harvester/common/inc/harvestereventmanager.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 13 Oct 2010 15:02:02 +0300
branchRCL_3
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parent 47 b73252188534
permissions -rw-r--r--
Revision: 201039 Kit: 201041
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/*
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* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  
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*/
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#ifndef HARVESTEREVENTMANAGER_H
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#define HARVESTEREVENTMANAGER_H
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#include <e32base.h>	// For CActive, link against: euser.lib
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#include <e32msgqueue.h>
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#include "harvestercommon.h"
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NONSHARABLE_CLASS( CHarvesterEventManager ) : public CBase
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	{
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public:
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	virtual ~CHarvesterEventManager();
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	IMPORT_C static CHarvesterEventManager* GetInstanceL();	
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	IMPORT_C void ReleaseInstance();
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	/*
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	 * Increase event's item count
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	 * @param aHEObserverType Event type
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	 * @param aCount Increase to event's items
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	 */
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	IMPORT_C void IncreaseItemCount( HarvesterEventObserverType aHEObserverType, TUint aCount = 1 );
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	/*
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	 * Decrease event's item count
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	 * @param aHEObserverType Event type
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	 * @param aCount Decrease to event's items
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	 */
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	IMPORT_C TBool DecreaseItemCountL( HarvesterEventObserverType aHEObserverType, TUint aCount = 1 );
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	/*
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	 * Get event's item count
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	 * @param aHEObserverType Event type
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	 * @return Event's item count
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	 */
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	IMPORT_C TUint ItemCount( HarvesterEventObserverType aHEObserverType );
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	/**
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	 * Send event to all matching observers.
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	 * @param aHEObserverType Event type
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	 * @param aHEState Event state
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	 * @param aItemsLeft Items left
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	 * @return Event sending error code
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	 */
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	IMPORT_C TInt SendEventL( HarvesterEventObserverType aHEObserverType, 
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			HarvesterEventState aHEState, TUint aItemsLeft = 0 );
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	/*
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	 * Register event observer. Leaves if registering fails.
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	 * @param aMessage Event observer's client side information
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	 */
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	IMPORT_C void RegisterEventObserverL( const RMessage2& aMessage );
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	/*
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	 * Unregister event observer. Returns error code if unregistering fails.
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	 * @param aMessage Event observer's client side information
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	 */
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	IMPORT_C TInt UnregisterEventObserver( const RMessage2& aMessage );
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	/**
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	 * Get current state of event by event type
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	 * @param Event type
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	 * @return Currect state of event
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	 */
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	IMPORT_C HarvesterEventState CurrentState( HarvesterEventObserverType aHEObserverType );
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	/**
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	 * @deprecated Client generates own "Harvester Event Observer IDs"
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	 */
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	IMPORT_C TUint GetLastClientId();
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private:
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	/**
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	 * Server side event status.
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	 */
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	struct TEventStatus
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		{
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		HarvesterEventObserverType iObserverType;
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		HarvesterEventState iCurrentState;
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		TUint iItemsLeft;
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		};
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	// C++ constructor
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	CHarvesterEventManager();
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	// Second-phase constructor
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	void ConstructL();
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	/**
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	 * Check if observer type contain wanted event type.
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	 * @param aObserverType Observer type
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	 * @param aEventType Event type
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	 * @return Does observer type contain wanted event type
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	 */
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	TBool CheckObserverType( TInt aObserverType, TInt aEventType );
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	/**
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	 * Get wanted event by event type
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	 * @param aHEObserverType Wanted event type
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	 * @return Requested event or NULL
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	 */
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	TEventStatus* GetEventStatus( HarvesterEventObserverType aHEObserverType );
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	/**
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	 * Send event to single observer.
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	 * @param aEventObserverInfo Observer to receive event
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	 * @param aHEObserverType Event type
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	 * @param aHEState Event state
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	 * @param aItemsLeft Items left
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	 * @return Event sending error code
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	 */
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	TInt SendSingleEvent( THarvesterEventObserverInfo& aEventObserverInfo, 
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			HarvesterEventObserverType aObserverType, 
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			HarvesterEventState aEventState, TUint aItemsLeft );
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19
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	static TInt CompareProperties(const THarvesterEventQueue& aFirst, const THarvesterEventQueue& aSecond);
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0
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private:
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	RArray<TEventStatus> iEventStatuses;
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	RPointerArray<THarvesterEventQueue> iEventQueues;
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	RPointerArray<THarvesterEventObserverInfo> iRegisteredObservers;
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	};
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/**
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* A helper class to store this singleton's static data.
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*/
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class CHarvesterEventManagerStaticData : public CBase
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    {
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    friend class CHarvesterEventManager;
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    public:
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    	CHarvesterEventManagerStaticData( CHarvesterEventManager* aHEM ) : iHEM(aHEM), iRefCount(1)
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            {
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            }
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        virtual ~CHarvesterEventManagerStaticData()
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            {
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            delete iHEM;
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            }
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    protected:
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    	CHarvesterEventManager* iHEM;
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        TInt iRefCount;
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    };
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#endif // HARVESTEREVENTMANAGER_H