#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