1 /*

     2 * Copyright (c) 2007-2009 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 HARVESTEREVENTOBSERVERAO_H

    18 #define HARVESTEREVENTOBSERVERAO_H

    19 

    20 #include <e32base.h>	// For CActive, link against: euser.lib

    21 #include <e32std.h>		// For RTimer, link against: euser.lib

    22 #include <e32msgqueue.h>

    23 

    24 #include "harvestercommon.h"

    25 

    26 class RHarvesterClient;

    27 class MHarvesterEventObserver;

    28 

    29 struct THarvesterEventObserver

    30 	{

    31 	MHarvesterEventObserver& iObserver;

    32 	THarvesterEventObserverInfo iObserverInfo;

    33 	

    34 	THarvesterEventObserver(MHarvesterEventObserver& aObserver) : iObserver(aObserver) {}

    35 	

    36 	static TInt CompareObserverIds(

    37 			const THarvesterEventObserver& aFirst, 

    38 			const THarvesterEventObserver& aSecond)

    39 		{

    40 		if( aFirst.iObserverInfo.iObserverId < aSecond.iObserverInfo.iObserverId )

    41 			{

    42 			return -1;

    43 			}

    44 		else if( aFirst.iObserverInfo.iObserverId > aSecond.iObserverInfo.iObserverId )

    45 			{

    46 			return 1;

    47 			}

    48 		else

    49 			{

    50 			return 0;

    51 			}

    52 		}

    53 	};

    54 

    55 NONSHARABLE_CLASS( CHarvesterEventObserverAO ) : public CActive

    56 	{

    57 public:

    58 	// Cancel and destroy

    59 	~CHarvesterEventObserverAO();

    60 

    61 	// Two-phased constructor.

    62 	static CHarvesterEventObserverAO* NewL( RHarvesterClient& aHC );

    63 

    64 	// Two-phased constructor.

    65 	static CHarvesterEventObserverAO* NewLC( RHarvesterClient& aHC );

    66 

    67 public:

    68 	// New functions

    69 	// Function for making the initial request

    70 	void AddHarvesterEventObserverL( 

    71 			MHarvesterEventObserver& aHarvesterEventObserver, 

    72 			TInt aHEObserverType,

    73     		TInt aEventInterval );

    74 	

    75 	void RemoveHarvesterEventObserverL( MHarvesterEventObserver& aHarvesterEventObserver );

    76 

    77 private:	

    78 	// C++ constructor

    79 	CHarvesterEventObserverAO( RHarvesterClient& aHC );

    80 

    81 	// Second-phase constructor

    82 	void ConstructL();

    83 	

    84 	/**

    85 	 * Get next free observer ID

    86 	 * @return Observer ID

    87 	 */

    88 	TUint NextObserverId();

    89 

    90 	/**

    91 	 * Get handle to event queue. Creates event queue if it doesn't exist. 

    92 	 * @return Event queue handle

    93 	 */

    94 	RHandleBase& GetEventQueueHandleL();

    95 

    96 private:

    97 	// From CActive

    98 	// Handle completion

    99 	void RunL();

   100 

   101 	// How to cancel me

   102 	void DoCancel();

   103 

   104 	// Override to handle leaves from RunL(). Default implementation causes

   105 	// the active scheduler to panic.

   106 	TInt RunError(TInt aError);

   107 

   108 private:	

   109 	RPointerArray<THarvesterEventObserver> iObservers;

   110 	THarvesterEventQueue iHarvesterEventQueue;

   111 	RHarvesterClient& iHarvesterClient;

   112 	};

   113 

   114 #endif // HARVESTEREVENTOBSERVERAO_H