diff --git a/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/visuals/nodevisual.ts b/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/visuals/nodevisual.ts
new file mode 100644
index 0000000..677745d
--- /dev/null
+++ b/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/visuals/nodevisual.ts
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import {EventEmitter} from '@angular/core';
+import {Node} from '../models';
+
+export abstract class NodeVisual {
+    selected: boolean;
+    selectedEvent = new EventEmitter<Node>();
+
+    toggleSelected(node: Node) {
+        this.selected = !this.selected;
+        if (this.selected) {
+            this.selectedEvent.emit(node);
+        } else {
+            this.selectedEvent.emit();
+        }
+    }
+
+    deselect() {
+        this.selected = false;
+    }
+}