/*

* Copyright (c) 2009-2010 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 for class CUsbIndicatorHandler

*

*/

#ifndef CUSBINDICATORHANDLER_H

#define CUSBINDICATORHANDLER_H

#include <bldvariant.hrh>

#include <usbstates.h>

#include <e32std.h>

#include <e32base.h>

class CHbIndicatorSymbian;

class CHbSymbianVariant;

/**

*  USB indicator handler class for device side.

*

*  This class shows USB indicator when device state changes to Configured, 

*  and hides USB indicator when device leaves Configured state. Suspended 

 * state does not change the indicator.

*

*  @since TB9.2

*/

NONSHARABLE_CLASS( CUsbIndicatorHandler ) : public CBase

    {

    friend class CtTUsbIndicatorHandler;

public:

    // Constructors and destructor

    /**

     * Destructor.

     */

    ~CUsbIndicatorHandler();

    /**

     * Two-phased constructor.

     */

    static CUsbIndicatorHandler* NewL();

    /**

     * Two-phased constructor.

     */

    static CUsbIndicatorHandler* NewLC();

private:

    /**

     * Constructor for performing 1st stage construction

     */

    CUsbIndicatorHandler();

    /**

     * EPOC default constructor for performing 2nd stage construction

     */

    void ConstructL();

public:

	/**

     * Set USB indicator (On/Off, maybe more in future) according to 

     * the change of USB device state

     *

     * @param aStateOld previous USB device state

     * @param aStateNew current USB device state

     */

    void HandleDeviceStateChangeL( TUsbDeviceState aStateOld, 

            TUsbDeviceState aStateNew, TInt aPersonality );

private:

	/**

     * Show USB connected indicator (On/Off, maybe more in future)

     *

     * @since TB9.2

     * @param aActivate activate or deactivate the indicator

     * @param aPersonality the personality id

     */

    void ShowUsbConnectedIndicatorL( TBool aActivate, TInt aPersonality );

	/**

     * Show USB addressed state indicator (On/Off, maybe more in future)

     *

     * @since TB9.2

     * @param aActivate activate or deactivate the indicator

     */    

    void ShowUsbAddressedIndicator( TBool aActivate );

private:

    /**

     * The device state before suspend.

     * Used to filter out suspend from others;

     */

    TUsbDeviceState iDevStateB4Suspend;

    CHbIndicatorSymbian* iSymbianIndicator;

    CHbSymbianVariant* iIndicatorParameters;

    // remember whether indicators are active or not

    // simplifies little bit the state handling in HandleDeviceStateChange 

    TBool iAddressedIndicatorActive;

    TBool iConnectedIndicatorActive;

    };

#endif   // CUSBINDICATORHANDLER_H

// End of File