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:  Event manager 

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef CVTENGEVENTMANAGER_H

    21 #define CVTENGEVENTMANAGER_H

    22 

    23 //  INCLUDES

    24 #include <e32base.h>

    25 #include "VtEngEvents.h"

    26 

    27 // FORWARD DECLARATIONS

    28 class MVtEngEventObserver;

    29 

    30 // CLASS DECLARATION

    31 

    32 /**

    33 *  This class is responsible for notifying client

    34 *  on engine events.

    35 *

    36 *  @lib videoteleng

    37 *  @since 2.6

    38 */

    39 NONSHARABLE_CLASS( CVtEngEventManager ) : public CActive

    40     {

    41     public:  // Constructors and destructor

    42         

    43         /**

    44         * Two-phased constructor.

    45         */

    46         static CVtEngEventManager* NewL( 

    47             MVtEngEventObserver& aEventObserver );

    48         

    49         /**

    50         * Destructor.

    51         */

    52         virtual ~CVtEngEventManager();

    53 

    54     public: // New functions

    55         

    56         /**

    57         * Notifies client on session state change.

    58         */

    59         void SessionStateChanged();

    60 

    61         /**

    62         * Notifies event to observer.

    63         * @param aEvent event

    64         */

    65         static void NotifyEvent( const TInt aEvent );

    66         

    67         void AddObserverL( MVtEngEventObserver* aObserver );

    68         

    69         void RemoveObserver( const MVtEngEventObserver* aObserver );

    70 

    71     private: // from CActive

    72 

    73         void RunL();

    74 

    75         void DoCancel();

    76 

    77     private:

    78 

    79         /**

    80         * Notifies event to observer

    81         */

    82         void DoNotifyEvent( const TInt aEvent );

    83 

    84         TBool QueueAsyncEvent( const TInt aEvent );

    85         

    86         /**

    87         * Queue event and signal AO.

    88         * @param aEvent Asynchronous event to be signalled.

    89         */        

    90         void QueueAndSignal( const TInt aEvent );

    91 

    92         /**

    93         * Signals AO.

    94         */

    95         void Signal();

    96 

    97     private:

    98 

    99         /**

   100         * C++ default constructor.

   101         */

   102         CVtEngEventManager();

   103         

   104         // 2nd phase constructor

   105         void ConstructL( MVtEngEventObserver& aEventObserver );

   106 

   107     private:     // Data

   108         

   109         RPointerArray<MVtEngEventObserver> iObservers;

   110         

   111         // Asynchronous events are stored in this array and 

   112         // executed in order

   113         CArrayFixFlat< TInt >*  iEventQueue;

   114 

   115     };

   116 

   117 #endif      // CVTENGEVENTMANAGER_H

   118             

   119 // End of File