1 /*

     2 * Copyright (c) 2006-2007 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:  Listens to ECOM for screensaver plugin changes.

    15 *

    16 */

    17 

    18 

    19 #ifndef C_PSLNECOMLISTENER_H

    20 #define C_PSLNECOMLISTENER_H

    21 

    22 #include    <e32base.h>

    23 #include    <ecom/ecom.h>

    24 

    25 class CPslnModel;

    26 class REComSession;

    27 class MPslnScreenSaverECOMObserver;

    28 

    29 /**

    30  *  Listens to ECOM for screensaver plugin changes.

    31  *

    32  *  Monitor changes in ECOM framework and requests model to update screensaver list, 

    33  *  if a change is notified.

    34  *

    35  *  @lib PslnEngine

    36  *  @since S60 v3.1

    37  */

    38 NONSHARABLE_CLASS( CPslnEcomListener ): public CActive

    39     {

    40 public:

    41 

    42     /**

    43     * Creates a new instance of CPslnEcomListener. Listener starts immediately

    44     * monitor ECOM and continues to do so, until class is destroyed.

    45     * @param aModel reference to PslnModel.

    46     * @return new instance of CPslnEcomListener.

    47     */

    48     IMPORT_C static CPslnEcomListener* NewL( 

    49         CPslnModel& aModel, 

    50         MPslnScreenSaverECOMObserver& aObserver );

    51 

    52     virtual ~CPslnEcomListener();

    53 

    54     /**

    55     * From CActive. 

    56     * Called when Active Object is ready.

    57     */

    58     void RunL();

    59 

    60     /**

    61     * From CActive. 

    62     * Called when Active Object has been cancelled.

    63     */

    64     void DoCancel();

    65 

    66 

    67 private:

    68 

    69     /* Starts listening for ECOM changes */

    70     void StartECOMMonitoringL();

    71 

    72     CPslnEcomListener( 

    73         CPslnModel& aModel, 

    74         MPslnScreenSaverECOMObserver& aObserver );

    75 

    76     void ConstructL();

    77 

    78 private: // data

    79 

    80     /**

    81      * Psln engine model reference.

    82      * Not own.

    83      */

    84     CPslnModel* iModel;

    85 

    86     /**

    87      * ECOM session.

    88      */

    89     REComSession iSession;

    90 

    91     /**

    92      * Observer interface,

    93      * Not own.

    94      */

    95     MPslnScreenSaverECOMObserver* iObserver;

    96 

    97     };

    98 

    99 

   100 #endif // C_PSLNECOMLISTENER_H

   101 

   102 // End of file