diff -r 000000000000 -r 72b543305e3a messagingappbase/ncnlist/inc/CNcnMobileSignalStrengthHandler.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingappbase/ncnlist/inc/CNcnMobileSignalStrengthHandler.h	Thu Dec 17 08:44:11 2009 +0200
@@ -0,0 +1,176 @@
+/*
+* 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:   Signal strength handler implementation over telephony API
+*
+*/
+
+
+
+#ifndef NCNMOBILESIGNALSTRENGTHHANDLER_H
+#define NCNMOBILESIGNALSTRENGTHHANDLER_H
+
+// INCLUDES
+#include <e32base.h>
+#include <etelmm.h>
+#include "MNcnSignalStrengthHandler.h"
+
+// FORWARD DECLARATIONS
+class MNcnSignalStrengthObserver;
+
+// CLASS DECLARATION
+
+/**
+* Class implementing a signal strength handler over the telephony API
+*/
+
+class CNcnMobileSignalStrengthHandler : public CActive, public MNcnSignalStrengthHandler
+{
+    public:
+        /**
+         * Two-phased constructor.
+         */
+        static CNcnMobileSignalStrengthHandler* NewL( );
+
+        /**
+         * Destructor.
+         */
+        ~CNcnMobileSignalStrengthHandler();
+
+    private:
+        /**
+         * C++ default constructor.
+         */
+        CNcnMobileSignalStrengthHandler();
+
+        /**
+         * By default Symbian 2nd phase constructor is private.
+         */
+        void ConstructL();
+
+    public: // from CActive
+        /**
+         * RunL
+         */
+        void RunL();
+
+        /**
+         * RunError
+         * @param aError the error returned
+         *  @return error
+         */
+        TInt RunError( TInt aError );
+
+        /**
+         * DoCancel
+         */
+        void DoCancel();
+
+    public: // from MNcnSignalStrengthHandler
+        /**
+         * Returns ETrue if signal observing is supported, EFalse otherwise.
+         * @return ETrue if signal observing is supported, EFalse otherwise.
+         */
+        TBool ObservingSupported();
+        
+        /**
+         * Returns ETrue if signal strength requests are supported, EFalse otherwise.
+         * @return ETrue if signal strength requests are supported, EFalse otherwise.
+         */
+        TBool RequestsSupported();
+
+        /**
+         * Sets the signal strength observer. May leave with KErrNotSupported
+         * if signal strength observing is not supported.
+         * @param aObserver Observer for signal strength. Ownership is not passed.
+         */
+        void SetSignalStrengthObserverL( MNcnSignalStrengthObserver* aObserver );
+
+        /**
+         * Starts observing the signal strength. May leave with KErrNotSupported
+         * if signal strength observing is not supported.
+         */
+        void StartObservingL();
+ 
+        /**
+         * Stops the signal strength observing.
+         */
+        void StopObservingL();
+
+        /**
+         * Returns the current signal strength. May leave with KErrNotSupported
+         * if signal strength requests are not supported.
+         * @return The current signal strength.
+         */
+        TInt SignalStrengthL();
+        
+        /**
+         * Returns the current bar value. May leave with KErrNotSupported
+         * if bar value requests are not supported.
+         * @return The current signal strength.
+         */
+        TInt BarValueL();
+
+    private: // New methods
+
+        /**
+         * Initializes server sessions.
+         */
+        void InitializeSessionsL();
+        
+        /**
+         * Updates the current value of the signal strength.
+         */
+        void UpdateSignalStrengthL();
+        
+        /**
+         * Notifiers observer about signal strength.
+         */
+        void NotifyObserver();
+
+    private: // data
+    	/**
+         * Pointer to signal strength observer, may be NULL. Also not owned by the instance.
+         */
+        MNcnSignalStrengthObserver* iObserver;
+        
+        /**
+         * State variable for observation.
+         */
+        TBool iObserving;
+
+        /**
+         * Current value of the signal strength.
+         */
+        TInt32 iSignalStrength;
+        
+        /**
+         * Network bars value.
+         */
+        TInt8 iBars;
+        
+        /**
+         * Mobile phone.
+         */
+        RMobilePhone iMobilePhone;
+
+        /**
+         * Telephony server session.
+         */
+        RTelServer iTelServer;
+};
+
+
+#endif // NCNMOBILESIGNALSTRENGTHHANDLER_H
+
+// End of File