fixing build errors

nodeEditor/src/diagram/graphCanvas.tsx

@@ -45,6 +45,7 @@ export class GraphCanvasComponent extends React.Component<IGraphCanvasComponentP
     private _zoom = 1;
     private _selectedNodes: GraphNode[] = [];
     private _selectedLink: Nullable<NodeLink> = null;
+    private _selectedPort: Nullable<NodePort> = null;
     private _candidateLink: Nullable<NodeLink> = null;
     private _candidatePort: Nullable<NodePort> = null;
     private _gridSize = 20;
@@ -160,16 +161,19 @@ export class GraphCanvasComponent extends React.Component<IGraphCanvasComponentP
                 this._selectedNodes = [];
                 this._selectedLink = null;
                 this._selectedFrame = null;
+                this._selectedPort = null;
             } else {
                 if (selection instanceof NodeLink) {
                     this._selectedNodes = [];
                     this._selectedFrame = null;
                     this._selectedLink = selection;
+                    this._selectedPort = null;
                 } else if (selection instanceof GraphFrame) {
                     this._selectedNodes = [];
                     this._selectedFrame = selection;
                     this._selectedLink = null;
-                } else{
+                    this._selectedPort = null;
+                } else if (selection instanceof GraphNode){
                     if (this._ctrlKeyIsPressed) {
                         if (this._selectedNodes.indexOf(selection) === -1) {
                             this._selectedNodes.push(selection);
@@ -178,6 +182,12 @@ export class GraphCanvasComponent extends React.Component<IGraphCanvasComponentP
                         this._selectedNodes = [selection];
                     }
                 }
+                else {
+                    this._selectedNodes = [];
+                    this._selectedFrame = null;
+                    this._selectedLink = null;
+                    this._selectedPort = selection;
+                }
             }
         });
 

nodeEditor/src/diagram/graphNode.ts

@@ -31,7 +31,7 @@ export class GraphNode {
     private _mouseStartPointX: Nullable<number> = null;
     private _mouseStartPointY: Nullable<number> = null    
     private _globalState: GlobalState;
-    private _onSelectionChangedObserver: Nullable<Observer<Nullable<GraphNode | NodeLink | GraphFrame>>>;   
+    private _onSelectionChangedObserver: Nullable<Observer<Nullable<GraphNode | NodeLink | GraphFrame | NodePort>>>;   
     private _onSelectionBoxMovedObserver: Nullable<Observer<ClientRect | DOMRect>>;  
     private _onFrameCreatedObserver: Nullable<Observer<GraphFrame>>;  
     private _onUpdateRequiredObserver: Nullable<Observer<void>>;  

nodeEditor/src/diagram/nodeLink.ts

@@ -13,7 +13,7 @@ export class NodeLink {
     private _nodeB?: GraphNode;
     private _path: SVGPathElement;
     private _selectionPath: SVGPathElement;
-    private _onSelectionChangedObserver: Nullable<Observer<Nullable<GraphNode | NodeLink | GraphFrame>>>;
+    private _onSelectionChangedObserver: Nullable<Observer<Nullable<GraphNode | NodeLink | GraphFrame | NodePort>>>;
     private _isVisible = true;
 
     public onDisposedObservable = new Observable<NodeLink>();