/*

* Copyright (c) 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:  Subscribes properties from P&S

*

*/

#include "xnpropertysubscriber.h"

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//

CXnPropertySubscriber::CXnPropertySubscriber(

    MXnPropertyChangeObserver& aObserver,

    const TUint32 aKey )

    : CActive( EPriorityStandard ),

    iPropertyChangeObserver( aObserver ),

    iKey( aKey )

    {

    }

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

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

//

CXnPropertySubscriber* CXnPropertySubscriber::NewLC(

    const TUid aUid,

    const TUint32 aKey,

    MXnPropertyChangeObserver& aObserver )

    {

    CXnPropertySubscriber* self =

        new ( ELeave ) CXnPropertySubscriber( aObserver, aKey );

    CleanupStack::PushL( self );

    self->ConstructL( aUid, aKey );

    return self;

    }

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//

CXnPropertySubscriber* CXnPropertySubscriber::NewL(

    const TUid aUid,

    const TUint32 aKey,

    MXnPropertyChangeObserver& aObserver )

    {

    CXnPropertySubscriber* self = CXnPropertySubscriber::NewLC(

        aUid, aKey, aObserver );

    CleanupStack::Pop(); // self;

    return self;

    }

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//

void CXnPropertySubscriber::ConstructL(

    const TUid aUid,

    const TUint32 aKey )

    {

    User::LeaveIfError( iProperty.Attach( aUid, aKey ) );

    CActiveScheduler::Add( this ); // Add to scheduler

    // initial subscription and process current property value

    RunL();

    }

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//

CXnPropertySubscriber::~CXnPropertySubscriber()

    {

    Cancel(); // Cancel any request, if outstanding

    iProperty.Close();

    }

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//

void CXnPropertySubscriber::DoCancel()

    {

    iProperty.Cancel();

    }

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//

void CXnPropertySubscriber::RunL()

    {

    // resubscribe before processing new value to prevent missing updates

    iProperty.Subscribe( iStatus );

    SetActive();

    TInt intValue;

    if ( iProperty.Get( intValue ) != KErrNotFound )

        {

        iPropertyChangeObserver.PropertyChangedL( iKey, intValue );

        }

    }

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

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

//

TInt CXnPropertySubscriber::RunError(TInt /*aError*/)

    {   

    return KErrNone;

    }

// End of file