diff -r 000000000000 -r 5e5d6b214f4f instantmessagesalert/inc/cimalertpropertyobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/instantmessagesalert/inc/cimalertpropertyobserver.h	Tue Feb 02 10:12:18 2010 +0200
@@ -0,0 +1,119 @@
+/*
+* Copyright (c) 2009 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:  Publish & Subscribe property change observer
+*
+*/
+
+#ifndef CIMALERTPROPERTYOBSERVER_H
+#define CIMALERTPROPERTYOBSERVER_H
+
+//  INCLUDES
+#include <e32base.h>        // CActive
+#include <e32property.h>    // RProperty
+
+#include "mimalertpropertynotificationobserver.h"
+
+
+// CLASS DECLARATION
+
+/**
+*  Implementation of the Publish & Subscribe property change observer
+*
+*  @lib MGXMediaFileAPI.lib
+*  @since 2.6
+*/
+NONSHARABLE_CLASS(CIMAlertPropertyObserver) : public CActive
+    {
+    public:  // Constructors and destructor
+
+        /**
+        * Two-phased constructor.
+        * @param aObserver Observer to be informed when observed 
+        *                  property changes
+        */
+        static CIMAlertPropertyObserver* NewL( 
+                MIMAlertPropertyNotificationObserver& aObserver );
+
+        /**
+        * Destructor.
+        */
+        virtual ~CIMAlertPropertyObserver();
+
+    public:     // New functions
+
+        /**
+        * Starts observing the given key for any changes
+        * Notifies the observer when the property changes
+        * @since 2.6
+        * @param aCategory, Category of the observed property
+        * @param aKey, Observed property
+        */
+        void ObservePropertyChangeL( TUid aCategory, TUint aKey );
+
+        /**
+        * Stops observing the key given with call ObserverPropertyChangeL
+        */
+        void CancelObserve( );
+
+        /**
+        * Gets the uid this observer is observing
+        * @return the category
+        */
+        TUid Category();
+
+        /**
+        * Gets the uid this observer is observing
+        * @return the key
+        */
+        TUint Key();
+
+
+    protected:  // Functions from base classes
+
+        /**
+        * From CActive
+        */
+        void RunL();
+
+        /**
+        * From CActive
+        */
+        void DoCancel();
+
+    private:
+
+        /**
+        * C++ default constructor.
+        */
+        CIMAlertPropertyObserver( MIMAlertPropertyNotificationObserver& aObserver );
+
+
+    private:    // Data
+
+        // Owns: Observed property
+        RProperty iProperty;
+
+        // Observer to be informed when property changes
+        MIMAlertPropertyNotificationObserver& iObserver;
+
+		// the category this observer is attached to
+		TUid iCategory;
+		// the key this observer is attached to
+		TUint iKey;
+
+    };
+
+#endif      // CIMALERTPROPERTYOBSERVER_H
+
+// End of File