/*
* 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:  Observes Remote Controller Framework for volume key presses*
*/


#ifndef CAMVOLKEYOBSERVER_H
#define CAMVOLKEYOBSERVER_H

// INCLUDES
#include <remconcoreapitargetobserver.h>
#include "CamZoomPane.h"
  
// FORWARD DECLARATIONS
class CRemConInterfaceSelector;
class CRemConCoreApiTarget;
class CCamRemConKeyResponse;
class CCamZoomPane;

/**
* Observer interface for volume key events
* 
* since @3.1
*
*/
class MCamVolumeKeyObserver
	{
public:
	/**
	* Report volume keys events to observer
	* @since 3.1
	* @param aOperationId Volume key up Volume key down event
	* @param aButtonAct button action (press, release, click)
	*/
	virtual void HandleVolumeKeyEvent( TRemConCoreApiOperationId aOperationId,
                            			TRemConCoreApiButtonAction aButtonAct ) = 0;
	};

// CLASS DECLARATION

/**
*  Observes Remote Controller Framework
*  
*  @since 3.1
*/
class CCamRemConObserver 
    : public CBase, public MRemConCoreApiTargetObserver
    {
    public:  // Constructors and destructor      
        
        /**
        * Two-phased constructor.
        * @param aZoomPane zoom pane instance
        * @return new instance.
        */
        static CCamRemConObserver* NewL( MCamVolumeKeyObserver& aObserver );

        /**
        * Destructor.
        */
        ~CCamRemConObserver();

    public: // New functions
        
    protected:

        /**
        * from MRemConCoreApiTargetObserver interface class.
        * A command has been received. 
        * @param aOperationId The operation ID of the command.
        * @param aButtonAct The button action associated with the command.
        */
        void MrccatoCommand( TRemConCoreApiOperationId aOperationId, 
                             TRemConCoreApiButtonAction aButtonAct );

        /**
        * from MRemConCoreApiTargetObserver interface class.
        * not used
        */
        void MrccatoPlay(TRemConCoreApiPlaybackSpeed aSpeed, 
		                        TRemConCoreApiButtonAction aButtonAct);

        /**
        * from MRemConCoreApiTargetObserver interface class.
        * not used
        */
        void MrccatoTuneFunction(TBool aTwoPart, 
                        		TUint aMajorChannel, 
                        		TUint aMinorChannel,
                        		TRemConCoreApiButtonAction aButtonAct);

        /**
        * from MRemConCoreApiTargetObserver interface class.
        * not used
        */
        void MrccatoSelectDiskFunction(TUint aDisk,
                        		TRemConCoreApiButtonAction aButtonAct);
	
        /**
        * from MRemConCoreApiTargetObserver interface class.
        * not used
        */
        void MrccatoSelectAvInputFunction(TUint8 aAvInputSignalNumber,
                        		TRemConCoreApiButtonAction aButtonAct);

        /**
        * from MRemConCoreApiTargetObserver interface class.
        * not used
        */
        void MrccatoSelectAudioInputFunction(TUint8 aAudioInputSignalNumber,
                        		TRemConCoreApiButtonAction aButtonAct);

    private:

        /**
        * C++ default constructor.
        * @since 3.1
        * @param aZoomPane instance of zoom pane
        */
        CCamRemConObserver( MCamVolumeKeyObserver& aObserver );

        /**
        * By default Symbian 2nd phase constructor is private.
        */
        void ConstructL();
        
    private:    // Data
        
        // Remote Controller
        CRemConInterfaceSelector* iInterfaceSelector;  
        
        // Remote Controller
        CRemConCoreApiTarget* iCoreTarget;
        
        // Key response
        CCamRemConKeyResponse* iActiveRemCon;
        
        // zoom pane
        MCamVolumeKeyObserver& iObserver;
    };

#endif      // CAMVOLKEYOBSERVER_H
            
// End of File