sl@0: // Copyright (c) 2008-2009 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: // Interface for Render Stage Display Policy
sl@0: // 
sl@0: //
sl@0: 
sl@0: #ifndef WSDISPLAYPOLICY_H_
sl@0: #define WSDISPLAYPOLICY_H_
sl@0: 
sl@0: /**
sl@0: @file
sl@0: @publishedpartner 
sl@0: @released
sl@0: */
sl@0: 
sl@0: #include <graphics/displayconfiguration.h>
sl@0: #include <graphics/wsgraphicdrawerinterface.h>
sl@0: 
sl@0: class MWsDisplayPolicy: public MWsObjectProvider
sl@0: 	{
sl@0: public:
sl@0: 	enum	
sl@0: 		{
sl@0: 		KUidWsDisplayPolicy	 =  0x102869FA, 	 
sl@0: 		ETypeId=				KUidWsDisplayPolicy,
sl@0: 		EWsObjectInterfaceId=	KUidWsDisplayPolicy
sl@0: 		};
sl@0: 	
sl@0: 	enum TDisplayStatus
sl@0: 		{
sl@0: 		EDetach = 0,
sl@0: 		EAttach,
sl@0: 		EConnecting,
sl@0: 		};
sl@0: public:
sl@0: 	/**
sl@0: 	 * Notification from the Window Server that the application size mode list has been updated.
sl@0: 	 */
sl@0: 	virtual void NewAppModesAvailable()=0;
sl@0: 	/**
sl@0: 	 * Determine the display configuration and application rendering extent to use for a given screen size mode.
sl@0: 	 * 
sl@0: 	 * The Window Server uses this function when a request to change to a new screen size mode or new display 
sl@0: 	 * configuration is made by a client. The display configuration passed in may be partially filled, and the 
sl@0: 	 * combination of the defined entries in it and the requested screen size mode values shall be used to define 
sl@0: 	 * the rest of the configuration and new application extent to be used.
sl@0: 	 * 
sl@0: 	 * Only undefined entries in the configuration may be set by this function. Entries already defined must retain 
sl@0: 	 * the same values. If the combination of defined entries and size mode values is not acceptable to the implementer, 
sl@0: 	 * the function shall return KErrArgument.
sl@0: 	 * 
sl@0: 	 * If the function returns KErrNone, the Window Server shall set the returned display configuration, notify render 
sl@0: 	 * stages of the new application extent and change to use the screen size mode. If either this function returns 
sl@0: 	 * EFalse or the call to set the display configuration fails for any reason (such as KErrNoMemory, for example), 
sl@0: 	 * then no further changes are made.
sl@0: 	 * 
sl@0: 	 * @see MWsScreenConfigList
sl@0: 	 * @see MWsDisplayMapping
sl@0: 	 * 
sl@0: 	 * @param aScreenSizeMode The requested screen size mode. If static, the size in pixels, size in twips, and 
sl@0: 	 * the rotation must be respected. If dynamic, only the rotation must be respected.
sl@0: 	 * @param aConfig The requested display configuration on input, the required configuration on return. Only 
sl@0: 	 * undefined entries may be set.
sl@0: 	 * @param aExtent The screen size mode offset and size on input, the required application offset and size on return. 
sl@0: 	 * If the screen driver buffer is used as the UI surface, this must be left unchanged.
sl@0: 	 * @return KErrNone if no error, otherwise a system wide error code
sl@0: 	 */
sl@0: 	virtual TInt GetSizeModeConfiguration(TInt aScreenSizeMode, TDisplayConfiguration& aConfig, TRect& aSizeModePosition) const =0;
sl@0: 	virtual TInt SuitableAppMode(TDisplayStatus aSituation)=0;
sl@0: 	/**
sl@0: 	 * Sets the application mode resumed to after a display is connected again after a disconnect.
sl@0: 	 * 
sl@0: 	 * @param aMode The application mode.
sl@0: 	 */
sl@0: 	virtual void SetLastAppMode(TInt aMode)=0;
sl@0: 	};
sl@0: 
sl@0: #endif /*WSDISPLAYPOLICY_H_*/