musichomescreen_multiview/mcpmusicplayer/inc/pnsmonitor.h
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     1 /*
       
     2 * Copyright (c) 2008-2008 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:  Monitors for publish and subscribe property.
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #ifndef C_PNSMONITOR_H
       
    20 #define C_PNSMONITOR_H
       
    21 
       
    22 #include <e32base.h>
       
    23 
       
    24 class MPNSMonitorObserver;
       
    25 
       
    26 /**
       
    27  *  publish and subscribe monitor class
       
    28  *
       
    29  *  @since S60 5.0
       
    30  */
       
    31 NONSHARABLE_CLASS( CPNSMonitor ) : public CActive
       
    32     {
       
    33 
       
    34 public:
       
    35 
       
    36     /**
       
    37     * Two-phased constructor
       
    38     */
       
    39     static CPNSMonitor* NewL( MPNSMonitorObserver& aObserver );
       
    40 
       
    41     /**
       
    42     * Virtual destructor
       
    43     */
       
    44     virtual ~CPNSMonitor();
       
    45 
       
    46     /**
       
    47     * Start monitoring a particular publish and subscribe property
       
    48     */
       
    49     void Start();
       
    50    
       
    51 protected:
       
    52         
       
    53     /**
       
    54     * From CActive
       
    55     */
       
    56     void RunL();
       
    57     
       
    58     /**
       
    59     * From CActive
       
    60     */
       
    61     void DoCancel();
       
    62 
       
    63     /**
       
    64     *  From CActive
       
    65     */
       
    66     TInt RunError( TInt aError );    
       
    67             
       
    68 private:
       
    69     
       
    70     /**
       
    71     * Private constructor
       
    72     */
       
    73     CPNSMonitor( MPNSMonitorObserver& aObserver );
       
    74 
       
    75     /**
       
    76     * 2nd phased constructor
       
    77     */
       
    78     void ConstructL();
       
    79 
       
    80 private: // data
       
    81     MPNSMonitorObserver& iObserver;
       
    82     RProperty iPropertyHandler;
       
    83     };
       
    84 
       
    85 #endif // C_PNSMONITOR_H