Changed the code to make it work with version 5.6.0b5

Author: Borealux

Assets/Clients/GraphVisualizerClient.cs

@@ -0,0 +1,45 @@
+using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine.Experimental.Director;
+
+// Bridge between runtime and editor code: the graph created in runtime code can call GraphVisualizerClient.Show(...)
+// and the EditorWindow will register itself with the client to display any available graph.
+public class GraphVisualizerClient
+{
+    private static GraphVisualizerClient s_Instance;
+    private Dictionary<PlayableGraph, string> m_Graphs = new Dictionary<PlayableGraph, string>();
+
+    public static GraphVisualizerClient instance
+    {
+        get
+        {
+            if (s_Instance == null)
+                s_Instance = new GraphVisualizerClient();
+            return s_Instance;
+        }
+    }
+    ~GraphVisualizerClient()
+    {
+        m_Graphs.Clear();
+    }
+    public static void Show(PlayableGraph graph, string name)
+    {
+        if (!instance.m_Graphs.ContainsKey(graph))
+        {
+            instance.m_Graphs.Add(graph, name);
+        }
+    }
+    public static void Hide(PlayableGraph graph)
+    {
+        if (instance.m_Graphs.ContainsKey(graph))
+        {
+            instance.m_Graphs.Remove(graph);
+        }
+    }
+
+    public static IEnumerable<KeyValuePair<PlayableGraph, string>> GetGraphs()
+    {
+        return instance.m_Graphs;
+    }
+}

Assets/Clients/GraphVisualizerClient.cs.meta

@@ -66,5 +66,10 @@ IEnumerator IEnumerable.GetEnumerator()
         {
             return m_Nodes.GetEnumerator();
         }
+
+        public bool IsEmpty()
+        {
+            return m_Nodes.Count == 0;
+        }
     }
 }

Assets/Editor/GraphVisualizer/Graph.meta

@@ -97,13 +97,13 @@ private float[] ComputeHorizontalPositionForEachLevel()
             nodes.Add(node);
             maxDepth = Mathf.Max(d, maxDepth);
         }
-            
+
         // Bake the left to right horizontal positions.
         var horizontalPositionForDepth = new float[maxDepth];
         horizontalPositionForDepth[0] = 0;
         for (int d = 1; d < maxDepth; ++d)
         {
-            IEnumerable<Node> nodesOnThisLevel = nodeDepths[d+1];
+            IEnumerable<Node> nodesOnThisLevel = nodeDepths[d + 1];
 
             int maxChildren = nodesOnThisLevel.Max(x => x.children.Count);