The Container will now test to see if any Game Object added to it is already on the display list, or not, and emit its ADDED and REMOVED events accordingly. Fix phaserjs#5267 phaserjs#3876

Author: photonstorm

src/gameobjects/container/Container.js

@@ -11,6 +11,7 @@ var Class = require('../../utils/Class');
 var Components = require('../components');
 var Events = require('../events');
 var GameObject = require('../GameObject');
+var GameObjectEvents = require('../events');
 var Rectangle = require('../../geom/rectangle/Rectangle');
 var Render = require('./ContainerRender');
 var Union = require('../../geom/rectangle/Union');
@@ -452,6 +453,12 @@ var Container = new Class({
 
             gameObject.parentContainer = this;
         }
+
+        //  Is only on the Display List via this Container
+        if (!this.scene.sys.displayList.exists(gameObject))
+        {
+            gameObject.emit(GameObjectEvents.ADDED_TO_SCENE, gameObject, this.scene);
+        }
     },
 
     /**
@@ -471,6 +478,12 @@ var Container = new Class({
         {
             gameObject.parentContainer = null;
         }
+
+        //  Is only on the Display List via this Container
+        if (!this.scene.sys.displayList.exists(gameObject))
+        {
+            gameObject.emit(GameObjectEvents.REMOVED_FROM_SCENE, gameObject, this.scene);
+        }
     },
 
     /**