--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mediakeys/MMKeyBearer/inc/MMKeyBearerObserverPS.h	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,123 @@
+/*
+* 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: 
+*             Declaration of class CMMKeyBearerObserver
+*   
+*
+*/
+
+
+#ifndef __MMKEYBEAREROBSERVERPS_H__
+#define __MMKEYBEAREROBSERVERPS_H__
+
+// INCLUDE
+#include <e32svr.h>
+#include <e32property.h>
+
+// DATA TYPES
+enum TObserverKeyType
+{
+    ESideVolumeKeys = 0,
+    EMediaKeys,
+    EAccessoryVolumeKeys,
+    EFileTransferStatus
+};
+
+// CLASS DECLARATION
+/**
+*  MCallBackReceiver
+*     Used to call functions of CMMKeyBearer from CMMKeyBearerObserver
+*     On receiving event from the P & S, CMMKeyBearerObserver calls 
+*     this function
+*  @lib MMKeyBearer.dll
+*  @since 3.0
+*/
+class MCallBackReceiver
+    {
+public:
+    /**
+    Called when event has arrived from P&S.
+    @param aEnumValue: Enum value representing the key and action.
+           aKeyType : will indicate whether it is Volume key or Media key
+    */
+    virtual void ReceivedKeyEvent(TInt aEnumValue, TInt aKeyType) = 0;
+    };
+
+/**
+*  CMMKeyBearerObserver
+*     This class inplements the Active Object. There will be two instance 
+*     of this ,one for handling Volume keys and other for Media Keys
+*  @lib MMKeyBearer.dll
+*  @since 3.0
+*/
+class CMMKeyBearerObserver: public CActive
+    {
+    public: // Constructors and destructor
+        /**
+        * Creates instance of the CMMKeyBearerObserver class.
+        * @param aCallBack : reference of the class which implements 
+        *                    MCallBackReceiver for handling call back 
+        *                    functions
+        * @param aKeyType : Indiacates whether it is side volume key or 
+        *                   media key
+        * @return - Instance of the CMMKeyBearerObserver class.
+        */
+        static CMMKeyBearerObserver* NewL(MCallBackReceiver& aCallback, 
+                                          TInt aKeyType);
+        /**
+        * Destructor.
+        */
+        virtual ~CMMKeyBearerObserver();    
+    
+    public: // Base class functions - CActive
+        /** @see CActive::Start() */
+        TInt Start();
+        
+        /** @see CActive::Stop() */
+        void Stop();
+
+       /**
+        * Gets the current value.
+        * @return - The current value.
+        */
+        TInt GetValue();
+
+    private: // constructors
+        /**
+        * default constructor.
+        * @param aCallback : reference to callback class
+        */
+        CMMKeyBearerObserver(MCallBackReceiver& aCallback);
+        
+        /**
+        * Two - phase construction.
+        */
+        void ConstructL(TInt aKeyType);
+        
+    private: // Base class functions - CActive    
+        /** @see CActive::RunL() */
+        void RunL();
+        /** @see CActive::DoCancel() */
+        void DoCancel();
+        
+    private: // Data
+        
+        RProperty            iProperty;  // For P & S
+        MCallBackReceiver&   iCallback;
+        TInt                 iKeyType;   // Vol key or media Key
+    };
+
+#endif // __MMKEYBEAREROBSERVERPS_H__
+
+// End of file