∞ /notes/uml-activity-diagrams-with-graphviz | 2006-11-17 | programming

UML Activity Diagrams with GraphViz

Cross-posted to: https://fsteeg.wordpress.com/2006/11/16/uml-activity-diagrams-with-graphviz/

Activity diagrams are somewhat doable with GraphViz, they just don't look very nice, some straight edges would be nice. And especially, only new versions of GraphViz support that tailport thing... code and rendered result below.

digraph untitled {
  rankdir=TD
  size="4,4"
  edge[fontsize="11" arrowhead=open]
  start[shape=circle, label="", style=filled]
  end[shape=doublecircle, label="", style=filled]
  action1[shape=box,style=rounded, label="action"]
  action2[shape=box,style=rounded, label="action"]
  action3[shape=box,style=rounded, label="action"]
  if1[shape=diamond, label="decision"]
  if2[shape=diamond, label="decision"]
  start-> action1
  action1->if1[headport=n]
  if1-> action2[label="condition" tailport=w]
  if1-> action3[taillabel="condition" labeldistance=2.5 tailport=e]
  action2->if2[headport=w]
  action3->if2[headport=e]
  if2->end[taillabel="condition"]
}