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".
8 // Initial Contributors:
9 // Nokia Corporation - initial contribution.
14 // Interface for Render Stage Display Policy
18 #ifndef WSDISPLAYPOLICY_H_
19 #define WSDISPLAYPOLICY_H_
27 #include <graphics/displayconfiguration.h>
28 #include <graphics/wsgraphicdrawerinterface.h>
30 class MWsDisplayPolicy: public MWsObjectProvider
35 KUidWsDisplayPolicy = 0x102869FA,
36 ETypeId= KUidWsDisplayPolicy,
37 EWsObjectInterfaceId= KUidWsDisplayPolicy
48 * Notification from the Window Server that the application size mode list has been updated.
50 virtual void NewAppModesAvailable()=0;
52 * Determine the display configuration and application rendering extent to use for a given screen size mode.
54 * The Window Server uses this function when a request to change to a new screen size mode or new display
55 * configuration is made by a client. The display configuration passed in may be partially filled, and the
56 * combination of the defined entries in it and the requested screen size mode values shall be used to define
57 * the rest of the configuration and new application extent to be used.
59 * Only undefined entries in the configuration may be set by this function. Entries already defined must retain
60 * the same values. If the combination of defined entries and size mode values is not acceptable to the implementer,
61 * the function shall return KErrArgument.
63 * If the function returns KErrNone, the Window Server shall set the returned display configuration, notify render
64 * stages of the new application extent and change to use the screen size mode. If either this function returns
65 * EFalse or the call to set the display configuration fails for any reason (such as KErrNoMemory, for example),
66 * then no further changes are made.
68 * @see MWsScreenConfigList
69 * @see MWsDisplayMapping
71 * @param aScreenSizeMode The requested screen size mode. If static, the size in pixels, size in twips, and
72 * the rotation must be respected. If dynamic, only the rotation must be respected.
73 * @param aConfig The requested display configuration on input, the required configuration on return. Only
74 * undefined entries may be set.
75 * @param aExtent The screen size mode offset and size on input, the required application offset and size on return.
76 * If the screen driver buffer is used as the UI surface, this must be left unchanged.
77 * @return KErrNone if no error, otherwise a system wide error code
79 virtual TInt GetSizeModeConfiguration(TInt aScreenSizeMode, TDisplayConfiguration& aConfig, TRect& aSizeModePosition) const =0;
80 virtual TInt SuitableAppMode(TDisplayStatus aSituation)=0;
82 * Sets the application mode resumed to after a display is connected again after a disconnect.
84 * @param aMode The application mode.
86 virtual void SetLastAppMode(TInt aMode)=0;
89 #endif /*WSDISPLAYPOLICY_H_*/