/*

* Copyright (c) 2008-2009 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:  timer

 *

*/

#ifndef C_USBTIMER_H

#define C_USBTIMER_H

#include <e32base.h>

class CUsbTimer;

/**

 * timer ids for usbotgwatcher

 */

enum TUsbTimerId

    {

    EDeviceAttachmentTimer,

    EInactiveTimer,

    EIconBlinkingTimer,

    ETooMuchPowerRequiredTimer

    };

/**

 * Observers gets feedback by implementing this interface

 */

class MUsbTimerObserver

    {

    friend class CtUsbOtgWatcher;

public:

    /**

     * Observer must implement this interace

     * which is called back when timer expires

     * @param timer id

     */

    virtual void TimerElapsedL(TUsbTimerId aTimerId) = 0;

    };

/* *

 * Wrapper class, will report to MUsbTimerObserver once time is over

 * Name CUsbTimer is given due to CTimer name already used

 */

NONSHARABLE_CLASS(CUsbTimer) : public CActive

    {

public:

    /**

     * Two-phased constructor

     *

     * @param aObserver will get call back

     * @param aTimerId timer id

     */

    static CUsbTimer * NewL(MUsbTimerObserver* aObserver,

            TUsbTimerId aTimerId);

    /**

     * Destructor.

     */

    virtual ~CUsbTimer();

    /**

     * calls RunL after aMilliseconds

     * @param aMilliseconds time in millisecs

     */

    void After(TInt aMilliseconds);

public:

    // from base class CActive

    /**

     * Called when request is completed

     */

    void RunL();

    /**

     * called when RunL leaves

     * @param aError error code

     * @return error code

     */

    TInt RunError(TInt aError);

    /**

     * Called when request is cancelled

     */

    void DoCancel();

private:

    /**

     * Default constructor

     * @param aObserver will get call back

     * @param aTimerId timer id 

     */

    CUsbTimer(MUsbTimerObserver* aObserver, TUsbTimerId aTimerId);

    /**

     * 2nd phase construction

     */

    void ConstructL();

private:

    // data

    /**

     * Observer

     * not own

     */

    MUsbTimerObserver* iObserver;

    /**

     * RTimer API

     */

    RTimer iTimer;

    /**

     * timer id

     */

    TUsbTimerId iTimerId;

    };

#endif //  C_USBTIMER_H