1 /*

     2 * Copyright (c) 2002-2007 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:  

    15 *

    16 */

    17 

    18 

    19 #ifndef C_CSCPPROPERTYNOTIFIER_H

    20 #define C_CSCPPROPERTYNOTIFIER_H

    21 

    22 #include <e32base.h>

    23 #include <e32property.h>

    24 

    25 class MScpPropertyObserver;

    26 

    27 /**

    28 *  Property notifier

    29 *

    30 */

    31 class CScpPropertyNotifier : public CActive

    32     {

    33 public:

    34 

    35     /**

    36      * Two-phased constructor.

    37      */

    38     static CScpPropertyNotifier* NewL( TUid aUid, 

    39                                        TInt aType,

    40                                        MScpPropertyObserver& aObserver  );

    41     

    42     /**

    43      * Destructor.

    44      */

    45     virtual ~CScpPropertyNotifier();

    46 

    47     /**

    48      * Returns the property's value

    49      * @param aValue Value

    50      * @return Symbian error codes

    51      */

    52     TInt GetValue( TInt& aValue ) const;

    53        

    54 // From CActive         

    55 private:

    56 

    57     /**

    58      * RunL

    59      */

    60     void RunL();

    61     

    62     /**

    63      * Catches errors if RunL leaves

    64      * @param aError error code

    65      * @return error code

    66      */

    67     TInt RunError( TInt aError );

    68     

    69     /**

    70      * Cancels the monitor

    71      */

    72     void DoCancel();  

    73 

    74 private:

    75 

    76     /**

    77      * C++ default constructor.

    78      */

    79     CScpPropertyNotifier( TUid aUid, 

    80                           TInt aType, 

    81                           MScpPropertyObserver& aObserver );

    82     

    83     /**

    84      * ConstructL

    85      */

    86     void ConstructL();

    87 

    88     /**

    89      * Subscribes to property's notifications

    90      */

    91     void Subscribe();

    92 

    93 private:

    94 

    95     /**

    96      * UID of the property

    97      */

    98     TUid iUid;

    99     

   100     /**

   101      * Property type

   102      */

   103     TInt iType; 

   104 

   105     /**

   106      * Property observer

   107      */

   108     MScpPropertyObserver& iObserver;

   109 

   110     /**

   111      * Property

   112      */

   113     RProperty iProperty;

   114 

   115 #ifdef _DEBUG

   116 

   117 friend class T_CScpPropertyNotifier;

   118 

   119 #endif

   120 

   121     };

   122 

   123 

   124 #endif      // C_CSCPPROPERTYNOTIFIER_H   

   125             

   126 // End of File