apply upstream PRs alelievr#232 and alelievr#222; bump version to 1.4.1

- Make BaseGraphView.CanConnectEdge virtual (upstream alelievr#232), so
  subclasses can override edge-connection validation without forking.
- Change nodeTypePerCreateAssetType to a SortedDictionary with a
  subclass-priority comparer (upstream alelievr#222), so dragging an asset
  whose type has multiple matching ICreateNodeFrom<T> implementations
  picks the most derived one instead of an arbitrary insertion-order
  match.

Author: dyonng

Assets/com.dyonng.NodeGraphProcessor/Editor/Views/BaseGraphView.cs

@@ -133,7 +133,15 @@ protected NodeInspectorObject		nodeInspector
 
 		HashSet<BaseNodeView>		selectionScratchSet = new HashSet<BaseNodeView>();
 
-		Dictionary<Type, (Type nodeType, MethodInfo initalizeNodeFromObject)> nodeTypePerCreateAssetType = new Dictionary<Type, (Type, MethodInfo)>();
+		SortedDictionary<Type, (Type nodeType, MethodInfo initalizeNodeFromObject)> nodeTypePerCreateAssetType = new SortedDictionary<Type, (Type, MethodInfo)>(
+			// Sort by order of inheritances, so that the descendant type is prioritized over the ascendant type.
+			// Otherwise, sort by name.
+			Comparer<Type>.Create((Type x, Type y) => {
+				if (x.IsSubclassOf(y)) return -1;
+				else if (y.IsSubclassOf(x)) return 1;
+				else return x.FullName.CompareTo(y.FullName);
+			})
+		);
 
 		public BaseGraphView(EditorWindow window)
 		{
@@ -1182,7 +1190,7 @@ public void RemoveGroups()
 			groupViews.Clear();
 		}
 
-		public bool CanConnectEdge(EdgeView e, bool autoDisconnectInputs = true)
+		public virtual bool CanConnectEdge(EdgeView e, bool autoDisconnectInputs = true)
 		{
 			if (e.input == null || e.output == null)
 				return false;

Assets/com.dyonng.NodeGraphProcessor/package.json

@@ -1,7 +1,7 @@
 {
     "name": "com.dyonng.node-graph-processor",
     "displayName": "Node Graph Processor",
-    "version": "1.4.0",
+    "version": "1.4.1",
     "unity": "6000.5",
     "description": "Node graph editor framework focused on data processing using Unity UIElements and C# 4.7",
     "keywords": [