/*

* Copyright (c) 2008 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: 

*

*/

#ifndef CAMDISKCHANGELISTENER_H

#define CAMDISKCHANGELISTENER_H

//  INCLUDES

#include <f32file.h>

// FORWARD DECLARATIONS

class MCamDriveChangeNotifierObserver;

// CLASS DECLARATION

/**

*  Mmc Change Notifier.

*

*  @since 5.0

*/

class MCamDriveChangeNotifierObserver

    {

    public:

        enum TCamDriveChangeType

            {

            EDriveDismount,

            EDriveMount

            };

    public: // New functions

        /**

        * This method is used to notify changes.

        */

        virtual TInt DriveChangeL( TCamDriveChangeType aType ) = 0;

    protected:

        /**

        * Destructor.

        */

        virtual ~MCamDriveChangeNotifierObserver() {}

    };

/**

*  Mmc Change Notifier.

*

*  @since 5.0

*/

class CCamDriveChangeNotifier : public CBase

    {

    private:

        class CCamDiskChangeListener : public CActive

            {            

            public:

                static CCamDiskChangeListener* NewLC( 

                     RFs& aFs,

                     TDriveNumber aDrive,

                     MCamDriveChangeNotifierObserver::TCamDriveChangeType aType,

                     CCamDriveChangeNotifier& aObserver );

                ~CCamDiskChangeListener();

                void Start();

                void Stop();

            protected:

                CCamDiskChangeListener( 

                     RFs& aFs,

                     TDriveNumber aDrive,

                     MCamDriveChangeNotifierObserver::TCamDriveChangeType aType,

                     CCamDriveChangeNotifier& aObserver );

            private:

                /**

                * From CActive

                */

                void DoCancel();

                /**

                * From CActive

                */

                void RunL();

            private:

                RFs& iFs;

                TDriveNumber iDrive;

                MCamDriveChangeNotifierObserver::TCamDriveChangeType iType;

                CCamDriveChangeNotifier& iObserver;

            };

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CCamDriveChangeNotifier* NewL(

                                RFs& aFs,

                                MCamDriveChangeNotifierObserver& aObserver  );

        /**

        * Destructor.

        */

        ~CCamDriveChangeNotifier();

    public:

        /**

        * Called from listeners

        */

        TInt NotifyChangeL( 

                MCamDriveChangeNotifierObserver::TCamDriveChangeType aType );

        /**

        * Called by the observer when pending dismount can be done.

        */     

        void SendAllowDismount();        

        // New functions

        void StartMonitoring();

        void CancelMonitoring();

    private:

        /**

        * C++ default constructor.

        */

        CCamDriveChangeNotifier( 

                                RFs& aFs,

                                MCamDriveChangeNotifierObserver& aObserver );

    private:    // Data

        // Ref.

        MCamDriveChangeNotifierObserver& iObserver;

        // Ref. File server session

        RFs& iFs;

        RPointerArray<CCamDiskChangeListener> iListeners;

    };

#endif      // CAMDISKCHANGELISTENER_H

// End of File