1 /*

     2 * Copyright (c) 2005-2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Observer for changes in Publish & Subscribe keys

    15 *

    16 */

    17 

    18 

    19 #include "psobserver.h"

    20 #include "mpscallback.h"

    21 

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

    23 

    24 using namespace AiXmlUiController;

    25 

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

    27     CActive( CActive::EPriorityStandard ),

    28 	iCallback( aCallback ),	

    29 	iCategory( aCategory ), 

    30 	iKey( aKey )

    31     {

    32     CActiveScheduler::Add( this );

    33     }

    34 

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

    36     {

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

    38     CleanupStack::PushL( self );

    39     self->ConstructL();    

    40     CleanupStack::Pop( self );

    41     return self;

    42     }

    43     

    44 CPSObserver::~CPSObserver()

    45     {

    46     Cancel();

    47     }

    48 

    49 void CPSObserver::ConstructL()

    50     {

    51     // subscribe for changes

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

    53     iProperty.Subscribe( iStatus );

    54     SetActive();

    55     }

    56 

    57 void CPSObserver::RunL()

    58 	{

    59     iProperty.Subscribe( iStatus );

    60     SetActive();

    61 

    62     TInt value;

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

    64         {

    65 		iCallback.ValueUpdatedL( iKey, value );

    66         }

    67 	}

    68 

    69 TInt CPSObserver::RunError()

    70 	{

    71 	Cancel();

    72 	return KErrNone;		

    73 	}

    74 

    75 void CPSObserver::DoCancel()

    76 	{

    77     iProperty.Close();

    78 	}

    79 

    80 TInt CPSObserver::GetValue( TInt &aValue ) const

    81     {

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

    83     }

    84 

    85 

    86 //  End of File