/*

* 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 "mmpropertysubscriber.h"

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

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

//

CMmPropertySubscriber::CMmPropertySubscriber(MMmPropertyChangeObserver& aObserver) 

    : CActive( EPriorityStandard ),

    iPropertyChangeObserver(aObserver)

     {

     }

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

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

//

CMmPropertySubscriber* CMmPropertySubscriber::NewLC(

    const TUid aUid, 

    const TUint32 aKey,

    MMmPropertyChangeObserver& aObserver)

    {

    CMmPropertySubscriber* self = new ( ELeave ) CMmPropertySubscriber(aObserver);

    CleanupStack::PushL(self);

    self->ConstructL(aUid,aKey);

    return self;

    }

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

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

//

CMmPropertySubscriber* CMmPropertySubscriber::NewL(

    const TUid aUid, 

    const TUint32 aKey,

    MMmPropertyChangeObserver& aObserver)

    {

    CMmPropertySubscriber* self = CMmPropertySubscriber::NewLC(aUid,aKey,aObserver);

    CleanupStack::Pop(); // self;

    return self;

    }

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

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

//

void CMmPropertySubscriber::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();

    }

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

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

//

CMmPropertySubscriber::~CMmPropertySubscriber()

    {

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

    iProperty.Close();

    }

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

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

//

void CMmPropertySubscriber::DoCancel()

    {

    iProperty.Close();

    }

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

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

//

void CMmPropertySubscriber::RunL()

    {

    // resubscribe before processing new value to prevent missing updates

    iProperty.Subscribe( iStatus );

    SetActive();

    TInt intValue;

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

        {

        iPropertyChangeObserver.PropertyChangedL(intValue);

        }

    }