camerauis/cameraapp/generic/src/CamObserverHandler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:18:56 +0200
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/*
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* Copyright (c) 2007 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:  Generic handler to be used by Observables
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*
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*  Copyright © 2007 Nokia.  All rights reserved.
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*  This material, including documentation and any related computer
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*  programs, is protected by copyright controlled by Nokia.  All
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*  rights are reserved.  Copying, including reproducing, storing,
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*  adapting or translating, any or all of this material requires the
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*  prior written consent of Nokia.  This material also contains
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*  confidential information which may not be disclosed to others
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*  without the prior written consent of Nokia.
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*
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*
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*/
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// INCLUDE FILES
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#include "CamObservable.h"
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#include "CamObserver.h"
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#include "CamObserverHandler.h"
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#include "camlogging.h"
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// ---------------------------------------------------------
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// CCamObserverHandler::CCamObserverHandler
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// C++ constructor
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// ---------------------------------------------------------
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//
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CCamObserverHandler::CCamObserverHandler()
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    {
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    }
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// ---------------------------------------------------------
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// CCamObserverHandler::~CCamObserverHandler
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// C++ Destructor
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// ---------------------------------------------------------
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//
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CCamObserverHandler::~CCamObserverHandler()
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  {
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  PRINT( _L("Camera => ~CCamObserverHandler") );
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  iObservers.Reset();
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  PRINT( _L("Camera <= ~CCamObserverHandler") );
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  }
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// ---------------------------------------------------------
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// CCamObserverHandler::NewL
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// Symbian 2-phase constructor
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// ---------------------------------------------------------
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//
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CCamObserverHandler* CCamObserverHandler::NewL()
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    {
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    CCamObserverHandler* self = new( ELeave ) CCamObserverHandler();
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------
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// CCamObserverHandler::ConstructL
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// Second phase constructor
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// ---------------------------------------------------------
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//
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void CCamObserverHandler::ConstructL()
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    {
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    }
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// ---------------------------------------------------------
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// CCamObserverHandler::RegisterObserverL
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// Registers observer if not previously registered
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// ---------------------------------------------------------
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//
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void CCamObserverHandler::RegisterObserverL(MCamObserver* aObserver)
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    {
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    if ( aObserver )
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        {
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        if ( KErrNotFound == iObservers.Find( aObserver ))
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            {
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            User::LeaveIfError(iObservers.Append(aObserver));
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            }
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        }
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    }
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// ---------------------------------------------------------
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// CCamObserverHandler::DeregisterObserver
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// Removes observer
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// ---------------------------------------------------------
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//
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void CCamObserverHandler::DeregisterObserver(MCamObserver* aObserver)
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    {
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    if ( aObserver )
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        {
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        TInt index = iObservers.Find( aObserver );
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        if ( KErrNotFound != index )
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            {
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            iObservers.Remove(index);
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            }
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        }
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    }
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// ---------------------------------------------------------
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// CCamObserverHandler::BroadcastEvent
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// Broadcasts an event code to all observers
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// ---------------------------------------------------------
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//
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void CCamObserverHandler::BroadcastEvent( TCamObserverEvent aEvent )
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    {
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    TInt count = iObservers.Count();
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    TInt i;
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    for ( i = 0; i < count; i++ )
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        {
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        // Checked to be non-NULL when added to array.
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        iObservers[i]->HandleObservedEvent( aEvent );
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        }
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    }
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// End of File