1 /*

     2 * Copyright (c) 2010 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:  Listens to given P&S key and notifies

    15 *                observer whenever the value changes.

    16 */

    17 

    18 

    19 #include "sysapganpropertylistener.h" 

    20 

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

    22 

    23 // ---------------------------------------------------------------------------

    24 // C++ constructor

    25 // ---------------------------------------------------------------------------

    26 //

    27 CSysApGanPropertyListener::CSysApGanPropertyListener( 

    28     RProperty& aProperty,

    29     MSysApGanPropertyObserver& aObserver ) :

    30     CActive( CActive::EPriorityStandard ),

    31     iObserver( aObserver ),

    32     iProperty( aProperty )

    33     {

    34     CActiveScheduler::Add( this );

    35     }

    36 

    37 // ---------------------------------------------------------------------------

    38 // Static constructor.

    39 // ---------------------------------------------------------------------------

    40 //

    41 CSysApGanPropertyListener* CSysApGanPropertyListener::NewL(

    42     RProperty& aProperty,

    43     MSysApGanPropertyObserver& aObserver )

    44     {

    45     CSysApGanPropertyListener* self = 

    46         new ( ELeave ) CSysApGanPropertyListener( aProperty, aObserver ); 

    47     return self;

    48     }

    49 

    50 // ---------------------------------------------------------------------------

    51 // Destructor.

    52 // ---------------------------------------------------------------------------

    53 //

    54 CSysApGanPropertyListener::~CSysApGanPropertyListener()

    55     {

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

    57     }

    58 

    59 // ---------------------------------------------------------------------------

    60 // Subscribe for property value changes.

    61 // ---------------------------------------------------------------------------

    62 //

    63 void CSysApGanPropertyListener::Subscribe()

    64     {

    65     // Cancel any outstanding request

    66     Cancel();

    67 

    68     iProperty.Subscribe( iStatus );

    69     SetActive();

    70     }

    71 

    72 // ---------------------------------------------------------------------------

    73 // Property value changed.

    74 // ---------------------------------------------------------------------------

    75 //

    76 void CSysApGanPropertyListener::RunL()

    77     {

    78     // Notify the observer.

    79     iObserver.PropertyEvent( *this, iStatus.Int() );

    80     }

    81 

    82 // ---------------------------------------------------------------------------

    83 // Subscription cancelled.

    84 // ---------------------------------------------------------------------------

    85 //

    86 void CSysApGanPropertyListener::DoCancel()

    87     {

    88     iProperty.Cancel();

    89     }

    90 

    91 // ---------------------------------------------------------------------------

    92 // Error in RunL.

    93 // ---------------------------------------------------------------------------

    94 //

    95 TInt CSysApGanPropertyListener::RunError( TInt /*aError*/ )

    96     {

    97     // ignore error

    98     return KErrNone;

    99     }