues via phone"]

S_1p->S_1 //argh
S_3p -> S_3 //argh
}



//the notes
subgraph notes{
 node[shape = plaintext, color = "black",fontsize = 8]

 S_1n[label="This is really important additional information"]
 S_3n[label="This one as well"]

 S_1n -> S_1;
 S_3n -> S_3;
}

}

Answer 1

子图和簇子图很容易混淆。请参阅 https://www.graphviz.org/pdf/dotguide.pdf
没有直接的方法来排序或调整簇的大小，您需要不可见的节点和边。痛
这个结果是~接近，但紫色边缘不是最理想的！（在我看来）。 Dot 努力不在节点或其他结构的顶部绘制边。对不起。

 // graph[rankdir =LR]  << use default TB 
 graph [newrank=true]  // dang, does not help the curvy edges
 // the steps
 subgraph cluster_steps{
 {
  rank=same // keep horizontal
  node[shape = box]
  S_1[label="Step 1"];
  S_2[label = "Step 2"];
  S_3[label = "Step ..."];
  S_4[label = "Step k"]

  invisA[shape=point style=invis group=I]
  invisA -> S_1 [style=invis]
  //edge [constraint=false]
  S_1 -> S_2 -> S_3 -> S_4;
  }
 }

 // the problems
 subgraph cluster_problem {
 {
  rank=same // keep horizontal
  node[shape = box, color = "red",fontsize = 8]
  S_1p[label= "This is not working\nat all. People simply skip this\nstep."]
  S_3p[label  = "Instead of changing\nthe session setting,\nusers simply call colleagues via phone"]

  invisB[shape=point style=invis group=I]
  invisB-> S_1p  [style=invis]

  edge [constraint=false color=red]
  S_1p->S_1   //argh  << pirate talk??
  S_3p -> S_3 //argh
  }
}
 //the notes
 subgraph cluster_notes{
 {
  rank=same // keep horizontal
  node[shape = plaintext, color = "black",fontsize = 8]

  S_1n[label="This is really important additional information"]
  S_3n[label="This one as well"]

  invisC[shape=point style=invis group=I]
  invisC-> S_1n [style=invis]

  edge [constraint=false color=purple]  
  S_1n -> S_1;
  S_3n -> S_3;
  }
 }
 edge[style=invis]
 invisA ->  invisB ->  invisC
 }

给予：

如何在 graphviz 中设置三车道 layout/ranking？

How do I set a three lane layout/ranking in graphviz?

layout

dot

graphviz

rank