1 /*

     2 * Copyright (c) 2004 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:    LandmarksUi Content File -    Database event listener.

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 

    22 

    23 

    24 

    25 #ifndef CLMKDBEVENTLISTENER_H

    26 #define CLMKDBEVENTLISTENER_H

    27 

    28 //  INCLUDES

    29 #include "EPos_Landmarks.h"

    30 #include <e32base.h>

    31 

    32 // FORWARD DECLARATIONS

    33 class CPosLandmarkDatabase;

    34 class MLmkDbObserver;

    35 

    36 // CLASS DECLARATION

    37 

    38 /**

    39 *  This class is not meant for direct usage, use CLmkEventListenerSingleton

    40 *  instead.

    41 *  This class is associated to a database since adding the first observer,

    42 *  until removing last observer. It is user's responsibility to remove all

    43 *  added observers.

    44 */

    45 class CLmkDbEventListener : public CActive

    46     {

    47     public:  // Constructors and destructor

    48         /**

    49         * Create CLmkDbEventListener object

    50         * @return newly instantiated object

    51         */

    52         static CLmkDbEventListener* NewL();

    53 

    54         /**

    55         * Destructor.

    56         */

    57         ~CLmkDbEventListener();

    58 

    59     public: // New methods

    60 

    61         /**

    62         * Only one database currently supported, leaves with

    63         * KErrNotSupported if aDb differs from already used db.

    64         * @param aObserver

    65         * @param aDb

    66         */

    67         void AddObserverL( MLmkDbObserver& aObserver,

    68                            CPosLandmarkDatabase& aDb );

    69 

    70         /**

    71         * Remove observer

    72         * @param aObserver

    73         */

    74         void RemoveObserver( MLmkDbObserver& aObserver );

    75 

    76     protected: // New methods

    77         /**

    78         * Start listening

    79         */

    80         void StartListening();

    81 

    82     protected: // From CActive

    83         void RunL();

    84         void DoCancel();

    85 

    86     protected:  // Constructors and destructor

    87         /**

    88         * C++ default constructor.

    89         * @return newly instantiated object

    90         */

    91         CLmkDbEventListener();

    92 

    93         /**

    94         * Symbian 2nd phase constructor

    95         */

    96         void ConstructL();

    97 

    98     private:    // Data

    99 

   100         TPosLmEvent iEvent;

   101 

   102         ///Ref:

   103         CPosLandmarkDatabase* iDb;

   104 

   105         ///Own:

   106         HBufC* iDbURI;

   107 

   108         ///Ref:

   109         RPointerArray<MLmkDbObserver> iObservers;

   110     };

   111 

   112 #endif      // CLMKDBEVENTLISTENER_H

   113 

   114 // End of File