diff -r 61bc0f252b2b -r bac7acad7cb3 camerauis/cameraapp/generic/inc/CamCallStateAo.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraapp/generic/inc/CamCallStateAo.h	Wed Sep 01 12:30:54 2010 +0100
@@ -0,0 +1,126 @@
+/*
+* Copyright (c) 2007 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:  Listens for changes to the call state*
+*/
+
+
+#ifndef CAMCALLSTATEAO_H
+#define CAMCALLSTATEAO_H
+
+//  INCLUDES
+#include <e32property.h>
+#include <ctsydomainpskeys.h>
+
+// CONSTANTS
+
+// MACROS
+
+// DATA TYPES
+
+// FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+
+// CLASS DECLARATION
+
+/**
+*  
+*  Mix-in class specifying the callback interface to be used with CCamCallStateAo
+*
+*  @since 3.0
+*/
+class MCamCallStateObserver
+    {
+    public:
+        /**
+        * Callback function, called when the call state changes
+        * @since 3.0
+        * @param aState The new call state
+        * @param aError The error associated with request completion
+        */    
+        virtual void CallStateChanged( TPSCTsyCallState aState, TInt aError ) = 0;
+    };
+    
+
+/**
+*  Active Object class to watch the call state
+*
+*  @since 3.0
+*/
+class CCamCallStateAo : public CActive
+
+    {
+    public:  // Constructors and destructor        
+        /**
+        * Two-phased constructor.
+        * @since 3.0
+        * @param aObserver The observer requesting callback on call events
+        * @return Constructed instance of the class
+        */
+        static CCamCallStateAo* NewL( MCamCallStateObserver* aObserver );
+            
+        /**
+        * Destructor.
+        */
+        ~CCamCallStateAo();
+        
+    protected:  // Functions from base classes        
+        /**
+        * From CActive
+        * Cancels an outstanding request
+        * @since 3.0
+        */
+    	void DoCancel();		
+
+        /**
+        * From CActive
+        * Called on completion of a request
+        * @since 3.0
+        */
+    	void RunL();
+
+        /**
+        * From CActive
+        * Called when an error occurs during a request
+        * @since 3.0
+        * @param aError The Epoc-error code for the error.
+        * @return KErrNone
+        */
+    	TInt RunError( TInt aError );    	        
+    
+    private:
+        /**
+        * C++ default constructor.
+        * @since 3.0
+        * @param aObserver The observer requesting callback on call events
+        */
+        CCamCallStateAo( MCamCallStateObserver* aObserver );
+        
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL();
+    	
+
+    public:     // Data
+        // The observer to be notified on an event
+        MCamCallStateObserver* iObserver;
+
+        // Publish and Subscribe property handle
+        RProperty iProperty;
+    };
+
+#endif      // CAMCALLSTATEAO_H
+            
+// End of File