musichomescreen_multiview/mcpmusicplayer/inc/filemonitor.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 the file system for changes in a file.
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #ifndef C_FILEMONITOR_H
       
    20 #define C_FILEMONITOR_H
       
    21 
       
    22 #include <e32base.h>
       
    23 #include <f32file.h>//??? remove???
       
    24 
       
    25 class MFileMonitorObserver;
       
    26 
       
    27 /**
       
    28  *  File monitor class
       
    29  *
       
    30  *  @since S60 5.0
       
    31  */
       
    32 NONSHARABLE_CLASS( CFileMonitor ) : public CActive
       
    33     {
       
    34 
       
    35 public:
       
    36 
       
    37     /**
       
    38     * Two-phased constructor
       
    39     */
       
    40     static CFileMonitor* NewL( MFileMonitorObserver& aObserver);
       
    41 
       
    42     /**
       
    43     * Virtual destructor
       
    44     */
       
    45     virtual ~CFileMonitor();
       
    46 
       
    47     /**
       
    48     * Start monitoring a particular file
       
    49     * @param aFile file to monitor
       
    50     */
       
    51     void StartL( const TDesC& aFile );
       
    52    
       
    53 protected:
       
    54         
       
    55     /**
       
    56     * From CActive
       
    57     */
       
    58     void RunL();
       
    59     
       
    60     /**
       
    61     * From CActive
       
    62     */
       
    63     void DoCancel();
       
    64 
       
    65     /**
       
    66     *  From CActive
       
    67     */
       
    68     TInt RunError(TInt aError);    
       
    69             
       
    70 private:
       
    71     
       
    72     /**
       
    73     * Private constructor
       
    74     */
       
    75     CFileMonitor( MFileMonitorObserver& aObserver);
       
    76 
       
    77     /**
       
    78     * 2nd phased constructor
       
    79     */
       
    80     void ConstructL();
       
    81 
       
    82 private: // data
       
    83     MFileMonitorObserver&  iObserver;
       
    84     RFs iFs; 
       
    85     HBufC* iFilePath;
       
    86     };
       
    87 
       
    88 #endif // C_FILEMONITOR_H