Merge pull request #291 from vidartf/mem

Ensure we dispose wrapped objects when widget is destroyed

Author: vidartf

js/src/_base/Three.js

@@ -191,6 +191,7 @@ var ThreeModel = widgets.WidgetModel.extend({
 
         this.on('change', this.onChange, this);
         this.on('msg:custom', this.onCustomMessage, this);
+        this.on('destroy', this.onDestroy, this);
 
     },
 
@@ -247,6 +248,15 @@ var ThreeModel = widgets.WidgetModel.extend({
 
     constructThreeObject: function() {},
 
+    onDestroy: function() {
+        if (this.obj) {
+            if (this.obj.dispose) {
+                this.obj.dispose();
+            }
+            delete this.obj;
+        }
+    },
+
 
     //
     // Remote execution of three.js object methods