1 /*

     2 * Copyright (c) 2007 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:  Callback wrapper for Publish and Subscribe*

    15 */

    16 

    17 

    18 // INCLUDE FILES

    19 

    20 #include <e32svr.h>

    21 #include <f32file.h>

    22 #include "CamPropertyWatcher.h"

    23 #include "CamPropertyObserver.h"

    24 #include "CamUtility.h"

    25 

    26 // ========================= MEMBER FUNCTIONS ================================

    27 

    28 // -----------------------------------------------------------------------------

    29 // CCamPropertyWatcher::NewL

    30 // Two phase construction

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

    32 //

    33 CCamPropertyWatcher* CCamPropertyWatcher::NewL( MPropertyObserver& aPropertyObserver, 

    34                                                 const TUid& aCategory, 

    35                                                 const TUint aKey )

    36     {

    37     CCamPropertyWatcher* self = new(ELeave) CCamPropertyWatcher( aPropertyObserver, 

    38                                                                  aCategory, 

    39                                                                  aKey );

    40     CleanupStack::PushL( self );

    41     self->ConstructL();

    42     CleanupStack::Pop( self );

    43     return self;

    44     }

    45 

    46 // -----------------------------------------------------------------------------

    47 // CCamPropertyWatcher::Destructor

    48 // -----------------------------------------------------------------------------

    49 //

    50 CCamPropertyWatcher::~CCamPropertyWatcher()

    51   {

    52   PRINT( _L("Camera => ~CCamPropertyWatcher") );

    53   Cancel();

    54   iProperty.Close();

    55   PRINT( _L("Camera <= ~CCamPropertyWatcher") );

    56   }

    57 

    58 // -----------------------------------------------------------------------------

    59 // CCamPropertyWatcher::Subscribe

    60 // Request notification of change events

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

    62 //

    63 void CCamPropertyWatcher::Subscribe()

    64     {

    65     PRINT( _L( "Camera => CCamPropertyWatcher::Subscribe()" ) )

    66     if(!IsActive())

    67         {

    68         iProperty.Subscribe( iStatus );

    69         SetActive();

    70         }

    71     PRINT( _L( "Camera <= CCamPropertyWatcher::Subscribe()" ) )

    72     }

    73 

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

    75 // CCamPropertyWatcher::Get

    76 // Return the current value

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

    78 //

    79 TInt CCamPropertyWatcher::Get( TInt& aValue )

    80 	{

    81 	return iProperty.Get( aValue );

    82 	}

    83 

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

    85 // CCamPropertyWatcher::CCamPropertyWatcher

    86 // Constructor

    87 // -----------------------------------------------------------------------------

    88 //

    89 CCamPropertyWatcher::CCamPropertyWatcher( MPropertyObserver& aPropertyObserver, 

    90                                           const TUid& aCategory, 

    91                                           const TUint aKey ) :

    92     CActive( EPriorityStandard ),

    93     iPropertyObserver( aPropertyObserver ),

    94     iCategory( aCategory),

    95     iKey( aKey )

    96     {

    97     }

    98 

    99 // -----------------------------------------------------------------------------

   100 // CCamPropertyWatcher::ConstructL

   101 // Second phase construction

   102 // -----------------------------------------------------------------------------

   103 //

   104 void CCamPropertyWatcher::ConstructL()

   105     {

   106     CActiveScheduler::Add( this );

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

   108     }

   109 

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

   111 // CCamPropertyWatcher::RunL

   112 // Handle notification of value change

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

   114 //

   115 void CCamPropertyWatcher::RunL()

   116     {

   117     PRINT( _L( "Camera => CCamPropertyWatcher::RunL()" ) )

   118     const TInt error ( iStatus.Int() );

   119     PRINT1( _L( "Camera CCamPropertyWatcher::RunL() status = %d" ), error )

   120     Subscribe();

   121     if ( error == KErrNone )

   122         {

   123         PRINT( _L( "Camera CCamPropertyWatcher::RunL() calling HandlePropertyChangedL" ) )

   124 		iPropertyObserver.HandlePropertyChangedL( iCategory, iKey );

   125 		}

   126     }

   127 

   128 // -----------------------------------------------------------------------------

   129 // CCamPropertyWatcher::DoCancel

   130 // Handle cancellation

   131 // -----------------------------------------------------------------------------

   132 //

   133 void CCamPropertyWatcher::DoCancel()

   134     {

   135     iProperty.Cancel();

   136     }

   137 

   138 //  End of File