#ifndef __USB_DEVICE_WATCHER_H__

 #define __USB_DEVICE_WATCHER_H__

 /*

 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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:

 * 

 *

 */

 /**

 @file UsbDeviceWatcher.h

 */

 #include <e32base.h>

 // Forward declarations

 class RUsbHubDriver;

 namespace NUnitTesting_USBDI

 	{

 // Forward declarations

 class CUsbHostDevice;

 /**

 */

 class MUsbDeviceObserver

 	{

 public:

 	/**

 	Called when a USB device has been connected to the host

 	@param aError an error code relating to USB device attachment from the Hub driver

 	*/

 	virtual void UsbDeviceAttachedL(TInt aError) = 0;

 	};

 /**

 This class represents a watcher for USB devices inserted into the host

 */

 class CUsbDeviceWatcher : public CActive

 	{

 public:

 	/**

 	Symbian factory construction

 	@return a pointer to an instance of a Usb device watcher

 	*/

 	static CUsbDeviceWatcher* NewL(RUsbHubDriver& aUsbHubDriver,MUsbDeviceObserver& aUsbDeviceObserver);

 	/**

 	Destructor

 	*/

 	~CUsbDeviceWatcher();

 	/**

 	*/

 	void StartWatchingL(CUsbHostDevice* aUsbDevice);

 private:

 	/**

 	Cancel watching for new USB devices

 	*/

 	void DoCancel();

 	/**

 	*/

 	void RunL();

 	/**

 	@return KErrNone

 	*/

 	TInt RunError(TInt aError);

 private:

 	/**

 	Constructor

 	@param aUsbHubDriver the Host USB Hub driver

 	*/

 	CUsbDeviceWatcher(RUsbHubDriver& aUsbHubDriver,MUsbDeviceObserver& aUsbDeviceObserver);

 	/**

 	2nd phase constructor

 	*/

 	void ConstructL();

 private:

 	/**

 	The Usb hub driver (uses-a)

 	*/

 	RUsbHubDriver& iUsbHubDriver;

 	/**

 	The usb device resource (uses-a)

 	*/

 	CUsbHostDevice* iUsbHostDevice;

 	/**

 	The observer for USB device connection

 	*/

 	MUsbDeviceObserver& iUsbDeviceObserver;

 	};

 	}

 #endif