/*

* 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 C_CAMMCWATCHER_H

#define C_CAMMCWATCHER_H

#include <e32base.h>

#include <f32file.h>

/**

 *  Interface for observing MMC events.

 *

 *  @since S60 S60 v3.1

 */

class MMmcWatcherCallback

    {

public:

    /**

     * MmcChangeL is called when the MMC is removed or inserted.

     */

    virtual void MmcChangeL() = 0;

    };

/**

 *  This active object waits for an indication that the media has changed.

 *

 *  @since S60 S60 v3.1

 */

NONSHARABLE_CLASS( CCaMmcWatcher ) : public CActive

    {

public:

    /**

    * Two-phased constructor.

    * @param aObserver Pointer to notifier interface.

    * @param aFs file server session.

    */

IMPORT_C static CCaMmcWatcher* NewL( RFs& aFs,

            MMmcWatcherCallback* aObserver );

    /**

    * Two-phased constructor.

    * @param aObserver Pointer to notifier interface.

    * @param aFs file server session.

    */

IMPORT_C static CCaMmcWatcher* NewLC( RFs& aFs,

            MMmcWatcherCallback* aObserver );

    /**

    * Destructor

    */

    ~CCaMmcWatcher();

private:

    /**

    * C++ default constructor

    * @param aObserver Pointer to notifier interface.

    * @param aFs file server session.

    */

    CCaMmcWatcher( RFs& aFs, MMmcWatcherCallback* aObserver );

    /**

    * By default Symbian OS constructor is private.

    */

    void ConstructL();

    /**

    * Set notification request

    */

    void WaitForChangeL();

    /**

    * From CActive.

    */

    void DoCancel();

    /**

    * From CActive.

    */

    void RunL();

    /**

     * From CActive.

     */

    TInt RunError( TInt aError );

private:

    /**

     * File server session.

     * Not Own

     */

    RFs iFs;

    /**

     * MMC events observer

     * Not own.

     */

    MMmcWatcherCallback* iObserver;

    };

#endif      // C_CAMMCWATCHER_H