// 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 "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

 @publishedPartner

 @prototype

*/

#ifndef __DISPLAYHANDLER_H__

#define __DISPLAYHANDLER_H__

/**

Display request handler interface

*/

class MDisplayHandler

	{

public:

	/**

	Process a request on this logical channel.

	@param aReqNo	Request number:

			== KMaxTInt, a 'DoCancel' message

			>= 0, a 'DoControl' message with function number equal to aReqNo

			< 0, a 'DoRequest' message with function number equal to ~aReqNo

	@param a1		First argument. For DoRequest requests this is a pointer to

			the TRequestStatus.

	@param a2     Second argument. For DoRequest this is a pointer to the 2

			actual TAny* arguments.

	@return	Result. Ignored by device driver framework for DoRequest requests.

	*/

	virtual TInt HandleRequest(TInt aReqNo, TAny* a1, TAny* a2) = 0;

	};

#endif