/*

* Copyright (c) 2002 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: 

*     MFLDFileListBoxObserver defines an abstract interface to observe

*     file list box events.

*

*/

#ifndef __MFLDFILELISTBOXOBSERVER_H__

#define __MFLDFILELISTBOXOBSERVER_H__

// INTERNAL INCLUDES

// EXTERNAL INCLUDES

#include <e32base.h>

//  FORWARD DECLARATIONS

class RWindow;

// CLASS DEFINITION

/**

* MFLDFileListBoxObserver defines an abstract interface to observe

* file list box events.

*/

class MFLDFileListBoxObserver

    {

    public:     // Enumerations

        enum TFileListBoxEvent

            {

            EFocusChanged = 1,

            EListBoxClosed,

            EOtherKeyEvent,

            EVideoPreview,

            EVideoPreviewSelected,

            EVideoPreviewCanceled

            };

		enum TFileListSoftKeyState

		    {

   		    EToneSelectionSoftKeyState = 1,

		    EPreviewSoftKeyState,

		    EPreviewSelectSoftKeyState

    		};

    protected:  // Constructors and destructors

        /**

        * Destructor.

        */

        virtual ~MFLDFileListBoxObserver() {}

    public:     // New methods

        /**

        * Receives information about a file list box event

        * @param aEvent The event type that happened

        * @param aFileName The file name that is currently focused, or KNullDesC

        * construct different components using existing window.

		*/

        virtual void HandleFileListBoxEventL( TFileListBoxEvent aEvent,

            const TDesC& aFileName = KNullDesC ) = 0;

        /**

        * Method for listbox to receive current state of the softkeys.

        * @param aSoftKeyState This parameter will return the softkey state

        * TFileListSoftKeyState as a return parameter

		*/

        virtual void HandleSoftKeyState( TFileListSoftKeyState& aSoftKeyState ) = 0;

    };

#endif      //  __MFLDFILELISTBOXOBSERVER_H__

// End of File