diff -r 000000000000 -r 72b543305e3a messagingappbase/ncnlist/inc/MNcnSignalStrengthObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingappbase/ncnlist/inc/MNcnSignalStrengthObserver.h	Thu Dec 17 08:44:11 2009 +0200
@@ -0,0 +1,53 @@
+/*
+* Copyright (c) 2004 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:   Observer for ncnlists abstract signal strength handler
+*
+*/
+
+
+
+#ifndef MNCNSIGNALSTRENGTHOBSERVER_H
+#define MNCNSIGNALSTRENGTHOBSERVER_H
+
+//  INCLUDES
+#include <e32base.h>
+
+// CLASS DECLARATION
+
+/**
+*  Interface for a class which observes if there are any changes
+*  in phone signal strength.
+*/
+class MNcnSignalStrengthObserver
+    {
+    public:     // Constructors and destructor
+
+        /**
+        * Destructor.
+        */
+        virtual ~MNcnSignalStrengthObserver() {};
+
+    public:     // New functions
+
+        /**
+         * Notifies about updates in signal bars and strength.
+         * @param aNewSignalValue New value for the signal strength.
+         * @param aNewBarValue New value for the signal bars.
+         */
+        virtual void SignalStrengthAndBarUpdatedL( TInt aNewSignalValue, TInt aNewBarValue ) = 0;
+    };
+
+#endif      // MNCNSIGNALSTRENGTHOBSERVER_H
+
+// End of File