/*

* 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:  Callback wrapper for Publish and Subscribe*

*/

// INCLUDE FILES

#include <e32svr.h>

#include <f32file.h>

#include "CamPropertyWatcher.h"

#include "CamPropertyObserver.h"

#include "CamUtility.h"

// ========================= MEMBER FUNCTIONS ================================

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

// CCamPropertyWatcher::NewL

// Two phase construction

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

//

CCamPropertyWatcher* CCamPropertyWatcher::NewL( MPropertyObserver& aPropertyObserver, 

                                                const TUid& aCategory, 

                                                const TUint aKey )

    {

    CCamPropertyWatcher* self = new(ELeave) CCamPropertyWatcher( aPropertyObserver, 

                                                                 aCategory, 

                                                                 aKey );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CCamPropertyWatcher::Destructor

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

//

CCamPropertyWatcher::~CCamPropertyWatcher()

  {

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

  Cancel();

  iProperty.Close();

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

  }

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

// CCamPropertyWatcher::Subscribe

// Request notification of change events

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

//

void CCamPropertyWatcher::Subscribe()

    {

    PRINT( _L( "Camera => CCamPropertyWatcher::Subscribe()" ) )

    if(!IsActive())

        {

        iProperty.Subscribe( iStatus );

        SetActive();

        }

    PRINT( _L( "Camera <= CCamPropertyWatcher::Subscribe()" ) )

    }

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

// CCamPropertyWatcher::Get

// Return the current value

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

//

TInt CCamPropertyWatcher::Get( TInt& aValue )

	{

	return iProperty.Get( aValue );

	}

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

// CCamPropertyWatcher::CCamPropertyWatcher

// Constructor

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

//

CCamPropertyWatcher::CCamPropertyWatcher( MPropertyObserver& aPropertyObserver, 

                                          const TUid& aCategory, 

                                          const TUint aKey ) :

    CActive( EPriorityStandard ),

    iPropertyObserver( aPropertyObserver ),

    iCategory( aCategory),

    iKey( aKey )

    {

    }

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

// CCamPropertyWatcher::ConstructL

// Second phase construction

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

//

void CCamPropertyWatcher::ConstructL()

    {

    CActiveScheduler::Add( this );

	User::LeaveIfError( iProperty.Attach( iCategory, iKey ) );

    }

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

// CCamPropertyWatcher::RunL

// Handle notification of value change

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

//

void CCamPropertyWatcher::RunL()

    {

    PRINT( _L( "Camera => CCamPropertyWatcher::RunL()" ) )

    const TInt error ( iStatus.Int() );

    PRINT1( _L( "Camera CCamPropertyWatcher::RunL() status = %d" ), error )

    Subscribe();

    if ( error == KErrNone )

        {

        PRINT( _L( "Camera CCamPropertyWatcher::RunL() calling HandlePropertyChangedL" ) )

		iPropertyObserver.HandlePropertyChangedL( iCategory, iKey );

		}

    }

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

// CCamPropertyWatcher::DoCancel

// Handle cancellation

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

//

void CCamPropertyWatcher::DoCancel()

    {

    iProperty.Cancel();

    }

//  End of File