1 /*

     2 * Copyright (c) 2004 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 change observer implementation

    15 *

    16 */

    17 

    18 

    19 

    20 // INCLUDE FILES

    21 #include "CIMPSPropertyObserver.h"

    22 #include "MIMPSPropertyNotificationObserver.h"

    23 

    24 #include <bautils.h>

    25 #include <barsc.h>

    26 #include <e32property.h>

    27 

    28 // ============================ MEMBER FUNCTIONS ===============================

    29 

    30 // -----------------------------------------------------------------------------

    31 // CIMPSPropertyObserver::CMGXPropertyObserver

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

    33 // might leave.

    34 // -----------------------------------------------------------------------------

    35 //

    36 CIMPSPropertyObserver::CIMPSPropertyObserver( MIMPSPropertyNotificationObserver& aObserver )

    37         : CActive( CActive::EPriorityLow ),

    38         iObserver( aObserver )

    39     {

    40     }

    41 

    42 // -----------------------------------------------------------------------------

    43 // CIMPSPropertyObserver::ConstructL

    44 // Symbian 2nd phase constructor can leave.

    45 // -----------------------------------------------------------------------------

    46 //

    47 void CIMPSPropertyObserver::ConstructL()

    48     {

    49     CActiveScheduler::Add( this );

    50     }

    51 

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

    53 // CIMPSPropertyObserver::NewL

    54 // Two-phased constructor.

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

    56 //

    57 CIMPSPropertyObserver* CIMPSPropertyObserver::NewL( MIMPSPropertyNotificationObserver& aObserver )

    58     {

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

    60 

    61     CleanupStack::PushL( self );

    62     self->ConstructL();

    63     CleanupStack::Pop();

    64 

    65     return self;

    66     }

    67 

    68 

    69 // Destructor

    70 CIMPSPropertyObserver::~CIMPSPropertyObserver()

    71     {

    72     if ( IsActive() )

    73         {

    74         Cancel();

    75         }

    76     }

    77 

    78 

    79 // -----------------------------------------------------------------------------

    80 // CIMPSPropertyObserver::ObservePropertyChangeL

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

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

    83 //

    84 void CIMPSPropertyObserver::ObservePropertyChangeL( TUid aCategory, TUint aKey )

    85     {

    86     if ( IsActive() )

    87         {

    88         return;

    89         }

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

    91     iKey = aKey;

    92     iCategory = aCategory;

    93     iProperty.Subscribe( iStatus );

    94     SetActive();

    95     }

    96 

    97 // -----------------------------------------------------------------------------

    98 // CIMPSPropertyObserver::CancelObserve

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

   100 // -----------------------------------------------------------------------------

   101 //

   102 void CIMPSPropertyObserver::CancelObserve()

   103     {

   104     if ( IsActive() )

   105         {

   106         Cancel();

   107         }

   108     }

   109 

   110 // -----------------------------------------------------------------------------

   111 // CIMPSPropertyObserver::RunL

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

   113 // -----------------------------------------------------------------------------

   114 //

   115 void CIMPSPropertyObserver::RunL()

   116     {

   117     iProperty.Subscribe( iStatus );

   118     SetActive();

   119     iObserver.HandlePropertyNotificationEventL( iCategory, iKey );

   120     }

   121 

   122 // -----------------------------------------------------------------------------

   123 // CIMPSPropertyObserver::DoCancel

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

   125 // -----------------------------------------------------------------------------

   126 //

   127 void CIMPSPropertyObserver::DoCancel()

   128     {

   129     iProperty.Cancel();

   130     }

   131 

   132 // -----------------------------------------------------------------------------

   133 // CIMPSPropertyObserver::Category

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

   135 // -----------------------------------------------------------------------------

   136 //

   137 TUid CIMPSPropertyObserver::Category()

   138     {

   139     return iCategory;

   140     }

   141 

   142 // -----------------------------------------------------------------------------

   143 // CIMPSPropertyObserver::Key

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

   145 // -----------------------------------------------------------------------------

   146 //

   147 TUint CIMPSPropertyObserver::Key()

   148     {

   149     return iKey;

   150     }

   151 

   152 //  End of File