Created GraphEditorDrawer by extracting view stuff from AbstractGraphEditWindow

The latter was getting very crowded and more views that are not inside
the GraphView are on the way.

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/AbstractGraphDataSource.cs

         [SerializeField]
         private List<GraphElementData> m_TempElements = new List<GraphElementData>();
 
-        [SerializeField]
-        private TitleBarDrawData m_TitleBar;
-
+
+        [SerializeField]
+        private TitleBarDrawData m_TitleBar;
 
         public TitleBarDrawData titleBar
         {

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/AbstractGraphEditWindow.cs

 
         protected GraphView graphView
         {
-            get { return m_GraphView; }
+            get { return m_GraphEditorDrawer.GraphView; }
-        private GraphView m_GraphView;
-
-        private TitleBarDrawer m_TitleBarDrawer;
+        private GraphEditorDrawer m_GraphEditorDrawer;
 
         public virtual AbstractGraphDataSource CreateDataSource()
         {
 
         void OnEnable()
         {
-            m_GraphView = CreateGraphView();
-            m_GraphView.name = "Graph View";
-            m_TitleBarDrawer = new TitleBarDrawer(source.titleBar);
-            m_GraphView.dataSource = source;
-
-            rootVisualContainer.AddChild(m_TitleBarDrawer);
-            rootVisualContainer.AddChild(m_GraphView);
+            m_GraphEditorDrawer = new GraphEditorDrawer(CreateGraphView(), source);
+            rootVisualContainer.AddChild(m_GraphEditorDrawer);
         }
 
         void OnDisable()
 
                     var source = CreateDataSource();
                     source.Initialize(m_LastSelection);
-                    m_GraphView.dataSource = source;
-                    m_TitleBarDrawer.dataProvider = source.titleBar;
+                    m_GraphEditorDrawer.dataSource = source;
-                    m_GraphView.StretchToParentSize();
+                    //m_GraphView.StretchToParentSize();
                     Repaint();
                 }
             }

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/Drawer/GraphEditorDrawer.cs

+using System;
+using RMGUI.GraphView;
+using UnityEngine.RMGUI;
+
+namespace UnityEditor.Graphing.Drawing
+{
+    [StyleSheet("Assets/GraphFramework/SerializableGraph/Editor/Drawing/Styles/GraphEditor.uss")]
+    public class GraphEditorDrawer : DataWatchContainer
+    {
+        private GraphView m_GraphView;
+
+        public GraphView GraphView
+        {
+            get { return m_GraphView; }
+        }
+
+        private TitleBarDrawer m_TitleBarDrawer;
+
+        // TODO: Create graphView from here rather than have it passed in through constructor
+        public GraphEditorDrawer(GraphView graphView, AbstractGraphDataSource dataSource)
+        {
+            m_GraphView = graphView;
+            m_GraphView.name = "GraphView";
+            m_TitleBarDrawer = new TitleBarDrawer(dataSource.titleBar);
+            m_TitleBarDrawer.name = "TitleBar";
+
+            AddChild(m_TitleBarDrawer);
+            AddChild(m_GraphView);
+
+            this.dataSource = dataSource;
+        }
+
+        public override void OnDataChanged()
+        {
+            m_GraphView.dataSource = m_DataSource;
+            m_TitleBarDrawer.dataProvider = m_DataSource.titleBar;
+        }
+
+        private AbstractGraphDataSource m_DataSource;
+
+        public AbstractGraphDataSource dataSource
+        {
+            get { return m_DataSource; }
+            set
+            {
+                if (m_DataSource == value)
+                    return;
+
+                RemoveWatch();
+                m_DataSource = value;
+                OnDataChanged();
+                AddWatch();
+            }
+        }
+
+        protected override object toWatch
+        {
+            get { return m_DataSource; }
+        }
+    }
+}

MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/Drawer/GraphEditorDrawer.cs.meta

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MaterialGraphProject/Assets/GraphFramework/SerializableGraph/Editor/Drawing/Styles/GraphEditor.uss

+GraphEditorDrawer {
+    flex-direction: column;
+    background: #f00;
+    flex: 1;
+}
+
+GraphEditorDrawer #TitleBar {
+
+}
+
+GraphEditorDrawer #GraphView {
+    flex: 1;
+}

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MaterialGraphProject/Assets/NewUI/Editor/Demo/GraphElements/Graph.meta

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