/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Generic handler to be used by Observables

*

*  Copyright © 2007 Nokia.  All rights reserved.

*  This material, including documentation and any related computer

*  programs, is protected by copyright controlled by Nokia.  All

*  rights are reserved.  Copying, including reproducing, storing,

*  adapting or translating, any or all of this material requires the

*  prior written consent of Nokia.  This material also contains

*  confidential information which may not be disclosed to others

*  without the prior written consent of Nokia.

*

*

*/

// INCLUDE FILES

#include "CamObservable.h"

#include "CamObserver.h"

#include "CamObserverHandler.h"

#include "camlogging.h"

// ---------------------------------------------------------

// CCamObserverHandler::CCamObserverHandler

// C++ constructor

// ---------------------------------------------------------

//

CCamObserverHandler::CCamObserverHandler()

    {

    }

// ---------------------------------------------------------

// CCamObserverHandler::~CCamObserverHandler

// C++ Destructor

// ---------------------------------------------------------

//

CCamObserverHandler::~CCamObserverHandler()

  {

  PRINT( _L("Camera => ~CCamObserverHandler") );

  iObservers.Reset();

  PRINT( _L("Camera <= ~CCamObserverHandler") );

  }

// ---------------------------------------------------------

// CCamObserverHandler::NewL

// Symbian 2-phase constructor

// ---------------------------------------------------------

//

CCamObserverHandler* CCamObserverHandler::NewL()

    {

    CCamObserverHandler* self = new( ELeave ) CCamObserverHandler();

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------

// CCamObserverHandler::ConstructL

// Second phase constructor

// ---------------------------------------------------------

//

void CCamObserverHandler::ConstructL()

    {

    }

// ---------------------------------------------------------

// CCamObserverHandler::RegisterObserverL

// Registers observer if not previously registered

// ---------------------------------------------------------

//

void CCamObserverHandler::RegisterObserverL(MCamObserver* aObserver)

    {

    if ( aObserver )

        {

        if ( KErrNotFound == iObservers.Find( aObserver ))

            {

            User::LeaveIfError(iObservers.Append(aObserver));

            }

        }

    }

// ---------------------------------------------------------

// CCamObserverHandler::DeregisterObserver

// Removes observer

// ---------------------------------------------------------

//

void CCamObserverHandler::DeregisterObserver(MCamObserver* aObserver)

    {

    if ( aObserver )

        {

        TInt index = iObservers.Find( aObserver );

        if ( KErrNotFound != index )

            {

            iObservers.Remove(index);

            }

        }

    }

// ---------------------------------------------------------

// CCamObserverHandler::BroadcastEvent

// Broadcasts an event code to all observers

// ---------------------------------------------------------

//

void CCamObserverHandler::BroadcastEvent( TCamObserverEvent aEvent )

    {

    TInt count = iObservers.Count();

    TInt i;

    for ( i = 0; i < count; i++ )

        {

        // Checked to be non-NULL when added to array.

        iObservers[i]->HandleObservedEvent( aEvent );

        }

    }

// End of File