1 /*

     2 * Copyright (c) 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:  Abstract interface for observable classes

    15 *

    16 *  Copyright © 2007 Nokia.  All rights reserved.

    17 *  This material, including documentation and any related computer

    18 *  programs, is protected by copyright controlled by Nokia.  All

    19 *  rights are reserved.  Copying, including reproducing, storing,

    20 *  adapting or translating, any or all of this material requires the

    21 *  prior written consent of Nokia.  This material also contains

    22 *  confidential information which may not be disclosed to others

    23 *  without the prior written consent of Nokia.

    24 

    25 *

    26 *

    27 */

    28 

    29 

    30 // INCLUDE FILES

    31 #include "Cam.hrh"

    32 

    33 #ifndef MCAMOBSERVABLE_H

    34 #define MCAMOBSERVABLE_H

    35 

    36 class MCamObserver;

    37 

    38 class MCamObservable

    39     {

    40 public:

    41     /**

    42     * Registers an observer if not previously registered

    43     * @param aObserver The observer concerned

    44     * @since 3.0

    45     */

    46     virtual void RegisterObserverL( MCamObserver* aObserver ) = 0;

    47 

    48     /**

    49     * Deregisters an observer if previously registered

    50     * @param aObserver The observer concerned

    51     * @since 3.0

    52     */

    53     virtual void DeregisterObserver( MCamObserver* aObserver ) = 0;

    54 

    55     /**

    56     * Broadcasts an event code to all registered observers

    57     * @param aEvent The event code

    58     */    

    59     virtual void BroadcastEvent( TCamObserverEvent aEvent ) = 0;            

    60     };

    61     

    62 #endif // MCAMOBSERVABLE_H