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/*
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* Copyright (c) 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: This file defines class CESMRFieldEventQueue.
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*
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*/
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#ifndef CESMRFIELDEVENTQUEUE_H
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#define CESMRFIELDEVENTQUEUE_H
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#include <e32base.h>
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#include "mesmrfieldeventqueue.h"
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/**
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* CESMRFieldEventQueue defines an field event queue for ESMR GUI.
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*
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* @code
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*
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* @endcode
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*
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* @lib esmrgui.lib
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*/
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NONSHARABLE_CLASS( CESMRFieldEventQueue ) : public CBase,
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public MESMRFieldEventQueue
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{
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public:
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static CESMRFieldEventQueue* NewL();
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static CESMRFieldEventQueue* NewLC();
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/**
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* Destructor.
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*/
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virtual ~CESMRFieldEventQueue();
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// from base class MESMRFieldEventQueue
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/**
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* From MESMRFieldEventQueue.
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* Adds observer to the event queue.
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*
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* @param aObserver the observer.
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*/
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void AddObserverL( MESMRFieldEventObserver* aObserver );
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/**
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* From MESMRFieldEventQueue.
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* Removes observer from the event queue.
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*
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* @param aObserver the observer.
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*/
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void RemoveObserver( MESMRFieldEventObserver* aObserver );
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/**
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* From MESMRFieldEventQueue.
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* Notifies event to the event observers in the queue.
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* Event is notified synchronously.
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*
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* @param aEvent the event.
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*/
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void NotifyEventL( const MESMRFieldEvent& aEvent );
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/**
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* From MESMRFieldEventQueue.
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* Enques event to event queue and notifies it asynchronously to
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* the observers. Ownership of the event is transferred to the queue.
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*
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* @param aEvent the event to enque to the event queue.
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*/
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void NotifyEventAsyncL( MESMRFieldEvent* aEvent );
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/**
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* From MESMRFieldEventQueue.
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* Removes event from the event queue.
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*
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* @param aEvent the event to remove from the event queue.
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*/
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void CancelEvent( MESMRFieldEvent* aEvent );
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private:
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CESMRFieldEventQueue();
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void ConstructL();
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static TInt NotifyCallBack( TAny* aPtr );
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void DoNotifyEventAsyncL();
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TBool HasEvents() const;
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void Start();
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private: // data
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/**
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* Observer array
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*/
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RPointerArray< MESMRFieldEventObserver > iObservers;
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/**
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* Event queue
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*/
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RPointerArray< MESMRFieldEvent > iEventQueue;
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/**
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* Current observer index
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*/
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TInt iNotifyIndex;
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/**
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* Idle callback. Own.
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*/
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CIdle* iIdle;
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};
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#endif // CESMRFIELDEVENTQUEUE_H
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