/*

* Copyright (c) 2009 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:

*     The header file of drive event watcher

*/

#ifndef CFMDRIVEEVENT_H

#define CFMDRIVEEVENT_H

// INCLUDES

#include <e32base.h>

#include <f32file.h>

class MFmDriveEventObserver

	{

	public:

		virtual void OnDriveAddedOrChangedL() = 0;

	};

// CLASS DECLARATION

/**

*  This class listens file system events

*

*  @lib FileManagerEngine.lib

*  @since 2.0

*/

NONSHARABLE_CLASS(CFmDriveEvent) : public CActive

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CFmDriveEvent* NewL( RFs& aFs, MFmDriveEventObserver* aObserver );

        /**

        * Destructor.

        */

        virtual ~CFmDriveEvent();

    public:

        /**

        * Sets file system event

        * @since 2.0

        */

        void Setup();

    protected:  // Functions from base classes

        /**

        * From CActive Called when asynchronous request has completed

        * @since 2.0

        */

        void RunL();

        /**

        * From CActive Called when asynchronous request has failed

        * @since 2.0

        */

        TInt RunError( TInt aError );

        /**

        * From CActive Called when asynchronous request was cancelled

        * @since 2.0

        */

        void DoCancel();

    private:

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

        /**

        * C++ default constructor.

        */

        CFmDriveEvent( RFs& aFs, MFmDriveEventObserver* aObserver );

    private:    // Data

        // Ref: Reference to opened File System session

        RFs& iFs;

        // Ref: This object is called when RunL occurs

        MFmDriveEventObserver *iObserver;

    };

#endif // CFMDRIVEEVENT_H

// End of File