author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 22 Feb 2010 17:57:49 +0200 | |
branch | RCL_3 |
changeset 3 | d8a3531bc6b8 |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Screen buffer class |
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* |
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*/ |
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#ifndef C_ALFSCREENBUFFER_H |
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#define C_ALFSCREENBUFFER_H |
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#include <e32base.h> |
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class CAlfEnv; |
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/** |
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* @deprecated |
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* Observer class for screen buffer. |
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*/ |
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class MAlfScreenBufferObserver |
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{ |
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/** |
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* Screen buffer Events. |
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*/ |
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public: |
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enum TAlfScreenBufferEvent |
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{ |
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ENone, |
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ECreated, // Buffer created |
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EDeleted, // Buffer deleted |
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ERestored, // Not yet implemented |
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EReleased, // Not yet implemented |
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EBufferDrawComplete // Buffer has been drawn to window |
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}; |
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/** |
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* Alf calls this when all the content have been draw to the back buffer. |
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* If EFalse is returned, the buffer is locked until the observer calls RequestNextBuffer(). |
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* If ETrue is returned, the RequestNextBuffer() is called automatically, immediately after this method returns. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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* @param aDisplayRect Screen buffer rect. |
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* @param aDirtyRect Dirty rect for the buffer. |
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* @return Return True, if buffer can be freed automatically after this call. |
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*/ |
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virtual TBool BufferComplete(TUid aBufferUid, TRect& aDisplayRect, TRect& aDirtyRect) = 0; |
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|
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/** |
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* Alf calls this when e.g. the back buffer is created or deleted. |
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* |
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* @param aId The unique id of the buffer. |
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* @param aEvent @see MAlfScreenBufferObserver::TAlfScreenBufferEvent |
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*/ |
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virtual void HandleScreenBufferEvent(TUid aBufferUid, TInt aEvent) = 0; |
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}; |
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/** |
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* This interface is to be used when drawing the buffer to the window etc. |
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*/ |
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class MAlfBufferDrawer |
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{ |
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public: |
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/** |
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* Clean all resources (usually delete this). |
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*/ |
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virtual void ReleaseDrawer() = 0; |
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}; |
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/** |
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* @deprecated |
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* This interface is to be used when modifying the buffer (sent back to server). |
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* Could be attached to special content visual. |
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*/ |
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class MAlfBufferGc |
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{ |
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public: |
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/** |
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* Clean all resources (usually delete this). |
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*/ |
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virtual void ReleaseGc() = 0; |
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}; |
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/** |
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* @deprecated |
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* The class for managing screen buffers. |
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* |
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* Usage: |
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* @code |
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* |
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* //Create screen buffer and observer |
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* CAlfScreenBuffer* screenBuffer = CAlfScreenBuffer::NewL( *iEnv ); |
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* CallbackObserver* observer = new (ELeave) CallbackObserver(); |
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* |
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* // Add observer |
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* screenBuffer->AddObserverL( testScreenBufferUid, observer ); |
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* MAlfBufferDrawer* drawer = screenBuffer->GetDrawingInterface( SYMBIAN_BUFFER_DRAWER_UID, |
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* testScreenBufferUid ); |
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* |
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* //Request for next sceenbuffer |
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* screenBuffer->RequestNextBuffer( testScreenBufferUid ); |
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* |
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* drawer->ReleaseDrawer(); |
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* drawer = NULL; |
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* |
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* //Remove observer |
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* screenBuffer->RemoveObserver( testScreenBufferUid ); |
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* |
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* //Clean up |
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* delete screenBuffer; |
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* delete observer; |
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* |
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* @endcode |
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*/ |
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NONSHARABLE_CLASS(CAlfScreenBuffer): public CBase |
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{ |
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public: |
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enum TAlfScreenBufferFlags |
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{ |
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EFlagNone = 0, |
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EFlagDisableDrawToWindow = 1 // Do not automatically draw buffer content to the window |
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}; |
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|
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/** |
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* Constructor. |
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* |
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* @param aEnv Alf environment. |
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*/ |
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IMPORT_C static CAlfScreenBuffer* NewL(CAlfEnv& aEnv); |
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|
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/** |
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* Constructor. |
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* |
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* Creates own Alf environment |
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*/ |
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IMPORT_C static CAlfScreenBuffer* NewL(); |
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|
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/** |
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* Destructor. |
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* |
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* If Alf environment is owned, it is deleted. |
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*/ |
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IMPORT_C virtual ~CAlfScreenBuffer(); |
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|
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/** |
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* Returns an instance of an interface for drawing the buffer e.g. to a window. |
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* |
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* @param aInterfaceUid Unique id of the interface. |
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* @param aBufferUid Unique id of the buffer. |
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*/ |
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IMPORT_C MAlfBufferDrawer* GetDrawingInterface(TUid aInterfaceUid, TUid aBufferUid); |
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|
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/** |
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* Returns an instance of an interface for drawing to the buffer. |
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* |
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* @param aInterfaceUid Unique id of the interface. |
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* @param aBufferUid Unique id of the buffer. |
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*/ |
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IMPORT_C MAlfBufferGc* GetGraphicsContext(TUid aInterfaceUid, TUid aBufferUid); |
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|
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/** |
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* Request next buffer from the server. Unlocks buffer for drawing. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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*/ |
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IMPORT_C void RequestNextBuffer(TUid aBufferUid); |
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|
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/** |
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* Request the server to draw the screen buffer to the window. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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*/ |
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IMPORT_C void RequestBufferDraw(TUid aBufferUid); |
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|
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/** |
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* Add an observer for a buffer. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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* @param aObserver Pointer to the observer. |
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* @param aPriority Not yet implemented. |
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*/ |
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IMPORT_C void AddObserverL(TUid aBufferUid, MAlfScreenBufferObserver* aObserver, TInt aPriority = 0 ); |
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|
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/** |
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* Add an observer for a buffer. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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* @param aFlags Screen buffer flags. |
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* @param aObserver Pointer to the observer. |
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* @param aPriority Not yet implemented. |
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*/ |
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IMPORT_C void AddObserverL(TUid aBufferUid, TUint aFlags, MAlfScreenBufferObserver* aObserver, TInt aPriority = 0 ); |
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|
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/** |
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* Remove observer from the buffer. |
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* |
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* @param aBufferUid Unique id of the buffer. |
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*/ |
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IMPORT_C void RemoveObserver(TUid aBufferId); |
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private: |
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CAlfScreenBuffer(); |
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CAlfScreenBuffer(CAlfEnv& aEnv); |
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void ConstructL(CAlfEnv* aEnv, TBool aIsAlfEnvOwned); |
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void ConstructL(); |
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private: |
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class CPrivateData; |
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CPrivateData* iData; |
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}; |
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#endif // C_ALFSCREENBUFFER_H |