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:   MNcdAsyncOperationObserver

    15 *

    16 */

    17 

    18 

    19 #ifndef NCD_ASYNC_OPERATION_OBSERVER_H

    20 #define NCD_ASYNC_OPERATION_OBSERVER_H

    21 

    22 /**

    23  * MNcdAsyncOperationObserver

    24  *

    25  * Provides callback function that may be called when an

    26  * asynchronous operation has been completed.

    27  *

    28  * @see CNcdActiveOperationObserver

    29  */

    30 class MNcdAsyncOperationObserver

    31 {

    32 

    33 public:

    34 

    35     /**

    36      * This callback function may be called when an asynchronous operation

    37      * has been completed.

    38      *

    39      * @param aError Gives the error code of the completed operation.

    40      *

    41      * @since S60 v3.2

    42      */

    43     virtual void AsyncOperationComplete( TInt aError ) = 0; 

    44 

    45 

    46 protected:

    47 

    48     /**

    49      * The destructor of an interface is set virtual to make sure that

    50      * the destructors of derived classes are called appropriately when the

    51      * object is destroyed.

    52      *

    53      * Destructor is defined as protected to prevent direct use of delete on 

    54      * observer interface pointer.

    55      *

    56      * @since S60 v3.2

    57      */

    58     virtual ~MNcdAsyncOperationObserver() { }

    59 

    60 };

    61 

    62 #endif // NCD_ASYNC_OPERATION_OBSERVER_H