--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/meetingrequest/mrgui/inc/mesmrfieldeventqueue.h	Wed Sep 01 12:28:57 2010 +0100
@@ -0,0 +1,79 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Field event queue interface
+*
+*/
+
+
+#ifndef MESMRFIELDEVENTQUEUE_H
+#define MESMRFIELDEVENTQUEUE_H
+
+class MESMRFieldEvent;
+class MESMRFieldEventObserver;
+
+/**
+ *  MESMRFieldEventQueue defines an iterface for field event queue.
+ *  It provides event queue for CESMRField to send events to its
+ *  event observers. The interface provides both synchronous and
+ *  asynchrounous event notification methods.
+ */
+class MESMRFieldEventQueue
+    {
+
+public:
+    
+    /**
+     * Adds observer to the event queue.
+     *
+     * @param aObserver the observer.
+     */
+    virtual void AddObserverL( MESMRFieldEventObserver* aObserver ) = 0;
+    
+    /**
+     * Removes observer from the event queue.
+     *
+     * @param aObserver the observer.
+     */
+    virtual void RemoveObserver( MESMRFieldEventObserver* aObserver ) = 0;
+    
+    /**
+     * Notifies event to the event observers in the queue.
+     * Event is notified synchronously.
+     * 
+     * @param aEvent the event.
+     */
+    virtual void NotifyEventL( const MESMRFieldEvent& aEvent ) = 0;
+
+    /**
+     * Enques event to event queue and notifies it asynchronously to
+     * the observers. Ownership of the event is transferred to the queue.
+     * 
+     * @param aEvent the event to enque to the event queue.
+     */
+    virtual void NotifyEventAsyncL( MESMRFieldEvent* aEvent ) = 0;
+    
+    /**
+     * Removes event from the event queue.
+     * 
+     * @param aEvent the event to remove from the event queue.
+     */
+    virtual void CancelEvent( MESMRFieldEvent* aEvent ) = 0;
+    
+protected:
+
+    virtual ~MESMRFieldEventQueue() {}
+
+    };
+
+#endif // MESMRFIELDEVENTQUEUE_H