idlehomescreen/inc/xnchilditerator.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 31 Mar 2010 21:17:19 +0300
branchRCL_3
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/*
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* Copyright (c) 2002-2004 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:  Iterates over a containers children
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*
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*/
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#ifndef MXNCHILDITERATOR_H
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#define MXNCHILDITERATOR_H
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//  INCLUDES
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#include <e32base.h>
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/**
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* @ingroup group_xnutils
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* 
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*  Iterates over a containers children
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*  @since Series 60 3.1
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*/
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class MXnChildIterator
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    {
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    public:  // Constructors and destructor
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        /**
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        * Destructor.
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        */
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    	virtual ~MXnChildIterator() {};
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    public: // New functions
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        /**
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        * Get the current iterator value.
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        * @since Series 60 3.1
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        * @return Current object or NULL if iterator does not point anywhere
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        */
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			virtual CBase* Value() = 0 ;
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        /**
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        * Get the next iterator value.
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        * @since Series 60 3.1
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        * @return Next object or NULL if no more values. If NULL, the iterator is not advanced.
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        * Therefore, given that iterator->Value() == x and iterator->Next() == NULL, next invocation
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        * of iterator->Value() will return x.
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        */
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			virtual CBase* NextL() = 0;
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        /**
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        * Get the previous iterator value.
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        * @since Series 60 3.1
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        * @return Previous object or NULL if no more values. If NULL, the iterator is not advanced.
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        * Therefore, given that iterator->Value() == x and iterator->Previous() == NULL, next invocation
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        * of iterator->Value() will return x.
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        */
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			virtual CBase* PreviousL() = 0;
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        /**
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        * Get the current iterator index.
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        * @since Series 60 3.1
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        * @return Current index
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        */
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			virtual TUint Index() const = 0;
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    };
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#endif      // MXnCHILDITERATOR_H
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// End of File