/*

* Copyright (c) 2005 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: CLF changed item Observer.

*

*/

#ifndef __CFLDCHANGEDITEMOBSERVER_H__

#define __CFLDCHANGEDITEMOBSERVER_H__

// INTERNAL INCLUDES

// EXTERNAL INCLUDES

#include <e32base.h>

#include <MCLFChangedItemObserver.h>

// FORWARD DECLARATIONS

class CFLDFileListModel;

class CFLDWaitNote;

class CFLDController;

// CLASS DECLARATION

/**

*  CLF changed item Observer.

*  CFLDChangedItemObserver receives operation events of Content

*  Listing Framework. Operation event is generated when model

*  has been changed ( for example file has been renamed )

*/

NONSHARABLE_CLASS( CFLDChangedItemObserver )

    : public CBase,

      public MCLFChangedItemObserver

    {

    public:  // Constructors and destructor

		/**

		 * Creates and returns a new instance of this class.

		 * @return Pointer to the CFLDChangedItemObserver object

		 */

	    static CFLDChangedItemObserver* NewL();

	    /**

	     * Creates and returns a new instance of this class.

	     * @return Pointer to the CFLDChangedItemObserver object

	     */

	    static CFLDChangedItemObserver* NewL(CFLDWaitNote* aWaitNote);

        /**

        * Destructor.

        */

        virtual ~CFLDChangedItemObserver();

    private:    // Constructors

        /**

        * C++ default constructor.

        */

        CFLDChangedItemObserver();

        /**

         * C++ constructor.

         */

        CFLDChangedItemObserver(CFLDWaitNote* aWaitNote);

        /**

         * Second phase constructor

         */

        void ConstructL(CFLDWaitNote* aWaitNote );

    protected:  // Methods derived from MCLFChangedItemObserver

		void HandleItemChangeL( const TArray<TCLFItemId>& aItemIDArray );

        void HandleError( TInt aError );

	public:     // New functions

		/*

		* Sets callback instance of filelist model

		* @param aModel Instance of filelist model

		*/

		void SetFileListModel( CFLDFileListModel* aModel );

	private:  // New methods

		/**

		 * This callback method is called when the timer expires. Calls

		 * CFLDFileListModel::RefreshEntryListL().

		 * @param aPtr pointer to CFLDChangedItemObserver

		 * @return Returns always zero

		 */

		static TInt HandleModelRefreshL( TAny* aPtr );

    private:    // Data

    	/// Ref: FileList Model

    	CFLDFileListModel* iModel;

    	/// Ref: Wait note dialog for indicating refreshing process of the List Model

    	CFLDWaitNote* iWaitNote;

    	/// Own: Pointer to timer

    	CPeriodic* iTimer;

    	/// The delay in microseconds until timer expires

    	TTimeIntervalMicroSeconds32 iDelay;

    };

#endif // __CFLDCHANGEDITEMOBSERVER_H__

// End of File