commonuis/CommonDialogs/src/CAknFileSelectionModel.h
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:16:19 +0100
branchRCL_3
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/*
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* Copyright (c) 2002-2007 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:  Model class for file selection
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*
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*/
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#ifndef C_AKNFILESELECTIONMODEL_H
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#define C_AKNFILESELECTIONMODEL_H
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#include <bamdesca.h>   // MDesCArray
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#include <f32file.h>    // File system
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#include <apgcli.h> // RApaLsSession
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#include "CAknFileSelectionDialog.h"
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class MAknFileFilter;
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class MAknFileSelectionObserver;
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class CDirectoryLocalizer;
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class TResourceReader;
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class TCFDFileTypes;
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/**
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 *  A model class for file selection dialog. It is derived from
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 *  MDesCArray which provides an interface for listboxes to get items.
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 *  Model maintains a list of directory entries.
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 *
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 *  @lib CommonDialogs.lib
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 *  @since S60 1.2
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 */
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NONSHARABLE_CLASS(CAknFileSelectionModel) : public CBase, public MDesCArray
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    {
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public:
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0
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// Constructors and destructor
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    /**
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     * Static constructor.
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     * @param aDialogType Dialog type.
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     * @return Returns a pointer to an instance of itself.
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     */
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    static CAknFileSelectionModel* NewL(
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        const TCommonDialogType& aDialogType, CCoeEnv& aCoeEnv );
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    ~CAknFileSelectionModel();
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// New methods
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    /**
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     * Sets the current path, this is set as the root path.
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     * @param aPath The absolute path. Browsing cannot go beyond this.
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     *        This could be for example "E:\\" or "C:\\Nokia\\Images\\".
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     * @return Number of items in the new folder or system wide error code if
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     *         unsuccessful.
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     */
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    TInt SetPathL( const TDesC& aPath );
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    /**
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     * Adds a folder in the end of current path.
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     * @param aFolder A folder is added in the end of current path.
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     *        This folder is relative to current path. Trailing backslash is
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     *        added if necessary. This could be for example "Images\\".
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     * @return Number of items in the new folder or system wide error code if
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     *         unsuccessful.
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     */
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    TInt AddFolderL( const TDesC& aFolder );
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    /**
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     * Adds a filter to filter list. Ownership is taken.
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     * @param aFilter A Filter to be added.
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     */
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    void AddFilterL( MAknFileFilter* aFilter );
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    /**
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     * Changes directory into a subfolder. Updates entries.
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     * @param aFolder The name of the subfolder, trailing backslash is added if
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     *                necessary.
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     * @return Number of items in the new folder or system wide error code if
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     *         unsuccessful.
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     */
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    TInt GotoSubFolderL( const TDesC& aFolder );
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    /**
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     * Changes path to one folder up.
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     * @return Number of items in the new folder or system wide error code if
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     *         unsuccessful.
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     */
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    TInt GotoParentFolderL();
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    /**
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     * Updates the filtered entry array.
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     * @return If no errors, the number of items in filtered entry array,
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     *         otherwise system wide error code.
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     */
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    TInt UpdateItemListL();
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    /**
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     * Returns an entry from filtered entry array.
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     * @param aIndex Array index.
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     * @return Returns an entry from the current index.
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     */
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    const TEntry& Entry( const TInt& aIndex ) const;
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    /**
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     * Gets current path.
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     * @param aPath A descriptor in which the current path is stored.
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     */
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    void GetCurrentPath( TDes& aPath ) const;
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    /**
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     * Returns directory level, 0 is root.
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     * @return Returns directory level, 0 is root.
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     */
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    TInt DirectoryLevel() const;
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    /**
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     * Returns an index of a folder from list of filtered entries.
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     * This can be used for listbox to focus wanted item.
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     * @param aFolder A folder to search for.
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     * @return The index of the folder in the filtered item list,
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     *         KErrNotFound if not found.
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     */
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    TInt FolderIndex( const TDesC& aFolder ) const;
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// Functions from base classes
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    /**
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     * From MDesCArray
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     */
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    TInt MdcaCount() const;
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    /**
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     * From MDesCArray
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     */
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    TPtrC MdcaPoint( TInt aIndex ) const;
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private:    
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// New functions
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    /**
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     * Reads directory contents using RFs::GetDir.
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     * @param aDirectory Directory.
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     * @return Returns pointer to created CDir object.
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     */
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    CDir* ReadDirectory( const TDesC& aDirectory );
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    /**
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     * Test if a folder contains subfolders.
0
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     * @param aFolder Relative folder to current path.
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     * @return Returns ETrue if a folder contains subfolders.
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     */
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    TBool ContainsSubfolders( const TDesC& aFolder );
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    /**
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     * Test if a folder contains files.
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     * @param aFolder Relative folder to current path.
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     * @return Returns ETrue if a folder contains files.
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     */
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    TBool ContainsFiles( const TDesC& aFolder );
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    /**
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     * Test if a folder contains contents.
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     * @param aFolder Relative folder to current path.
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     * @return Returns ETrue if a folder contains contents.
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     */
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    TBool ContainsContents( const TDesC& aFolder, TUint aAttMask );
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    /**
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     * Get the file type icon.
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     * @param aFileName File name to get right icon.
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     * return Return incon index base on the extname of file.
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     */
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    TInt GetIconForFileL( const TDesC& aFileName ) const;
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    /**
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     * Get the file local name.
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     * @param aFileName File name to get its locallize name.
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     * @return Returns file's local name.
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     */
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    TPtrC GetLocalizedName(const TDesC& aFileName);
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    /**
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     * Test if a entry can be added in listbox.
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     * @param aEntry The entry which be added or not.
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     * @return Returns ETrue if a entry can be added.
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     */
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    TBool EntryIsAccepted( const TEntry& aEntry ) const;
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    /**
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     * Read file type and icon index from reader
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     * @param aReader Reader object
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     */
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    void ReadFileExtNameAndIconIndexL( TResourceReader& aReader );
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// Constructors and destructor
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    void ConstructL();
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    CAknFileSelectionModel(
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        const TCommonDialogType& aDialogType, CCoeEnv& aCoeEnv );
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private:    // Data
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    // Own: Current path being browsed.
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    TParse iCurrentPath;
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    // Own: An array of filtered directory entries.
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    CArrayPakFlat<TEntry>* iEntryArray;
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    /* Own: An array which item has local name of file entry 
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     * with icon index and entry index in iEntryArray
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     * */
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    CDesC16ArraySeg * iLocalFileNameArray;
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    /* Own: An array which item has local name of directory entry 
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     * with icon index and entry index in iEntryArray
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     * */
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    CDesC16ArraySeg * iLocalDirNameArray;
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    /* Own: An array which item has extent name of file entry 
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     * with icon index for the file type
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     * */
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    CArrayFixFlat<TCFDFileTypes>* iFileTypeArray;
0
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    // Own: // An array of filters.
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    CArrayPtrSeg<MAknFileFilter>* iFilterArray;
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    // Own: File server session.
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    RFs iFs;
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    // Own: Directory level.
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    TInt iDirectoryLevel;
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    // Own: Directory localiser
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    CDirectoryLocalizer* iLocalizer;
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    // Ref: Dialog type
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    const TCommonDialogType& iDialogType;
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    // Ref: Control environment
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    CCoeEnv& iCoeEnv;
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    // Own: Root folder text
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    HBufC* iRootFolderText;
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    TParse iParse;
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    // Own: A buffer for using
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    HBufC * iStringBuf;
0
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    };
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#endif // C_AKNFILESELECTIONMODEL_H