1 /*

     2 * Copyright (c) 2009 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:

    15 *

    16 */

    17 #ifndef DATAOBSERVER_H

    18 #define DATAOBSERVER_H

    19 

    20 #include <e32base.h>

    21 

    22 class MHsDataObserver {

    23 public:

    24     virtual void DataChanged() =0;

    25 };

    26 

    27 class CHsDataObserver: public CBase,

    28                        public MHsDataObserver

    29 {

    30 public:

    31     virtual void Cancel(const RMessage2& reason) =0;

    32 };

    33 

    34 class MHsDataObserverStorage

    35 {

    36 public:

    37     virtual void PushL(CHsDataObserver*) =0;

    38     virtual void Pop(CHsDataObserver*) =0;

    39     virtual void Cancel(const RMessage2& reason) =0;

    40 };

    41 

    42 #endif //DATAOBSERVER_H