pimappservices/calendar/inc/calprogresscallback.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 10:12:19 +0200
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// Copyright (c) 2005-2009 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 __CALPROGRESSCALLBACK_H__
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#define __CALPROGRESSCALLBACK_H__
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#include <e32def.h>
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class MCalProgressCallBack
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/** A call back class to show the progress of long-running operations. 
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When a long-running operation is carried out on the instance view or the entry 
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view, this class is used to signal its progress, and when the function is complete.
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@publishedAll
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@released
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*/
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	{
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public:
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	/** Progress callback.
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	This calls the observing class with the percentage complete of the current operation.
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	@param aPercentageCompleted The percentage complete. */
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	virtual void Progress(TInt aPercentageCompleted) = 0;
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	/** Progress callback.
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	This calls the observing class when the current operation is finished.
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	@param aError The error if the operation failed, or KErrNone if successful. */
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	virtual void Completed(TInt aError) = 0;
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	/** 
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    Asks the observing class whether progress callbacks are required. This
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    is called once only to check if callbacks are enabled.
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	@return If the observing class returns EFalse, then the Progress() function will not be called. 
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    */
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	virtual TBool NotifyProgress() = 0;
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	};
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#endif // __CALPROGRESSCALLBACK_H__