sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @publishedPartner
sl@0:  @prototype
sl@0: */
sl@0: 
sl@0: #ifndef __DISPLAYHANDLER_H__
sl@0: #define __DISPLAYHANDLER_H__
sl@0: 
sl@0: /**
sl@0: Display request handler interface
sl@0: */
sl@0: class MDisplayHandler
sl@0: 	{
sl@0: public:
sl@0: 	/**
sl@0: 	Process a request on this logical channel.
sl@0: 	
sl@0: 	@param aReqNo	Request number:
sl@0: 			== KMaxTInt, a 'DoCancel' message
sl@0: 			>= 0, a 'DoControl' message with function number equal to aReqNo
sl@0: 			< 0, a 'DoRequest' message with function number equal to ~aReqNo
sl@0: 	@param a1		First argument. For DoRequest requests this is a pointer to
sl@0: 			the TRequestStatus.
sl@0: 	@param a2     Second argument. For DoRequest this is a pointer to the 2
sl@0: 			actual TAny* arguments.
sl@0: 	@return	Result. Ignored by device driver framework for DoRequest requests.
sl@0: 	*/
sl@0: 	virtual TInt HandleRequest(TInt aReqNo, TAny* a1, TAny* a2) = 0;
sl@0: 	};
sl@0: 
sl@0: #endif
sl@0: