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 -    Singleton class for listening events

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 

    22 

    23 

    24 

    25 #ifndef CLMKEVENTLISTENERSINGLETON_H

    26 #define CLMKEVENTLISTENERSINGLETON_H

    27 

    28 //  INCLUDES

    29 #include <coemain.h>        // CCoeStatic

    30 

    31 // FORWARD DECLARATIONS

    32 class CLmkDbEventListener;

    33 class CPosLandmarkDatabase;

    34 class MLmkDbObserver;

    35 

    36 // CLASS DECLARATION

    37 

    38 /**

    39 * CLmkEventListenerSingleton class.

    40 * It is mandatory that the user takes care of removing added observers

    41 * before they or the database becomes invalid, since this is a singleton

    42 * class and used with static methods.

    43 */

    44 class CLmkEventListenerSingleton : public CCoeStatic

    45     {

    46     public: // New methods

    47         /**

    48         * Add observer

    49         * @param aObserver

    50         * @param aDb

    51         */

    52         static void AddObserverL( MLmkDbObserver& aObserver,

    53                                   CPosLandmarkDatabase& aDb );

    54 

    55         /**

    56          * Remove observer

    57          * @param aObserver

    58          */

    59         static void RemoveObserver( MLmkDbObserver& aObserver );

    60 

    61     protected:  // Constructors and destructor

    62         /**

    63         * C++ constructor.

    64         * @return newly instantiated object

    65         */

    66         CLmkEventListenerSingleton();

    67 

    68         /**

    69         * By default Symbian 2nd phase constructor is private.

    70         */

    71         void ConstructL();

    72 

    73         /**

    74         * Destructor.

    75         */

    76         ~CLmkEventListenerSingleton();

    77 

    78     protected:    // Data

    79         ///Own:

    80         CLmkDbEventListener* iEventListener;

    81     };

    82 

    83 #endif      // CLMKEVENTLISTENERSINGLETON_H

    84 

    85 // End of File