// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

 // which accompanies this distribution, and is available

 // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 //

 #ifndef __CALPROGRESSCALLBACK_H__

 #define __CALPROGRESSCALLBACK_H__

 class MCalProgressCallBack

 /** A call back class to show the progress of long-running operations. 

 When a long-running operation is carried out on the instance view or the entry 

 view, this class is used to signal its progress, and when the function is complete.

 @publishedAll

 @released

 */

 	{

 public:

 	/** Progress callback.

 	This calls the observing class with the percentage complete of the current operation.

 	@param aPercentageCompleted The percentage complete. */

 	virtual void Progress(TInt aPercentageCompleted) = 0;

 	/** Progress callback.

 	This calls the observing class when the current operation is finished.

 	@param aError The error if the operation failed, or KErrNone if successful. */

 	virtual void Completed(TInt aError) = 0;

 	/** 

     Asks the observing class whether progress callbacks are required. This

     is called once only to check if callbacks are enabled.

 	@return If the observing class returns EFalse, then the Progress() function will not be called. 

     */

 	virtual TBool NotifyProgress() = 0;

 	};

 #endif // __CALPROGRESSCALLBACK_H__