windowing/windowserver/inc/Graphics/wsdisplaycontrol.h
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     1 // Copyright (c) 2008-2009 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 // Interface for Render Stage Display Resolution
       
    15 // 
       
    16 //
       
    17 
       
    18 #ifndef WSDISPLAYCONTROL_H_
       
    19 #define WSDISPLAYCONTROL_H_
       
    20 
       
    21 /**
       
    22 @file
       
    23 @publishedpartner 
       
    24 @released
       
    25 */
       
    26 
       
    27 #include <graphics/displaycontrolbase.h>
       
    28 #include <graphics/wsgraphicdrawerinterface.h>
       
    29 
       
    30 class MWsDisplayControl: public MWsObjectProvider,public MDisplayControlBase
       
    31 	{
       
    32 public:
       
    33 	enum	
       
    34 		{
       
    35 		KUidWsDisplayControl =  0x10286497, 	  //To    0x1028649A
       
    36 		ETypeId=				KUidWsDisplayControl,
       
    37 		EWsObjectInterfaceId=	KUidWsDisplayControl
       
    38 		};
       
    39 public:
       
    40 	/**
       
    41 	 * Asynchronous request to complete aStatus when a change of display is detected.
       
    42 	 * 
       
    43 	 * The request is completed when the connectedness of the display changes, or when
       
    44 	 * the set of available resolutions changes.
       
    45 	 * 
       
    46 	 * @param aStatus Asynchronous request status.
       
    47 	 */
       
    48 	virtual void NotifyOnDisplayChange(TRequestStatus& aStatus)=0;
       
    49 	/**
       
    50 	 * Cancels a pending request to notify on display change.
       
    51 	 * 
       
    52 	 * If there is a pending notification request, the status value will be set to 
       
    53 	 * KErrCancelled and it will be completed. If there is no pending request for 
       
    54 	 * notification, the call will simply return.
       
    55 	 */
       
    56 	virtual void NotifyOnDisplayChangeCancel()=0;
       
    57 	/**
       
    58 	 * Asynchronous request to complete aStatus when a configuration change occurs.
       
    59 	 * 
       
    60 	 * The request is completed when a new configuration has been set, either 
       
    61 	 * explicitly or by a render stage. Earlier render stages and the Window Server 
       
    62 	 * can use this to update their state.
       
    63 	 * 
       
    64 	 * @param aStatus Asynchronous request status.
       
    65 	 */
       
    66 	virtual void NotifyOnConfigChange(TRequestStatus& aStatus)=0;
       
    67 	/**
       
    68 	 * Cancels a pending request to notify on configuration change.
       
    69 	 * 
       
    70 	 * If there is a pending notification request, the status value will be set to 
       
    71 	 * KErrCancelled and it will be completed. If there is no pending request for 
       
    72 	 * notification, the call will simply return.
       
    73 	 */
       
    74 	virtual void NotifyOnConfigChangeCancel()=0;
       
    75 	};
       
    76 
       
    77 #endif /*WSDISPLAYCONTROL_H_*/