/*

* Copyright (c) 2002 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:    LandmarksUi Content File -

*

*/

// INCLUDE FILES

#include "CLmkEventListenerSingleton.h"

#include "CLmkDbEventListener.h"

#include "LmkConsts.h"

#include <lmkerrors.h>

#if defined(_DEBUG)

// CONSTANTS

/// Unnamed namespace for local definitions

namespace {

_LIT( KPanicMsg, "CLmkEventListenerSingleton" );

void Panic( TPanicCode aReason )

    {

    User::Panic( KPanicMsg, aReason );

    }

}  // namespace

#endif

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

// CLmkEventListenerSingleton::CLmkEventListenerSingleton

// C++ constructor can NOT contain any code, that

// might leave.

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

//

CLmkEventListenerSingleton::CLmkEventListenerSingleton()

    : CCoeStatic( KLmkEventListenerSingletonUid )

    {

    }

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

// CLmkEventListenerSingleton::ConstructL

// Symbian 2nd phase constructor can leave.

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

//

void CLmkEventListenerSingleton::ConstructL()

    {

    __ASSERT_DEBUG( !iEventListener, Panic( KLmkPanicIllegalConstruction ) );

    iEventListener = CLmkDbEventListener::NewL();

    }

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

// CLmkEventListenerSingleton::~CLmkEventListenerSingleton

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

//

CLmkEventListenerSingleton::~CLmkEventListenerSingleton()

    {

    delete iEventListener;

    }

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

// CLmkEventListenerSingleton::AddObserverL

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

//

void CLmkEventListenerSingleton::AddObserverL(

    MLmkDbObserver& aObserver,

    CPosLandmarkDatabase& aDb )

    {

	CLmkEventListenerSingleton* singleton =

        static_cast<CLmkEventListenerSingleton*>(

            CCoeEnv::Static( KLmkEventListenerSingletonUid ) );

	if ( !singleton )

		{

		singleton = new ( ELeave ) CLmkEventListenerSingleton();

        // CCoeEnv takes the ownership, but we must ensure that

        // construction is complete, otherwise singleton can't be used.

        CleanupStack::PushL( singleton );

        singleton->ConstructL();

        CleanupStack::Pop( singleton );

		}

    singleton->iEventListener->AddObserverL( aObserver, aDb );

    }

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

// CLmkEventListenerSingleton::RemoveObserver

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

//

void CLmkEventListenerSingleton::RemoveObserver(

    MLmkDbObserver& aObserver )

    {

	CLmkEventListenerSingleton* singleton =

        static_cast<CLmkEventListenerSingleton*>(

            CCoeEnv::Static( KLmkEventListenerSingletonUid ) );

	if ( singleton )

        {

        singleton->iEventListener->RemoveObserver( aObserver );

        }

    // If singleton does not exist observer removal is unnecessary

    }

//  End of File