mpxplugins/viewplugins/views/commoncontainer/inc/mpxcommoncontainerfilteredlist.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2008 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:  Class for providing list filtering.
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*
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*/
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#ifndef CMPXCOMMONCONTAINERFILTEREDLIST_H
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#define CMPXCOMMONCONTAINERFILTEREDLIST_H
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// INCLUDES
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#include <coemain.h>
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// FORWARD DECLARATIONS
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class CMPXMedia;
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class CMPXMediaArray;
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class TMPXItemId;
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// CLASS DECLARATION
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/**
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 * Class for providing list filtering.
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 *
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 */
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NONSHARABLE_CLASS( CMPXCommonContainerFilteredList ) :
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        public CBase
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    {
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public: // Constructing and destructing.
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    /**
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     * Two-phased constructor.
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     *
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     * @return New object.
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     */
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    static CMPXCommonContainerFilteredList* NewL();
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    /**
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     * Two-phased constructor.
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     *
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     * @return New object.
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     */
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    static CMPXCommonContainerFilteredList* NewLC();
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    /**
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     * Destructor.
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     */
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    virtual ~CMPXCommonContainerFilteredList();
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public: // Data changes.
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    /**
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     * Replaces media list with new one.
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     *
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     * @param aMediaList New media list.
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     */
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    void ReplaceMediaListL( const CMPXMediaArray& aMediaList );
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    /**
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     * Call when filtering word changes. Causes filtered list to be updated.
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     * Calling with zero-length filtering word stops filtering.
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     *
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     * @param aWord New filtering word.
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     */
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    void SetFilteringWordL( const TDesC& aWord );
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    /**
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     * Checks if full or filtered data is currently shown.
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     *
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     * @return ETrue if filtered data is shown.
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     */
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    TBool IsFiltering();
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public: // Data fetching and status information.
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    /**
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     * Checks if media list exists.
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     *
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     * @return ETrue if media list exists.
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     */
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    TBool HasMediaList();
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    /**
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     * Returns count of filtered media items.
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     *
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     * @return Count of filtered items.
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     */
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    TInt FilteredCount();
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    /**
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     * Checks that given filtered index is valid.
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     *
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     * @return ETrue if filtered index is valid.
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     */
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    TBool IsFilteredIndexValid( TInt aFilteredIndex );
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    /**
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     * Translates filtered index to real index of media list.
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     *
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     * @param aFilteredIndex Filtered index.
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     * @return Real index.
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     */
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    TInt FilteredIndexToRealIndex( TInt aFilteredIndex );
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private:
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    /**
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     * Constructor.
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     */
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    CMPXCommonContainerFilteredList();
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    /**
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     * Updates internal filtering based on new filtering word.
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     *
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     * @param aWord New filtering word.
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     */
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    void ReAdjustFilteringL( const TDesC& aWord );
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private:
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    /**
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     * Array of medias.
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     * Own.
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     */
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    CMPXMediaArray* iMediaList;
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    /**
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     * Array of real indexes that together are the filtered list.
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     * Own.
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     */
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    RArray<TInt> iFilteredMediaList;
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    /**
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     * Internal flag for indicating if data is being filtered.
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     */
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    TBool iFiltering;
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    /**
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     * Filtering word used for current filtering.
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     * Own.
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     */
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    HBufC* iFilteringWord;
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    };
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#endif // CMPXCOMMONCONTAINERFILTEREDLIST_H