/** @file

* Copyright (c) 2005-2006 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:  Header file of the class CHttpTransferTimer.

*

*/

#ifndef C_HTTPTRANSFERTIMER_H

#define C_HTTPTRANSFERTIMER_H

// system includes

#include <e32base.h>

#include <e32cons.h>

// forward declarations

class MHttpTransferTimerObserver;

/**

 * This class is a timer that launches new transfers in CHttpUploader

 * and CHttpDownloader

 *

 *

 * @lib httptransfer.lib

 * @since S60 v3.2

 */

class CHttpTransferTimer : public CBase,

                           public MBeating

    {

public:

    /**

     * Static NewL method to construct the timer.

     *

     * @since S60 3.2

     * @param aInterval Timer interval in seconds 

     * @param aCallback The call back reference 

     * @return CHttpTransferTimer* timer instance

     */

    static CHttpTransferTimer* NewL( 

                                TInt aInterval,

                                MHttpTransferTimerObserver* aCallback );

    /**

     * Destructor

     *

     * @since S60 v3.2

     */

    virtual ~CHttpTransferTimer();

private:

    /**

     * Second phase constructor

     *

     * @since S60 v3.2

     */

    void ConstructL();

    /**

     * Constructor

     *

     * @since S60 v3.2

     * @param aInterval Interval when call back is called

     * @param aCallback Callback interface

     */

    CHttpTransferTimer( TInt aInterval,

                        MHttpTransferTimerObserver* aCallback );

private: 

// From base class MBeating

    /**

     * Called when the beat is in sync.

     *

     * @since S60 3.0

     */

    void Beat();

    /**

     * Called when the beat needs to be syncronized.

     *

     * @since S60 3.0

     */

    void Synchronize() {}

private: 

    /**

     * Heartbeat active object

     * Own.

     */

    CHeartbeat* iHeartbeat;

    /**

     * Call back pointer.

     * Not own.

     */

    MHttpTransferTimerObserver *iCallback;

    /**

     * Interval in seconds

     */

    TInt iInterval;

    /**

     * Counter

     */

    TInt iCounter;

    };

#endif // C_HTTPTRANSFERTIMER_H

// End of file