sl@0: /*
sl@0: * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description:   Definition of the event observer class
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifndef CAUDIOEQUALIZEREVENTOBSERVER_H
sl@0: #define CAUDIOEQUALIZEREVENTOBSERVER_H
sl@0: 
sl@0: // INCLUDES
sl@0: #include <e32base.h>
sl@0: #include "AudioEqualizerProxy.h"
sl@0: 
sl@0: 
sl@0: // CLASS DECLARATION
sl@0: 
sl@0: /**
sl@0: *  AudioEqualizer event observer provides encapsulates a monitoring request towards the message handler.
sl@0: *
sl@0: *  @lib AudioEqualizerProxy.lib
sl@0: *  @since 3.0
sl@0: */
sl@0: class CAudioEqualizerEventObserver : public CActive
sl@0:     {
sl@0:     public: // Constructors and destructor
sl@0: 
sl@0:         /**
sl@0:         * Two-phased constructor.
sl@0:         */
sl@0:         static CAudioEqualizerEventObserver* NewL(TMMFMessageDestinationPckg aMessageHandler, MCustomCommand& aCustomCommand,
sl@0:         								  		  MAudioEqualizerCallback& aCallback);
sl@0: 
sl@0:         /**
sl@0:         * Destructor.
sl@0:         */
sl@0:         virtual ~CAudioEqualizerEventObserver();
sl@0: 
sl@0:     public: // New functions
sl@0: 
sl@0:         /**
sl@0:         * Start event monitoring
sl@0:         * @since 3.0
sl@0:         */
sl@0:         void Start();
sl@0: 
sl@0:        	/**
sl@0:         * Stop event monitoring
sl@0:         * @since 3.0
sl@0:         */
sl@0:         void Stop();
sl@0: 
sl@0: 
sl@0:     private:
sl@0: 
sl@0:         /**
sl@0:         * C++ default constructor.
sl@0:         */
sl@0:         CAudioEqualizerEventObserver();
sl@0: 
sl@0:         /**
sl@0:         * By default Symbian 2nd phase constructor is private.
sl@0:         */
sl@0:         void ConstructL(TMMFMessageDestinationPckg aMessageHandler, MCustomCommand& aCustomCommand,
sl@0:         				MAudioEqualizerCallback& aCallback);
sl@0: 
sl@0:         void RunL();
sl@0: 
sl@0:         void DoCancel();
sl@0: 
sl@0:     private:
sl@0: 
sl@0: 		// Pointer to custom command utility
sl@0: 		MCustomCommand* iCustomCommand;
sl@0: 		// Message handler handle
sl@0: 		TMMFMessageDestinationPckg iMessageHandler;
sl@0: 		// AudioEqualizer change event Callbacks
sl@0: 		MAudioEqualizerCallback* iCallback;
sl@0: 		// Data package received from server
sl@0: 		TEfAudioEqualizerCombinedDataPckg iDataPckgFrom;
sl@0: 		//
sl@0: 		TBool iStopped;
sl@0: 	};
sl@0: 
sl@0: #endif 		// CAUDIOEQUALIZEREVENTOBSERVER_H
sl@0: