Replaced hom cooked event emitter with emitter-component module

src/graph/Graph.js

@@ -197,6 +197,9 @@ function Graph (container, data, options) {
   }
 }
 
+// Extend Graph with an Emitter mixin
+Emitter(Graph.prototype);
+
 /**
  * Get the script path where the vis.js library is located
  *
@@ -508,44 +511,6 @@ Graph.prototype.setOptions = function (options) {
   this._redraw();
 };
 
-/**
- * Add event listener
- * @param {String} event       Event name. Available events:
- *                             'select'
- * @param {function} callback  Callback function, invoked as callback(properties)
- *                             where properties is an optional object containing
- *                             event specific properties.
- */
-Graph.prototype.on = function on (event, callback) {
-  var available = ['select'];
-
-  if (available.indexOf(event) == -1) {
-    throw new Error('Unknown event "' + event + '". Choose from ' + available.join());
-  }
-
-  events.addListener(this, event, callback);
-};
-
-/**
- * Remove an event listener
- * @param {String} event       Event name
- * @param {function} callback  Callback function
- */
-Graph.prototype.off = function off (event, callback) {
-  events.removeListener(this, event, callback);
-};
-
-/**
- * fire an event
- * @param {String} event   The name of an event, for example 'select'
- * @param {Object} params  Optional object with event parameters
- * @private
- */
-Graph.prototype._trigger = function (event, params) {
-  events.trigger(this, event, params);
-};
-
-
 /**
  * Create the main frame for the Graph.
  * This function is executed once when a Graph object is created. The frame

src/graph/SelectionMixin.js

@@ -213,9 +213,7 @@ var SelectionMixin = {
     this.selectionObj = {};
 
     if (doNotTrigger == false) {
-      this._trigger('select', {
-        nodes: this.getSelection()
-      });
+      this.emit('select', this.getSelection());
     }
   },
 
@@ -242,9 +240,7 @@ var SelectionMixin = {
     }
 
     if (doNotTrigger == false) {
-      this._trigger('select', {
-        nodes: this.getSelection()
-      });
+      this.emit('select', this.getSelection());
     }
   },
 
@@ -399,9 +395,7 @@ var SelectionMixin = {
       this._removeFromSelection(object);
     }
     if (doNotTrigger == false) {
-      this._trigger('select', {
-        nodes: this.getSelection()
-      });
+      this.emit('select', this.getSelection());
     }
   },
 
@@ -512,7 +506,10 @@ var SelectionMixin = {
   getSelection : function() {
     var nodeIds = this.getSelectedNodes();
     var edgeIds = this.getSelectedEdges();
-    return {nodes:nodeIds, edges:edgeIds};
+    return {
+      nodes: nodeIds,
+      edges: edgeIds
+    };
   },
 
   /**
@@ -636,7 +633,7 @@ var SelectionMixin = {
 =======
     if (changed) {
       // fire the select event
-      this._trigger('select', {
+      this.emit('select', {
         nodes: this.getSelection()
       });
     }