1 /*

     2 * Copyright (c) 2006 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:  header of EventAO class.

    15 *

    16 */

    17 

    18 

    19 #ifndef C_CEVENTAO_H

    20 #define C_CEVENTAO_H

    21 

    22 //  INCLUDES

    23 #include <e32base.h>

    24 

    25 namespace multimedia

    26     {

    27     

    28     // Observer

    29     /**

    30      *  Observer that monitors the Source State changes

    31      *  @lib EnhancedMediaClient.lib

    32      *  @since S60 v3.2

    33      */    

    34     class MSourceStateObserver

    35         {

    36         public:

    37             virtual void SourceStateChanged() = 0;

    38         };

    39     

    40     /**

    41      *  Active Object that monitors the Source State Change

    42      *  Event from the Source Side

    43      *  @lib EnhancedMediaClient.lib

    44      *  @since S60 v3.2

    45      */    

    46    class CEventAO : public CActive

    47         {

    48         public:  // Constructors and destructor

    49             /**

    50              * Function to Create the Object.

    51              * @param aObserver Observer to callback the Event.

    52              */

    53             static CEventAO* NewL(MSourceStateObserver& aObserver);

    54             /**

    55             * Destructor.

    56             */

    57             virtual ~CEventAO();

    58             

    59             /**

    60              * From CActive.

    61              * Indicates that this active object has issued a

    62              * request and that it is now outstanding 

    63              *

    64              * @since S60 v3.2

    65              */            

    66             void SetActive();

    67 

    68             /**

    69              * From CEventAO.

    70              * Returns the Error Stoted on Completion of the Request

    71              *

    72              * @since S60 v3.2

    73              */            

    74             TInt Error();

    75             

    76         protected:

    77             // From CActive

    78             void RunL();

    79             void DoCancel();

    80             TInt RunError( TInt aError );

    81             

    82         private:

    83             CEventAO( MSourceStateObserver& aObserver );

    84             void ConstructL();

    85             

    86         private:

    87             /**

    88             * Observer stored to Callback

    89             */

    90             MSourceStateObserver& iObserver;

    91             /**

    92             * Error Stored upon Request Completion

    93             */

    94             TInt iError;

    95         };

    96     

    97     } // namespace multimedia

    98 

    99 #endif // C_CEVENTAO_H

   100 

   101 // End of File