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

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 /**

    17  @file

    18  @publishedPartner

    19  @prototype

    20 */

    21 

    22 #ifndef __DISPLAYHANDLER_H__

    23 #define __DISPLAYHANDLER_H__

    24 

    25 /**

    26 Display request handler interface

    27 */

    28 class MDisplayHandler

    29 	{

    30 public:

    31 	/**

    32 	Process a request on this logical channel.

    33 	

    34 	@param aReqNo	Request number:

    35 			== KMaxTInt, a 'DoCancel' message

    36 			>= 0, a 'DoControl' message with function number equal to aReqNo

    37 			< 0, a 'DoRequest' message with function number equal to ~aReqNo

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

    39 			the TRequestStatus.

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

    41 			actual TAny* arguments.

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

    43 	*/

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

    45 	};

    46 

    47 #endif

    48