1 /*

     2 * Copyright (c) 2006 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:  Publish & Subscribe property watcher

    15 *

    16 */

    17 

    18 

    19 

    20 // INCLUDE FILES

    21 #include    "CCAPSPropWatcher.h"

    22 #include    "MCAPSPropChangeObserver.h"

    23 

    24 

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

    26 

    27 // -----------------------------------------------------------------------------

    28 // CCAPSPropWatcher::CCAPSPropWatcher

    29 // C++ default constructor can NOT contain any code, that

    30 // might leave.

    31 // -----------------------------------------------------------------------------

    32 //

    33 CCAPSPropWatcher::CCAPSPropWatcher( MCAPSPropChangeObserver* aObserver )

    34         : CActive( CActive::EPriorityIdle ),

    35         iObserver( aObserver )

    36     {

    37 

    38     }

    39 

    40 // -----------------------------------------------------------------------------

    41 // CCAPSPropWatcher::ConstructL

    42 // Symbian 2nd phase constructor can leave.

    43 // -----------------------------------------------------------------------------

    44 //

    45 void CCAPSPropWatcher::ConstructL( TUid aCategory, TUint aKey )

    46     {

    47     User::LeaveIfError( iProperty.Attach( aCategory, aKey ) );

    48     CActiveScheduler::Add( this );

    49     RunL();

    50     }

    51 

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

    53 // CCAPSPropWatcher::NewL

    54 // Two-phased constructor.

    55 // -----------------------------------------------------------------------------

    56 //

    57 CCAPSPropWatcher* CCAPSPropWatcher::NewL( MCAPSPropChangeObserver* aObserver, TUid aCategory, TUint aKey )

    58     {

    59     CCAPSPropWatcher* self = new( ELeave ) CCAPSPropWatcher( aObserver );

    60 

    61     CleanupStack::PushL( self );

    62     self->ConstructL( aCategory, aKey );

    63     CleanupStack::Pop();

    64 

    65     return self;

    66     }

    67 

    68 

    69 // Destructor

    70 CCAPSPropWatcher::~CCAPSPropWatcher()

    71     {

    72     Cancel();

    73     iProperty.Close();

    74     }

    75 

    76 

    77 // -----------------------------------------------------------------------------

    78 // CCAPSPropWatcher::RunL

    79 // (other items were commented in a header).

    80 // -----------------------------------------------------------------------------

    81 //

    82 void CCAPSPropWatcher::RunL()

    83     {

    84     iProperty.Subscribe( iStatus );

    85     SetActive();

    86     if ( iObserver )

    87         {

    88         iObserver->HandlePropertyChanged();

    89         }

    90     }

    91 

    92 // -----------------------------------------------------------------------------

    93 // CCAPSPropWatcher::DoCancel

    94 // (other items were commented in a header).

    95 // -----------------------------------------------------------------------------

    96 //

    97 void CCAPSPropWatcher::DoCancel()

    98     {

    99     iProperty.Cancel();

   100     }

   101 

   102 //  End of File