emailuis/uicomponents/inc/fstreenodevisualizer.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:39:21 +0200
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/*
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* Copyright (c) 2007 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:  MFsNodeVisualizer is an interface for the node visualizer.
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*
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*/
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#ifndef M_FSTREENODEVISUALIZER_H
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#define M_FSTREENODEVISUALIZER_H
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#include "fstreeitemvisualizer.h"
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/**
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 * MFsNodeVisualizer is an interface for the node visualizer.
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 *
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 * This is an interface for node visualization in the tree. This interface is 
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 * based on item visualization interface. This interface adds functions to 
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 * change node's visualization state between collapsed and unrolled.
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 * @code
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 *
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 * @endcode
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 *
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 * @lib 
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 */
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NONSHARABLE_CLASS ( MFsTreeNodeVisualizer ): public MFsTreeItemVisualizer
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    {
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public:
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    /**
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     * C++ destructor
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     */
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    virtual ~MFsTreeNodeVisualizer() {};    
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public:
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    /**
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     * Sets visualized node's state to rolled/unrolled.
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     * 
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     * @param aFlag ETrue to visualize node as rolled (collapsed).
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     */
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    virtual void SetExpanded( TBool aFlag, const MFsTreeItemData* aData = 0 ) = 0;
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    /**
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     * Returns rolled/unrolled state of the node's visualization.
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     * 
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     * @return ETrue if node is visualized as rolled (collapsed).
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     */
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    virtual TBool IsExpanded() const = 0;
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    };
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#endif // M_FSTREENODEVISUALIZER_H