--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/callcontinuity/vcc/inc/vccengpspropertylistener.h	Wed Sep 01 12:29:57 2010 +0100
@@ -0,0 +1,168 @@
+/*
+* Copyright (c) 2005-2008 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:   Active object that tracks changes on a PS property.
+*
+*/
+
+
+
+#ifndef C_VCCENGPSPROPERTYLISTENER_H
+#define C_VCCENGPSPROPERTYLISTENER_H
+
+#include <e32base.h>
+#include <e32property.h>
+
+#include "mvccengpspropertylistenerobserver.h"
+
+/*
+ *  CVccEngPsPropertyListener subsribes to the given property. It is used to 
+ *  notify its observers about the changed the value of the property.
+ *  
+ *   
+ *  @code
+ *  void CExampleClass::ConstructL()
+ * 	{
+ *   CVccEngPsPropertyListener* iPropListener = 
+ *				CVccEngPsPropertyListener::NewL( KPSVccPropertyCategory, 
+                                                 KVccPropKeyHoRequest );
+ * 	 iPropListener.AddObserver( this );
+ * 	 iPropListener.Start();
+ * 	}	
+ * 
+ * 	void CExampleClass::PropertyChangedL( 
+            const TUid aCategoryId,
+            const TUint aKeyId,
+            const TInt aValue )
+ * 	{
+        
+ *  	if( aKeyId )
+ * 			{
+ * 			switch( aValue )
+ * 				{				
+ * 				case EVccManualStartCsToPsHoRequest:
+ * 					// start CS->PS handover 
+ * 					break;
+ * 				default:
+ * 					break;
+ * 				}			
+ * 			}
+ *  }
+ *   
+ *  @endcode
+ 
+ * 
+ *  @lib hoengine.lib
+ *  @since S60 v3.2
+ */
+class CVccEngPsPropertyListener : public CActive
+    {
+public:
+
+	/**
+	 * Symbian two-phased constructor.
+     *
+     * @param aCategoryId	category uid 
+     * @param aKeyId Id of a key of the property.
+     */
+    static CVccEngPsPropertyListener* NewL( const TUid aCategoryId, 
+    										const TUint aKeyId );
+
+    /**
+     * Destructor.
+     */
+    virtual ~CVccEngPsPropertyListener();
+
+    /**
+     * Adds an observer
+     * @param aObserver Reference to observer to be added
+     */
+    void AddObserverL( MVccEngPsPropertyListenerObserver& aObserver );
+
+    /**
+     * Removes an observer
+     * @param aObserver  Reference to observer to be removed
+     */
+    void RemoveObserver( MVccEngPsPropertyListenerObserver& aObserver );
+
+    /**
+     * Get the current value of the property.
+     * @return Current key value
+     */
+    TInt CurrentValue();
+
+    /**
+     * Starts the listener.
+     */
+    void Start();
+
+private: 
+	/**
+	 * Constructor.
+	 * 
+	 * @param aPropertyUid	category uid 
+	 * @param aKeyId Id of a key of the property.
+	 */
+	CVccEngPsPropertyListener( const TUid aCategoryId, const TUint aKeyId );
+    
+	/**
+	 * 2nd phase constructor
+	 */
+ 	void ConstructL();
+ 	
+    /**
+     * Notifies the observers about the property value change.
+     * @leave Symbian error code in error case
+     */
+    void NotifyObserversL();
+
+// from base class CActive.
+
+    /**
+     * @see CActive::RunL()
+     */
+    void RunL();
+     
+    /**
+     * See CActive::DoCancel()
+     */
+    void DoCancel();
+ 
+private: //data
+
+	/**
+	 * Uid of the property category to be watched.
+	 */
+ 	TUid iCategoryId;
+ 
+ 	/**
+ 	 * The property key uid to be watched.
+ 	 */
+ 	TUint iKeyId;
+
+ 	/**
+ 	 * the property category.
+ 	 * Own
+ 	 */
+ 	RProperty iProperty;
+   
+ 	/**
+ 	 * Obsevers for callback from this.
+ 	 * Own
+ 	 */
+ 	RPointerArray<MVccEngPsPropertyListenerObserver> iObservers;
+
+    };
+
+#endif // C_VCCENGPSPROPERTYLISTENER_H
+