// 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