1 /*

     2 * Copyright (c) 2009 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 #ifndef MCSCHILDRENSCANNER_H_

    18 #define MCSCHILDRENSCANNER_H_

    19 

    20 

    21 #include <e32base.h>

    22 #include "menuengoperation.h"

    23 #include "mcsmenuitem.h"

    24 

    25 class CMenuSrvEng;

    26 

    27 /**

    28  * Interface for updating Now Playing entry after Publish&Subscribe events.

    29  *

    30  * @since S60 v3.2

    31  */

    32 class MMcsChildrenScanner

    33     {

    34     

    35 public:

    36     virtual void HandleChildrenEvent(TInt aId, TUint oldCount, TUint newCount) = 0;

    37     };

    38 

    39 

    40 /**

    41  *  Children Scanner Active Object.

    42  *  @lib mcsmenu.lib

    43  *  @since S60 v5.0

    44  */

    45 NONSHARABLE_CLASS( CMcsChildrenScanner ) : 

    46     public CActive,

    47     public MMenuEngOperation

    48     {

    49     

    50 public:

    51 

    52     /**

    53      * Creates an instance of CMcsChildrenScanner implementation.

    54      *

    55      * @since S60 v5.0

    56      */

    57     static CMcsChildrenScanner* NewL( 

    58     	MMcsChildrenScanner& aObserver, 

    59         CMenuSrvEng& aSrvEng);

    60 

    61     /**

    62      * Destructor.

    63      */

    64     virtual ~CMcsChildrenScanner();

    65     

    66     void Scan(TInt aId);

    67     

    68 private:

    69    

    70    /**

    71     * Execute engine operation:

    72     */

    73     void RunMenuEngOperationL();

    74 

    75     /**

    76     * Error handling: ignore error.

    77     * @param aErr Error code.

    78     */

    79     void CompletedMenuEngOperation( TInt aErr );

    80     

    81     void ScanFolderL();

    82     

    83 

    84 private:

    85     /**

    86      * Constructor.

    87      *

    88      * @since S60 v5.0

    89      */

    90 	CMcsChildrenScanner ( 

    91 		MMcsChildrenScanner& aObserver, 

    92         CMenuSrvEng& aSrvEng);

    93 

    94     /**

    95      * Symbian 2nd phase constructor.

    96      */

    97     void ConstructL();

    98 

    99 private: // From CActive.

   100     

   101     /**

   102      * From CActive.

   103      */

   104     void DoCancel();

   105         

   106     /**

   107      * From CActive.

   108      */

   109     void RunL();      

   110 

   111     /**

   112     * Error handling: ignore error.

   113     * @param aErr Error code.

   114     */

   115     TInt RunError( TInt aError );

   116     

   117 private: 

   118     

   119     void AddId(TInt aId);

   120     

   121     void RemoveId(TInt aId);

   122         

   123 private:

   124 

   125 	

   126     /**

   127      * Interface for notifying changes.

   128      * Not own.

   129      */

   130 	MMcsChildrenScanner& iObserver;     

   131     

   132 	/**

   133 	 * Menu engine.

   134 	 * Not own.

   135 	 */

   136     CMenuSrvEng& iSrvEng;

   137     

   138     TBool iOpStatus;

   139     

   140     RArray<TInt> iIdBuff;

   141 

   142     };

   143 

   144 #endif /*MCSCHILDRENSCANNER_H_*/