/*

* Copyright (c) 2005-2008 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:  Observer for changes in Publish & Subscribe keys

*

*/

#include "psobserver.h"

#include "mpscallback.h"

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

using namespace AiXmlUiController;

CPSObserver::CPSObserver( MPSCallback& aCallback, TUid aCategory, TInt aKey ) :

    CActive( CActive::EPriorityStandard ),

	iCallback( aCallback ),	

	iCategory( aCategory ), 

	iKey( aKey )

    {

    CActiveScheduler::Add( this );

    }

CPSObserver* CPSObserver::NewL( MPSCallback& aCallback, TUid aCategory, TInt aKey )

    {

    CPSObserver* self = new( ELeave ) CPSObserver( aCallback, aCategory, aKey );

    CleanupStack::PushL( self );

    self->ConstructL();    

    CleanupStack::Pop( self );

    return self;

    }

CPSObserver::~CPSObserver()

    {

    Cancel();

    }

void CPSObserver::ConstructL()

    {

    // subscribe for changes

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

    iProperty.Subscribe( iStatus );

    SetActive();

    }

void CPSObserver::RunL()

	{

    iProperty.Subscribe( iStatus );

    SetActive();

    TInt value;

    if( iProperty.Get( iCategory, iKey, value ) != KErrNotFound )

        {

		iCallback.ValueUpdatedL( iKey, value );

        }

	}

TInt CPSObserver::RunError()

	{

	Cancel();

	return KErrNone;		

	}

void CPSObserver::DoCancel()

	{

    iProperty.Close();

	}

TInt CPSObserver::GetValue( TInt &aValue ) const

    {

    return iProperty.Get( iCategory, iKey, aValue );

    }

//  End of File