diff -r f742655b05bf -r d38647835c2e callcontinuity/vcchotrigger/inc/vccsignallevelhandler.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/callcontinuity/vcchotrigger/inc/vccsignallevelhandler.h	Wed Sep 01 12:29:57 2010 +0100
@@ -0,0 +1,213 @@
+/*
+* Copyright (c) 2008-2008 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:   Base class for the signal level handling
+*
+*/
+
+
+
+#ifndef VCCSIGNALLEVELHANDLER_H
+#define VCCSIGNALLEVELHANDLER_H
+
+#include <e32base.h>
+
+#include "vccsignallevelobserver.h"
+#include "vccunittesting.h"
+#include "vccsignallevelparams.h"
+
+/**
+ *  Base class for signal level handling.
+ *  Other classes are derived from this class.
+ *
+ *  @code
+ *
+ *  class CVccXXXSignalLevelHandler : public CVccSignalLevelHandler,
+ *                                    public MXXXOtherClass
+ *
+ *  @endcode
+ *
+ *  @lib vcchotrigger.dll
+ *  @since S60 v3.2
+ */
+class CVccSignalLevelHandler : public CTimer
+    {
+
+protected:
+
+    /** Level of the signal */
+    enum TStrengthState
+        {
+        EStrengthUnknown,
+        EStrengthLow,
+        EStrengthHigh
+        };
+
+    /** Current operation mode */
+    enum TOperation
+        {
+        EOperationNone,
+        EOperationGet,
+        EOperationWait,
+        EOperationComplete
+        };
+
+public:
+
+    /**
+    * Destructor.
+    */
+    virtual ~CVccSignalLevelHandler();
+
+    /**
+     * Start signal level observing
+     *
+     * @since S60 3.2
+     */
+    void StartL();
+
+    /**
+     * Stop signal level observing
+     *
+     * @since S60 3.2
+     */
+    void Stop();
+
+    /**
+     * Set the notification parameters
+     *
+     * @since S60 3.2
+     * @param aParams Notification parameters
+     */
+    virtual void SetParams( const TSignalLevelParams& aParams );
+
+protected:
+
+    /**
+     * C++ constructor
+     *
+     * @since S60 3.2
+     * @param aObserver Observer to be notified when signal level changes
+     * @param aParams Parameters at which level notifications should be given
+     * as well the timeout how long the signal must at the specified level or
+     * above before notification is given.
+     */
+    CVccSignalLevelHandler(
+            MVccSignalLevelObserver& aObserver,
+            const TSignalLevelParams& aParams );
+
+    /**
+     * Get the current Received Signal Strength Indicator (RSSI)
+     *
+     * @since S60 3.2
+     */
+    virtual void GetStrength() = 0;
+
+    /**
+     * Activate the notification service
+     *
+     * @since S60 3.2
+     */
+    virtual void EnableNotificationsL() = 0;
+
+    /**
+     * Cancel the notification service
+     *
+     * @since S60 3.2
+     */
+    virtual void DisableNotifications() = 0;
+
+    /**
+     * Cancel outstanding signal strentgh request.
+     *
+     * @since S60 3.2
+     */
+    virtual void CancelGetStrength() = 0;
+
+    /**
+     * Notifies the observer about signal level changes.
+     *
+     * @since S60 3.2
+     * @param aRss RSS level in absolute dBm values
+     * @param aRssClass specifies the current class of the received signal
+     */
+    virtual void NotifyChanges( TInt32 aSignalStrength,
+         MVccSignalLevelObserver::TSignalStrengthClass aClass ) = 0;
+
+    /**
+     * Handles singal strength changes which are notified by the signal level observer
+     *
+     * @since S60 3.2
+     */
+    void StrengthChanged();
+
+// from base class CTimer
+
+    /**
+     * @see CTimer::ConstructL()
+     */
+    void ConstructL();
+
+    /**
+     * From CTimer::DoCancel()
+     */
+    void DoCancel();
+
+
+private:
+
+// from base class CActive
+
+    /**
+     * From CActive::RunL()
+     */
+    void RunL();
+
+
+protected: // data
+
+    /**
+     * Observer
+     * Not own
+     */
+    MVccSignalLevelObserver& iObserver;
+
+    /**
+     * Parameters defining timers and signal levels
+     */
+    TSignalLevelParams iParams;
+
+    /**
+     * Current signal level in dBm
+     */
+    TInt32 iStrength;
+
+    /**
+     * Flag to determine if the observing/notifications are on or off
+     */
+    TBool iNotificationsOn;
+
+    /* Current operation
+    */
+   TOperation iOperation;
+
+     /* Current signal state
+     */
+    TStrengthState iState;
+ 
+
+    VCC_UNITTEST( UT_CVccWlanSignalLevelHandler )
+    VCC_UNITTEST( UT_CVccGsmSignalLevelHandler )
+    };
+
+#endif // VCCSIGNALLEVELHANDLER_H