/*

* Copyright (c) 2006 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:  Videoteleng Camera Preferences extension 

*

*/

#ifndef CVTENGCAMERAPREFERENCES_H

#define CVTENGCAMERAPREFERENCES_H

//  INCLUDES

#include "VtEngPanic.h"

#include "CVtEngSettings.h"

#include "VtEngUtils.h"

#include "CVtEngOperation.h"

#include <cvtlogger.h>

#include <e32base.h>

#include <mvtengcamerapreferences.h>

#include "CVtEngExtensionBase.h"

// FORWARD DECLARATIONS

class CVSDataProvider;

class MVtEngCameraPreferencesObserver;

// CLASS DECLARATION

/**

*  Videoteleng extension base class.

*

*  @lib videoteleng.lib

*  @since S60 v3.2

*/

NONSHARABLE_CLASS ( CVtEngCameraPreferences ): public CVtEngExtensionBase,

											 public MVtEngCameraPreferences

    {

    public: //Constructor and destructor.

        /**

        * Symbian two-phase constructor.

        * @return engine extension instance

        */

        static CVtEngCameraPreferences* NewL();

        /**

        * Destructor.

        */

        ~CVtEngCameraPreferences();

    public: // from base class CVtEngExtensionBase

       	/**

        * @see CVtEngExtensionBase::GetInterface

        */

        virtual TAny* GetInterface();

       	/**

        * @see CVtEngExtensionBase::HandleL

        */

        virtual TBool HandleL( CVtEngOperation* aOp );

        /**

        * @see CVtEngExtensionBase::ValidateCommand

        */

        virtual TBool ValidateCommand( const TVtEngCommandId aCommandId );

    public: // from base class MVtEngCameraPreferences

        /**

        * @see MVtEngCameraPreferences::GetColorTone

        */

        virtual TInt GetColorTone( 

        	MVtEngCameraPreferences::TColorTone& aColortone ) const; 

        /**

        * @see MVtEngCameraPreferences::GetSupportedColorTones

        */

        virtual TInt GetSupportedColorTones( 

        	TUint32& aSupportedColorTones ) const;

        /**

        * @see MVtEngCameraPreferences::GetWhiteBalance

        */

        virtual TInt GetWhiteBalance( 

        	MVtEngCameraPreferences::TWhiteBalance& aWhiteBalance ) const;     

        /**

        * @see MVtEngCameraPreferences::GetSupportedWhiteBalanceModes

        */

        virtual TInt GetSupportedWhiteBalanceModes( 

        	TUint32& aWhiteBalance ) const; 

        /**

        * @see MVtEngCameraPreferences::GetBrightness

        */  

        virtual TInt GetBrightness( TInt& aBrightness) const; 

        /**

        * @see MVtEngCameraPreferences::GetContrast

        */  

        virtual TInt GetContrast( TInt& aContrast ) const;

    public:

        /**

        * Sets data provider to camera prefefrences

        * @param aProvider pointer to current active data provider

        * @param aObserver reference to observer

        */

        virtual void SetProvider( CVSDataProvider* aProvider,

            MVtEngCameraPreferencesObserver& aObserver );

        /**

        * Detaches observer from preference instance.

        * @param aObserver reference to observer

        */

        void Detach( MVtEngCameraPreferencesObserver& aObserver );

    private:

        /*

        * C++ default constructor.

        */        

        CVtEngCameraPreferences();

        /**

        * Symbian two-phase constructor.

        */

        void ConstructL();

    private:

        // Video source data provider pointer

        CVSDataProvider* iProvider;

        // Preference observer pointer

        MVtEngCameraPreferencesObserver* iObserver;

    };

#endif //CVTENGCAMERAPREFERENCES_H