diff -r 25fe1fe642e3 -r b1f0785c289d messagingapp/msgsettings/msginit/inc/msignalstrengthhandler.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingapp/msgsettings/msginit/inc/msignalstrengthhandler.h	Tue Jul 13 22:09:22 2010 +0530
@@ -0,0 +1,94 @@
+/*
+* Copyright (c) 2010 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:   Interface for signal strength handler.
+*
+*/
+
+
+
+#ifndef MSIGNALSTRENGTHHANDLER_H
+#define MSIGNALSTRENGTHHANDLER_H
+
+//  INCLUDES
+#include <e32base.h>
+
+// FORWARD DECLARATIONS
+class MSignalStrengthObserver;
+
+// CLASS DECLARATION
+
+/**
+*  Interface for a class which handles changes
+*  in phone signal strength.
+*/
+class MSignalStrengthHandler
+    {
+    public:     // Constructors and destructor
+
+        /**
+        * Destructor.
+        */
+        virtual ~MSignalStrengthHandler() {};
+
+    public:     // New functions
+
+        /**
+         * Returns ETrue if signal observing is supported, EFalse otherwise.
+         * @return ETrue if signal observing is supported, EFalse otherwise.
+         */
+        virtual TBool ObservingSupported() = 0;
+        
+        /**
+         * Returns ETrue if signal strength requests are supported, EFalse otherwise.
+         * @return ETrue if signal strength requests are supported, EFalse otherwise.
+         */
+        virtual TBool RequestsSupported() = 0;
+
+        /**
+         * 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.
+         */
+        virtual void SetSignalStrengthObserverL( MSignalStrengthObserver* aObserver ) = 0;
+
+        /**
+         * Starts observing the signal strength. May leave with KErrNotSupported
+         * if signal strength observing is not supported.
+         */
+        virtual void StartObservingL() = 0;
+ 
+        /**
+         * Stops the signal strength observing.
+         */
+        virtual void StopObservingL() = 0;
+
+        /**
+         * Returns the current signal strength. May leave with KErrNotSupported
+         * if signal strength requests are not supported.
+         * @return The current signal strength.
+         */
+        virtual TInt SignalStrengthL() = 0;
+        
+        /**
+         * Returns the current bar value. May leave with KErrNotSupported
+         * if bar value requests are not supported.
+         * @return The current signal strength.
+         */
+        virtual TInt BarValueL() = 0;
+        
+    };
+
+#endif      // MSIGNALSTRENGTHHANDLER_H
+
+// End of File