Can now save NodeGraph as asset via NodeGraphAsset

Examples/NewNodeGraph.asset.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 1452552e49747df45b25f74d307c25b6
+timeCreated: 1506021986
+licenseType: Free
+NativeFormatImporter:
+  mainObjectFileID: 11400000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Scripts/Editor/NodeEditorToolbar.cs

@@ -32,12 +32,11 @@ public partial class NodeEditorWindow {
 
     public void FileContextMenu() {
         GenericMenu contextMenu = new GenericMenu();
-        contextMenu.AddItem(new GUIContent("Create New"), false, null);
-        contextMenu.AddItem(new GUIContent("Load"), false, Load);
+        contextMenu.AddItem(new GUIContent("Create New"), false, New);
 
         contextMenu.AddSeparator("");
         contextMenu.AddItem(new GUIContent("Save"), false, Save);
-        contextMenu.AddItem(new GUIContent("Save As"), false, null);
+        contextMenu.AddItem(new GUIContent("Save As"), false, SaveAs);
 
         contextMenu.DropDown(new Rect(5f, 17f, 0f, 0f));
     }

Scripts/Editor/NodeEditorWindow.cs

@@ -2,39 +2,61 @@
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
-using System.IO;
+using System.IO; 
+using UnityEditor.Callbacks;
 
 [InitializeOnLoad]
-public partial class NodeEditorWindow : EditorWindow {
-
-    string saved;
-    
+public partial class NodeEditorWindow : EditorWindow { 
     public Dictionary<NodePort, Vector2> portConnectionPoints { get { return _portConnectionPoints; } }
     private Dictionary<NodePort, Vector2> _portConnectionPoints = new Dictionary<NodePort, Vector2>();
     private Dictionary<NodePort, Rect> portRects = new Dictionary<NodePort, Rect>();
+    public NodeGraphAsset graphAsset;
     public NodeGraph graph { get { return _graph != null ? _graph : _graph = new NodeGraph(); } }
-    public NodeGraph _graph;
+    public NodeGraph _graph; 
     public Vector2 panOffset { get { return _panOffset; } set { _panOffset = value; Repaint(); } }
-    private Vector2 _panOffset;
+    private Vector2 _panOffset; 
     public float zoom { get { return _zoom; } set { _zoom = Mathf.Clamp(value, 1f, 5f); Repaint(); } }
     private float _zoom = 1; 
 
     partial void OnEnable();
 
     [MenuItem("Window/UNEC")]
-    static void Init() {
+    static NodeEditorWindow Init() {
         NodeEditorWindow w = CreateInstance<NodeEditorWindow>();
         w.titleContent = new GUIContent("UNEC");
         w.wantsMouseMove = true;
         w.Show();
+        return w;
     }
 
     public void Save() {
-        saved = graph.Serialize();
+        if (graphAsset == null) SaveAs();
+        else if (AssetDatabase.Contains(graphAsset)) {
+            graphAsset.json = graph.Serialize();
+            EditorUtility.SetDirty(graphAsset);
+            AssetDatabase.SaveAssets();
+        }
+        else SaveAs();
     }
 
-    public void Load() {
-        _graph = NodeGraph.Deserialize(saved);
+    public void SaveAs() {
+        string path = EditorUtility.SaveFilePanelInProject("Save NodeGraph", "NewNodeGraph", "asset", "");
+        if (string.IsNullOrEmpty(path)) return;
+        else {
+            NodeGraphAsset existingGraphAsset = AssetDatabase.LoadAssetAtPath<NodeGraphAsset>(path);
+            if (existingGraphAsset != null) graphAsset = existingGraphAsset;
+            else {
+                graphAsset = new NodeGraphAsset();
+                AssetDatabase.CreateAsset(graphAsset, path);
+            }
+            graphAsset.json = graph.Serialize();
+            EditorUtility.SetDirty(graphAsset);
+            AssetDatabase.SaveAssets();
+        }
+    }
+
+    public void New() {
+        _graph = new NodeGraph();
     }
 
     private void DraggableWindow(int windowID) {
@@ -60,4 +82,15 @@ public partial class NodeEditorWindow : EditorWindow {
         selectedNode = node;
     }
 
+    [OnOpenAsset(0)]
+    public static bool OnOpen(int instanceID, int line) {
+        NodeGraphAsset nodeGraphAsset = EditorUtility.InstanceIDToObject(instanceID) as NodeGraphAsset;
+        if (nodeGraphAsset != null) {
+            NodeEditorWindow w = Init();
+            w.graphAsset = nodeGraphAsset;
+            w._graph = nodeGraphAsset.nodeGraph;
+            return true;
+        }
+        return false;
+    }
 }

Scripts/NodeGraph.cs

@@ -87,7 +87,7 @@ public class NodeGraph {
     }
 
     private class NodeTyper {
-        public string nodeType;
+        public string nodeType = "Node";
     }
 }
 

Scripts/NodeGraphAsset.cs

@@ -0,0 +1,13 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using System; 
+
+[CreateAssetMenu(fileName = "NewNodeGraph", menuName = "Node Graph")]
+public class NodeGraphAsset : ScriptableObject {
+    public string json { get { return _json; } set { _json = value; _nodeGraph = null; } }
+    [SerializeField] private string _json;
+
+    public NodeGraph nodeGraph { get { return _nodeGraph != null ? _nodeGraph : _nodeGraph = NodeGraph.Deserialize(json); } }
+    [NonSerialized] private NodeGraph _nodeGraph = null;
+}

Scripts/NodeGraphAsset.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 803fd86571b50524f807cf1e86777b1a
+timeCreated: 1506020816
+licenseType: Free
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: