diff -r 000000000000 -r f72a12da539e menufw/hierarchynavigator/hnpresentationmodel/inc/hnsuiteobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnpresentationmodel/inc/hnsuiteobserver.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,77 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:   suite observer interface
+*
+*/
+
+
+
+#ifndef HNSUITEOBSERVER_H
+#define HNSUITEOBSERVER_H
+
+#include <e32def.h>
+
+/**
+ * Definition of events that are associated
+ * with the lifecycle of a suite
+ */
+enum THnCustomSuiteEvent
+    {
+        ESuitePushedToStack,
+        ESuitePoppedFromStack,
+        ESuiteModelInitialized,
+        ESuiteModelDestroyed,
+        ESuiteItemsAdded,
+        ESuiteItemsRemoved,
+        ESuiteItemsUpdated,
+        ESuiteHighlightChanged
+    };
+
+class CHnSuiteModel;
+
+/**
+ *  Suite observer interface class.
+ * 
+ *  Interface, for observers of suite events. Suite 
+ *  May inform its observers about different situation it encoutners.
+ *  e.g. suite informs all about its initialization, its deletion, 
+ *  about updates of items. 
+ *  This interface is also used by the suite container stack to inform
+ *  all interested classes of new suite being pushed or popped from the stack. 
+ * 
+ *  @lib hnpresentationmodel
+ *  @since S60 5.0
+ *  @ingroup group_hnpresentationmodel
+ */
+class MHnSuiteObserver
+    {
+    
+public:
+
+    /**
+     * Whenever an event occurs, and suite wants to notify observers,
+     * it invokes this method on all of its own observers, passing the information
+     * about the particular event as a parameter.
+     * 
+     * @param aCustomSuiteEvent Type of evetn
+     * @param aModel Suite presentation model that is notifying.
+     */
+    virtual void HandleSuiteEventL ( THnCustomSuiteEvent aCustomSuiteEvent, 
+            CHnSuiteModel *aModel ) = 0;
+    
+    };
+
+
+#endif // HNSUITEOBSERVER_H
+