/*
* Copyright (c) 2004 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: This interface defines a generic data type
*
*/
#ifndef I_ALFMODELCHANGEOBSERVER_H
#define I_ALFMODELCHANGEOBSERVER_H
//INCLUDES
namespace osncore
{
template <class T> class AlfPtrVector;
}
using namespace osncore;
namespace Alf
{
/* Forward declarations*/
class IAlfModel;
class AlfModelOperation;
/**
* An interface for observing the changes in the model.
* @lib hitchcockwidgetmodel.lib
* @since S60 ?S60_version
* @status Draft
*/
class IAlfModelChangeObserver
{
public:
/** Virtual destructor.*/
virtual ~IAlfModelChangeObserver() {}
/**
* Notify the observer that the model has changed.
*
* @param aModel The new model.
* @since S60 ?S60_version
*/
virtual void modelChanged( IAlfModel& aModel ) = 0;
/**
* Notify the observers that a number of change operations
* are about to be performed on the model.
*
* @param aArrayOfOperation An Array containing the operations performed on the model.
* @since S60 ?S60_version
*/
virtual void dataChanging( const AlfPtrVector<AlfModelOperation>& aArrayOfOperation ) = 0;
/**
* Notify the observers that a change operation
* is about to be performed on the model.
*
* @param aOperation An operation performed on the model.
* @since S60 ?S60_version
*/
virtual void dataChanging( const AlfModelOperation& aOperation ) = 0;
/**
* Notify the observers that the data of the model has been changed.
* This is called automatically after any DataChangingL() call.
*
* @since S60 ?S60_version
*/
virtual void dataChanged() = 0;
};
} // namespace Alf
#endif // I_ALFMODELCHANGEOBSERVER_H
// End of File