/*

* 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:  CSysApCenRepHacSettingObserver class definition

*

*/

#ifndef SYSAPCENREPHACSETTINGOBSERVER_H

#define SYSAPCENREPHACSETTINGOBSERVER_H

// INCLUDES

#include <e32base.h>

#include <centralrepository.h>

#include <cenrepnotifyhandler.h>

// FORWARD DECLARATIONS

class CSysApAppUi;

// CLASS DECLARATION

/**

*  CSysApCenRepHacSettingObserver

*

*  A class for receiving notifactions about HAC (Hearing Aid Compatibility)

*  CenRep-key changes

*

*  @lib   sysap

*  @since 3.1

*/

class CSysApCenRepHacSettingObserver : public CBase, public MCenRepNotifyHandlerCallback

    {

    public: // Constructors and destructor

        /**

        * Two-phased constructor

        *

        * @since S60 3.1

        * @param    aSysApAppUi    reference to SysAp's application UI class

        * @return   CSysApCenRepHacSettingObserver* a new CSysApCenRepHacSettingObserver instance

        */

        static CSysApCenRepHacSettingObserver* NewL( CSysApAppUi& aSysApAppUi );

        /**

        * Destructor.

        */

        virtual ~CSysApCenRepHacSettingObserver();

    private:

        /**

        * Symbian default constructor.

        * 

        * @since S60 3.1

        * @param None

        * @return None

        */

        void ConstructL( );

        /**

        * Constructor

        *

        * @since S60 3.1

        * @param aSysApAppUi reference to SysAp's application UI class

        * @return None

        */         

        CSysApCenRepHacSettingObserver( CSysApAppUi& aSysApAppUi );

        /**

        * C++ default constructor.

        *

        * @since S60 3.1

        * @param None

        * @return void

        */

        CSysApCenRepHacSettingObserver();

    public: // From MCenRepNotifyHandlerCallback

        void HandleNotifyInt( TUint32 aId, TInt aNewValue );

        void HandleNotifyError( TUint32 aId, TInt error, CCenRepNotifyHandler* aHandler );

    public: // Other functions

        /**

        * Returns the current HAC mode.

        *

        * @since S60 3.1

        * @param None

        * @return TInt

        */               

        TInt HacMode() const;

    private:

        // By default, prohibit copy constructor

        CSysApCenRepHacSettingObserver( const CSysApCenRepHacSettingObserver& );

        // Prohibit assigment operator

        CSysApCenRepHacSettingObserver& operator= ( const CSysApCenRepHacSettingObserver& );

    private:

        /**

        * Reference to SysAp's application UI class

        */

        CSysApAppUi& iSysApAppUi;

        /**

        * Central Repository session object which is used for accessing the

        * HAC setting value

        * Own.

        */

        CRepository* iSession;

        /**

        * Central Repository notify handler which is used for receiving notifications

        * on HAC value changes.

        * Own.

        */

        CCenRepNotifyHandler* iHacSettingHandler;

    };

#endif      // SYSAPCENREPHACSETTINGOBSERVER_H

// End of File