/*

* Copyright (c) 2005-2007 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:  CSysApAccessoryObserver class definition. This class listens to

*                changes in Accessory Mode and updates accessory specific Status

*                Pane indicators and profiles.

*

*/

#ifndef SYSAPACCESSORYOBSERVER_H

#define SYSAPACCESSORYOBSERVER_H

// INCLUDES

#include <e32base.h>

#include <AccessoryMode.h>

#include <AccessoryServer.h>

// FORWARD DECLARATIONS

class CSysApAppUi;

// CLASS DECLARATION

/**

*  CSysApAccessoryObserver class. This class observer changes in Accessory Server.

*

*  @lib   sysap

*  @since 3.1 

*/

class CSysApAccessoryObserver : public CActive 

    {

    public: // Constructors and destructor

        /**

        * EPOC default constructor.

        */

        static CSysApAccessoryObserver* NewL( CSysApAppUi& aSysApAppUi );

        /**

        * Destructor.

        */

        virtual ~CSysApAccessoryObserver();

        /**

        * Returns current accessory mode

        * 

        * @return Current accessory mode

        */

        TAccMode GetAccessoryMode() const;

    private:

        /**

        * Symbian OS default constructor.

        * @param None

        * @return void

        */

        void ConstructL( );

        /**

        * C++ default constructor.

        * @param None

        * @return void

        */

        CSysApAccessoryObserver();

        /**

        * Constructor

        * @param CSysApAppUi& aSysApAppUi

        * @return void

        */         

        CSysApAccessoryObserver( CSysApAppUi& aSysApAppUi );

        // By default, prohibit copy constructor

        CSysApAccessoryObserver( const CSysApAccessoryObserver& );

        // Prohibit assigment operator

        CSysApAccessoryObserver& operator= ( const CSysApAccessoryObserver& );

    private:

        /**

        * From CActive. Cancels the active object from observing Accessory Mode events.

        * @param None

        * @return void

        */

        void DoCancel();

        /**

        * From CActive. Gets called by active object when an alarm event occurs.

        * @param None

        * @return void

        */

        void RunL();

        /**

        * From CActive. Gets called by active object when leave happens inside RunL

        * @param TInt aError

        * @return void

        */

        TInt RunError( TInt aError );

    private:

        CSysApAppUi&         iSysApAppUi;

        RAccessoryServer     iAccessoryServer;

        RAccessoryMode       iAccessoryMode;

        TAccPolAccessoryMode iAccMode;

        /**

        * Previous accessory mode is stored for filtering out

        * notifications due change in audio output status.

        */

        TAccMode iPreviousMode;

    };

#endif      // SYSAPACCESSORYOBSERVER_H

// End of File