/*

* Copyright (c) 1997-2009 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:

*

*/

#if !defined(__EIKLBV_H__)

#define __EIKLBV_H__

#if !defined(__E32BASE_H__)

#include <e32base.h>

#endif

#if !defined(__GDI_H__)

#include <gdi.h>

#endif

class CListItemDrawer;

class MListBoxModel;

class CWindowGc;

class RWindowGroup;

class CWsScreenDevice;

class CWindowGc;

class RWindow;

class CListBoxViewExtension;

class CEikListBox;

//

// class MListVisibiltyObserver

//

class MListVisibilityObserver 

	{

public:

	virtual TBool IsVisible() const = 0;

	};

/**

 * List box view.

 *

 * A list box view displays the list items which are currently visible in 

 * a list box. List box views draw each of the items for display using 

 * methods defined in their associated list box drawer. 

 *

 * Together with its list item drawer, a @c CListBoxView encapsulates the 

 * on-screen appearance of data in a list box.

 *

 * List box views also encapsulate item selection, the current item, and the 

 * fundamentals of how the selection and the current item are updated according

 * to user input. Input events themselves are handled by @c CEikListBox, 

 * which calls member functions of @c CListBoxView appropriately.

 *

 * This class is sufficient for plain list box views, and may be derived from 

 * in order to provide more complex list views. @c TechView supplies and uses 

 * the classes @c CHierarchicalListBoxView and @c CSnakingListBoxView, which 

 * provide two kinds of indented list views.

 */

class CListBoxView : public CBase

	{

public:

    /**

     * Cursor movement flags. These describe the cursor movements recognised by

     * @c MoveCursorL().

     */

    enum TCursorMovement 

		{

        /** Cursors movement to next item. */

        ECursorNextItem,  	

        /** Cursors movement to previous item. */

        ECursorPreviousItem,

        /** Cursors movement to next column. */

        ECursorNextColumn,  

        /** Cursors movement to previous column. */

        ECursorPreviousColumn,  

        /** Cursors movement to previous page. */

        ECursorPreviousPage, 

        /** Cursors movement to next page. */

        ECursorNextPage,

        /** Cursors movement to the first item. */

        ECursorFirstItem,

        /** Cursors movement to the last item. */

        ECursorLastItem,

        /** Cursors movement to the next screen. */

        ECursorNextScreen,

        /** Cursors movement to the previous screen. */

        ECursorPrevScreen

        };  

    /**

     * List box view flags.

     *

     * These flags may be combined with a logical OR to get a combination of 

     * effects.

     */

	enum TFlags

		{

        /** A selection anchor exists. */

		EAnchorExists   = 0x0001,

        /** The view is emphasised. */

		EEmphasized     = 0x0002,

        /** The view is dimmed. */

		EDimmed         = 0x0004,

        /** List box view has a cursor for incremental matching. */

		EHasMatcherCursor = 0x0008,

        /** Redraw is disabled. */

		EDisableRedraw  = 0x0010,

        /** If set, selected items are painted. */

		EPaintedSelection = 0x0020,

        /** Item marking enabled. */

		EMarkSelection  = 0x0040,

        /** Item unmarking enabled. */

		EUnmarkSelection = 0x0080,

        /** Item count changes enabled. */

		EItemCountModified = 0x0100,

        /** Vertical offset has changed. */

		EOffsetChanged = 0x0200,

		};

    /**

     * Modes for modifying the selection.

     *

     * Changing the current item of a list box view may also affect which items

     * are selected. The selection mode of such an action describes how (or if)

     * the selection is altered by the action.

     *

     * Each function of @c CListBoxView which affects the current item is 

     * passed an appropriate selection mode by the calling input handler method

     * of @c CEikListBox. The mode is varied according to the keyboard 

     * modifiers held down by the user, or whether a pointer action was a tap 

     * or a sweep.

     *

     * Note that the behaviour of list box views may vary with the target 

     * phone due to the wide range of possible input devices. 

     * The following description assumes a phone with a pointer and a keyboard.

     */

    enum TSelectionMode 

        {

        /** 

         * The selection is not changed by actions while this is in effect, 

         * holding CTRL while pressing cursor up or down for example.

         */

        ENoSelection,

        /** 

         * Only a single item in the list is allowed to be selected by an 

         * action; when selecting individual items with the pointer, or 

         * moving using the cursor keys without any modifiers for example.

         */

        ESingleSelection,

        /** 

         * A single continuous run of items can be added to the selection array

         * by an action, when keyboard-selecting with the shift key held down, 

         * or when sweeping a selection with the pointer for example.

         */

        EContiguousSelection,

        /** 

         * Any single item in the list may be added to the selection by an 

         * action, when selecting or drag-selecting with the pointer when the

         * @c CTRL key is held down for example.

         */

        EDisjointSelection,

        /** 

         * Any single item in the list may be removed from the selection by an 

         * action, when unselecting for example.

         */

        EDisjointMarkSelection,

        /** 

         * Multiple items can be added to the selection array by an action, 

         * when selecting with the edit key for example.

         */

        EPenMultiselection,

        /** 

         * Mark mode is changed to @c EUnmarkSelection if item is marked or 

         * @c EMarkSelection if item is not marked by an action, when selecting

         * or unselecting item for example.

         */

        EChangeMarkMode

        };

    /** The items which are selected within a list box list. */

	typedef CArrayFix<TInt> CSelectionIndexArray;

public:

    /**

     * Destructor.

     */

	IMPORT_C ~CListBoxView();

    /**

     * C++ default constructor.

     *

     * Allocates an area of memory for a @c CListBoxView, and begins its 

     * initialisation.

     */

    IMPORT_C CListBoxView();

    /**

     * By default Symbian 2nd phase constructor is private. 

     *

     * This function completes the initialisation of a default-constructed list

     * box view. The item drawer’s graphics context is created on @c aScreen, 

     * and the list item drawer’s graphics context is set to this. See 

     * @c CListItemDrawer::SetGc().

     * 

     * @param aListBoxModel The list box model to use. 

     * @param aItemDrawer A default-constructed item drawer. 

     * @param aScreen Screen on which to display. 

     * @param aGroupWin This list box view’s window group. 

     * @param aWsWindow Window for this view. 

     * @param aDisplayArea The viewing rectangle this list box view is to use.

     * @param aItemHeight Height of a single list item. 

     */

    IMPORT_C virtual void ConstructL(MListBoxModel* aListBoxModel, 

                                     CListItemDrawer* aItemDrawer, 

                                     CWsScreenDevice* aScreen, 

                                     RWindowGroup* aGroupWin, 

                                     RWindow* aWsWindow, 

                                     const TRect& aDisplayArea, 

                                     TInt aItemHeight);

    // functions for accessing the view rect (the area of the host window in 

    // which the items are drawn)

    /**

     * Gets the list box’s view rectangle.

     *

     * @return This list box’s view rectangle.

     */

    IMPORT_C TRect ViewRect() const;

    /**

     * Sets the area within the list window in which the view can draw itself.

     * 

     * @param aRect New view rectangle.

     */

	IMPORT_C void SetViewRect(const TRect& aRect);  

	// misc. access functions for the main attributes 

    /**

     * Gets the current item’s index.

     *

     * @return Index number of the current item.

     */

	IMPORT_C virtual TInt CurrentItemIndex() const;	

    /**

     * Set the index of the current item. This function changes the current 

     * item, but does not redraw the list view or update the selection.

     *

     * @param aItemIndex Which item to make current.

     * @panic EEikPanicListBoxInvalidCurrentItemIndexSpecified Panics if the 

     *        given index is not valid. 

     */

	IMPORT_C void SetCurrentItemIndex(TInt aItemIndex); 

    /**

     * Gets the index of the item at the top of the view.

     *

     * @return The item currently displayed at the top of this list box view.

     */

	IMPORT_C TInt TopItemIndex() const;		

    /**

     * Sets the item at the top of the view by its index in the list of all 

     * items. This function also invokes @c CalcBottomItemIndex().

     *

     * @param aItemIndex Index of the item to start the view at.

     * @panic EEikPanicListBoxInvalidTopItemIndexSpecified Panics if the given

     *        index is not valid. 

     */

	IMPORT_C virtual void SetTopItemIndex(TInt aItemIndex);

    /**

     * Gets the index of the item at the bottom of this view.

     *

     * @return Index of the item at the bottom of this view.

     */

	IMPORT_C TInt BottomItemIndex() const;

    /**

     * Recalculates the index of the bottom item in the list by using the top 

     * item index and the size of the display.

     *

     * This function is called by the owning list box control when either the 

     * size of the list box or the number of items in its model changes.

     */

	IMPORT_C virtual void CalcBottomItemIndex();

    /**

     * Sets the item height.

     *

     * @param aItemHeight New item height.

     */

	IMPORT_C virtual void SetItemHeight(TInt aItemHeight);

	// functions that support incremental matching 

    /**

     * Sets the match cursor’s colour.

     *

     * @deprecated

     * @param aColor Colour in which to display the incremental match cursor.

     */

	IMPORT_C void SetMatcherCursorColor(TRgb aColor);

    /**

     * Sets the match cursor's position.

     *

     * @deprecated

     * @param aPosWithinCurrentItem Character position for the match cursor 

     *        within the current item’s string.

     */

	IMPORT_C void SetMatcherCursorPos(TInt aPosWithinCurrentItem);

    /**

     * Gets the match cursor’s position.

     *

     * @deprecated

     * @return Character position of the match cursor within the current

     *         item’s string.

     */

	IMPORT_C TInt MatcherCursorPos() const;

    /**

     * Draws the match cursor in its current screen position if the matcher 

     * cursor flag has been set.

     * 

     * This is deprecated and broken and should not be used.

     *

     * @deprecated

     */

	IMPORT_C virtual void DrawMatcherCursor();

    /**

     * Hides the matcher cursor.

     *

     * @deprecated

     */

	IMPORT_C void HideMatcherCursor();

    /**

     * Sets whether the matcher cursor flag to specify whether the match 

     * cursor is drawn.

     *

     * @deprecated

     * @param aMatcherCursor If @c ETrue, the view will draw match cursor. 

     */

	IMPORT_C void SetMatcherCursor(TBool aMatcherCursor);

    /**

     * Sets whether or not items are drawn as emphasised. 

     *

     * The function sets or resets the emphasised flag.

     *

     * @param aEmphasized If @c ETrue, this view will draw items emphasised. 

     *        If @c EFalse will not draw items emphasised.

     */

	IMPORT_C void SetEmphasized(TBool aEmphasized);

    /**

     * Sets whether items will be drawn dimmed. 

     *

     * The function sets or resets the dim flag.

     *

     * @param aDimmed If @c ETrue, this view will draw items dimmed. 

     *        If @c EFalse this view will not draw items dimmed.

     */

	IMPORT_C void SetDimmed(TBool aDimmed);

    /**

     * Disables or enables redraws.

     *

     * If this flag is set to @c ETrue, all member functions which draw items 

     * will return immediately without drawing anything. Functions which update

     * the internal state of the list box will still work, but nothing will be 

     * drawn or updated on the screen.

     *

     * @param aDisableRedraw Disables redraw if @c ETrue.

     */

	IMPORT_C void SetDisableRedraw(TBool aDisableRedraw);

    /**

     * Tests whether redraw is disabled.

     *

     * @return ETrue if redraw is disabled.

     */

	IMPORT_C TBool RedrawDisabled() const;

    /**

     * Sets the painted selection flag.

     *

     * @deprecated

     * @param aPaintedSelection If @c ETrue the painted selection flag is set 

     *        on. If @c EFalse the selection flag is set off. If NULL the 

     *        painted selection flag is cleared.

     */

	IMPORT_C void SetPaintedSelection( TBool aPaintedSelection );

	// functions that support selection

    /**

     * Gets a pointer to the selection list of this view.

     * 

     * @return Pointer to an array describing the items 

     *         in the list which are currently selected. The object pointed 

     *         at is owned by the @c CListBoxView.

     */

    IMPORT_C const CSelectionIndexArray* SelectionIndexes() const;

    /**

     * Gets a copy of the array of currently selected items. 

     * 

     * @param[in,out] aSelectionArray An instantiated @c CSelectionIndexArray.

     *                On return, contains a copy of selection indexes. 

     * @panic EEikPanicListBoxInvalidSelIndexArraySpecified Panics if the given

     *        selection index array is not valid.

     * @panic EEikPanicListBoxNoSelIndexArray Panics if selection indexes have 

     *        not been defined for this class. 

     */

	IMPORT_C void GetSelectionIndexesL(

                                CSelectionIndexArray* aSelectionArray) const;

    /**

     * Sets the currently selected items of this view from a selection index 

     * array.

     * 

     * @param aSelectionIndexes Items to select.

     * @panic EEikPanicListBoxInvalidSelIndexArraySpecified Panics if the given

     *        selection index array is not valid.

     */

    IMPORT_C void SetSelectionIndexesL(const CSelectionIndexArray* 

                                       aSelectionIndexes);

    /**

     * Resets the selection state so that there is nothing selected.

     *

     * @panic EEikPanicListBoxNoSelIndexArray Panics if selection indexes have 

     *        not been defined for this class. 

     */

    IMPORT_C void ClearSelection(); 		

    // select/highlight items without moving the cursor

    /**

     * Updates item selection.

     *

     * @param aSelectionMode The selection mode. 

     */

    IMPORT_C virtual void UpdateSelectionL(TSelectionMode aSelectionMode);  

    /**

     * Toggles the selection of an item.

     *

     * @param aItemIndex Item to toggle.

     * @panic EEikPanicListBoxNoSelIndexArray Panics if selection indexes have 

     *        not been defined for this class. 

     */

    IMPORT_C void ToggleItemL(TInt aItemIndex);

    /**

     * Selects an item by index. 

     *

     * This function leaves if memory could not be allocated for an extra item

     * in the array of selected items.

     *

     * @param aItemIndex Item to select.

     * @panic EEikPanicListBoxNoSelIndexArray Panics if selection indexes have 

     *        not been defined for this class. 

     */

    IMPORT_C void SelectItemL(TInt aItemIndex);

    /**

     * Deselects an item by index.

     *

     * @param aItemIndex Item to deselect.

     * @panic EEikPanicListBoxNoSelIndexArray Panics if selection indexes have 

     *        not been defined for this class. 

     */

    IMPORT_C void DeselectItem(TInt aItemIndex);

    /**

     * Sets the anchor to the specified item.

     *

     * @param aItemIndex The index of the item at which the anchor is set.

     */

    IMPORT_C void SetAnchor(TInt aItemIndex);

    /**

     * Resets the anchor index, the active end and the  @c EAnchorExists flag.

     */

    IMPORT_C void ClearSelectionAnchorAndActiveIndex();

	// functions that support scrolling

    /**

     * Scrolls vertically to make a particular item visible. 

     * 

     * @param aItemIndex The item to make visible.

     * @return @c ETrue if any scrolling was done, @c EFalse if no 

     *         scrolling was necessary.

     */

	IMPORT_C virtual TBool ScrollToMakeItemVisible(TInt aItemIndex);

    /**

     * Sets the index of the item to be the top item.

     *

     * @param aNewTopItemIndex The item to scroll to.

     */

	IMPORT_C virtual void VScrollTo(TInt aNewTopItemIndex);

    /**

     * Sets the index of the item to be the top item.

     *

     * This two argument version returns the area which needs redrawing via 

     * @c aMinRedrawRect&. This function does not perform the redraw.

     *

     * @param aNewTopItemIndex The distance by which to scroll. 

     * @param aMinRedrawRect On return, the minimum rectangle to redraw.

     */

    IMPORT_C virtual void VScrollTo(TInt aNewTopItemIndex, 

                                    TRect& aMinRedrawRect);

    /**

     * Scrolls horizontally by the specified number of pixels.

     *

     * @param aHScrollAmount The distance to scroll by in pixels. A negative 

     *        value scrolls to the left, a positive value scrolls to the right.

     */

    IMPORT_C virtual void HScroll(TInt aHScrollAmount);

    /**

     * Gets the offset of the visible portion of the data from the left margin

     * in pixels.

     *

     * @return The horizontal scroll offset in pixels.

     */

    IMPORT_C TInt HScrollOffset() const;

    /**

     * Sets the horizontal scroll offset in pixels.

     *

     * @param aHorizontalOffset New value for the horizontal scroll offset, in 

     *        pixels.

     */

	IMPORT_C void SetHScrollOffset(TInt aHorizontalOffset);

    /**

     * Gets the width of the widest item in the list in pixels.

     *

     * @return Data width in pixels.

     */

	IMPORT_C TInt DataWidth() const;

    /**

     * Recalculates the data width of this list box view from the item width 

     * of its list item drawer. This method is called directly by 

     * @c CEikListBox when the list box’s size changes or when data is added.

     */

	IMPORT_C virtual void CalcDataWidth();

    /**

     * Gets the visible width of the specified rectangle in pixels. This 

     * function is called by @c CListBoxView itself on its own viewing 

     * rectangle.

     *

     * @param aRect The rectangle to get the visible width for.

     * @return Visible width of @c aRect.

     */

	IMPORT_C virtual TInt VisibleWidth(const TRect& aRect) const;

    /**

     * Calculates which item should be selected in order to make a 

     * particular item visible. Calling 

     * @c VScrollTo(CalcNewTopItemIndexSoItemIsVisible(idx)), for example, 

     * would make the item whose index is @c idx visible.

     *

     * @param aItemIndex The index of the new top item.

     * @return The item to be selected. 

     */

    IMPORT_C virtual TInt CalcNewTopItemIndexSoItemIsVisible(

                                                        TInt aItemIndex) const;

	// functions that support drawing

    /**

     * Draws every visible item into the specified rectangle. 

     *

     * As implemented in @c CListBoxView, this function's argument is ignored 

     * and the internal viewing rectangle is used. See @c SetViewRect().

     *

     * @param aClipRect The rectangle to draw into, this is ignored. Default 

     *        value is NULL.

     * @panic EEikPanicListBoxNoModel Panics if the list box model for this 

     *        class has not been defined. 

     */

	IMPORT_C virtual void Draw(const TRect* aClipRect = NULL) const;

    /**

     * Draws the specified item via @c CListBoxDrawer::DrawItem() if it is 

     * visible.

     *

     * @param aItemIndex Index number of the item to draw.

     */

	IMPORT_C virtual void DrawItem(TInt aItemIndex) const;

    /**

     * Sets list box backroung text. This text is visible if the list box 

     * has no items.

     *

     * @param aText The text for the empty list box background.

     */

	IMPORT_C void SetListEmptyTextL(const TDesC& aText);

    /**

     * Gets an empty list box text. 

     * 

     * @return Pointer the empty list box text. 

     */

	inline const TDesC* EmptyListText() const;

    /**

     * Tests whether an item is selected.

     *

     * @param aItemIndex Index of item to test.

     * @return @c ETrue if the item is selected.

     */    

    IMPORT_C TBool ItemIsSelected(TInt aItemIndex) const; 

    /**

     * Tests whether an item is visible.

     *

     * @param aItemIndex Index of item to be tested.

     * @return @c ETrue if the item is visible.

     */

	IMPORT_C TBool ItemIsVisible(TInt aItemIndex) const;

    /**

     * Gets the on-screen position of an item.

     * 

     * @param aItemIndex Index of an item.

     * @return Position of the item.

     */

	IMPORT_C virtual TPoint ItemPos(TInt aItemIndex) const;

    /**

     * Gets the on-screen size of an item. 

     * 

     * As implemented in @c CListBoxView, all items report the same size. 

     * The size returned may be larger than the width of the list box view, but

     * will not be smaller.

     *

     * @param aItemIndex Index of an item. Default value is 0.

     * @return Size of the item.

     */

	IMPORT_C virtual TSize ItemSize(TInt aItemIndex=0) const;

    /**

     * Sets the colour in which to display text.

     *

     * @param aColor Colour in which to display text.

     */

	IMPORT_C void SetTextColor(TRgb aColor);

    /**

     * Sets the background colour.

     *

     * @param aColor The background colour.

     */

	IMPORT_C void SetBackColor(TRgb aColor);

    /**

     * Gets the colour in which text is to be displayed.

     *

     * @return Current text colour.

     */

    IMPORT_C TRgb TextColor() const;

    /**

     * Gets the background colour for this view.

     * 

     * @return The background colour.

     */

	IMPORT_C TRgb BackColor() const;

    /**

     * Moves the current item cursor in the specified direction. This function 

     * is called by @c CEikListBox in response to user input.

     *

     * @param aCursorMovement The cursor movement to apply. 

     * @param aSelectionMode The selection mode of the calling list box.

     */

	IMPORT_C virtual void MoveCursorL(TCursorMovement aCursorMovement, 

                                      TSelectionMode aSelectionMode);

    /**

     * Moves to the specified item, sets it as the current item and scrolls the

     * display to make the item visible.

     *

     * @param aTargetItemIndex The index of the item to which to move.

     * @param aSelectionMode The selection mode. 

     */

    IMPORT_C virtual void VerticalMoveToItemL(TInt aTargetItemIndex, 

                                              TSelectionMode aSelectionMode);

    /**

     * Converts a pixel position into an item index.

     *

     * The function returns @c ETrue and sets @c aItemIndex to the index of the

     * item whose bounding box contains @c aPosition. Returns @c EFalse if no 

     * such item exists.

     *

     * @param aPosition A position relative to the origin of the list box 

     *                  control.

     * @param aItemIndex Is set to the item at that position. 

     * @return @c ETrue if there was an item at @c aPosition.

     */

    IMPORT_C virtual TBool XYPosToItemIndex(TPoint aPosition, 

                                            TInt& aItemIndex) const;   

    /**

     * Gets the number of items that will fit into a given rectangle.

     *

     * @param aRect The rectangle.

     * @return The number of items that will fit into the given rectangle.

     */

    IMPORT_C virtual TInt NumberOfItemsThatFitInRect(const TRect& aRect) const;

    /**

     * Sets the visibility observer.

     *

     * @param aObserver New visibility observer for this control.

     */

    void SetVisibilityObserver(MListVisibilityObserver* aObserver);

    /**

     * Tests if this view is visible.

     *

     * @return @c ETrue if this view is visible. @c EFalse if this view 

     *         is not visible or does not exist.

     */

	IMPORT_C TBool IsVisible() const;

    /**

     * Gets the object used by this list box view to draw its items.

     *

     * @return Pointer to the list box item drawer. 

     */

	inline CListItemDrawer* ItemDrawer() const;

    /**

     * Not implemented.

     * 

     * @param aClientRect Not used.

     */

	IMPORT_C virtual void DrawEmptyList(const TRect &aClientRect) const;

    // disables vertical line drawing, useful only for certain 

    //custom list boxes

    /**

     * Disables vertical line drawing.

     *

     * @param aDisable @c ETrue if disabled.

     */

    void DisableVerticalLineDrawing( TBool aDisable );

    /** 

    * Deselects range between given indexes.

    *

    * @deprecated

    * @param aItemIndex1 First index of selectable range.

    * @param aItemIndex2 Second index of selectable range.

    */

    IMPORT_C void DeselectRangeL(TInt aItemIndex1, TInt aItemIndex2);

    /**

     * Sets the offset for view.

     *

     * @internal

     * @param aOffset Offset in pixels.

     */

    IMPORT_C void SetItemOffsetInPixels(TInt aOffset);

    /**

     * Gets view offset.

     *

     * @internal

     * @return View's offset.

     */

    IMPORT_C TInt ItemOffsetInPixels() const;

    /**

     * Sets scrolling state.

	 *

	 * @internal

     */

    void SetScrolling( TBool aIsScrolling );

	/**

	 * Returns item's height. All items have the same height.

	 *

	 * @internal

	 * @return Item height.

	 */ 

    TInt ItemHeight() const { return iItemHeight; }

    /**

     * Tests whether an item is partially visible.

     * Note that this returns @c EFalse also when item is fully visible,

     * i.e. the whole item area is inside the list view rectangle.

     *

     * @param  aItemIndex  Index of item to be tested.

     *

     * @return @c ETrue if the item is partially visible,

     *         @c EFalse if it's not visible or fully visible.

     */

    IMPORT_C TBool ItemIsPartiallyVisible( TInt aItemIndex ) const;

protected:

	// functions for accessing the flags

    /**

     * Gets this view’s flags.

     *

     * These flags are defined by the nested enum @c TFlags (below).

     *

     * @return List box's flags. 

     */

	inline TInt Flags() const;

    /**

     * Sets this view’s flags according to a bitmask.

     *

     * These flags are defined by the nested enum @c TFlags (below).

     *

     * @param aMask Sets new flags for the list box.

     */

	inline void SetFlags(TInt aMask);

    /**

     * Clears this view’s flags according to a bitmask.

     *

     * These flags are defined by the nested enum @c TFlags (below).

     *

     * @param aMask Flags to be removed. 

     */

	inline void ClearFlags(TInt aMask);

    /**

     * List box base class.

     * To access @c SetFlags()/ClearFlags().

     */

    friend class CEikListBox; 

	// misc. functions

    /**

     * Selects items between given indexes.

     * 

     * @deprecated

     * @param aItemIndex1 First index of selectable range.

     * @param aItemIndex2 Second index of selectable range.

     */

	IMPORT_C void SelectRangeL(TInt aItemIndex1, TInt aItemIndex2);

private:

    /**

     * Set item index directly. 

     * For CEikListBox.

     * @param aItemIndex New item index.

     */

    void SetItemIndex( TInt aItemIndex );

protected:

    /**

     * The flags for this list box. These flags are defined by the nested enum

     * @c TFlags (below).

     */

	TInt iFlags;   	

    /**

     * This view’s item drawer.

     * Not owned.

     */

	CListItemDrawer* iItemDrawer;

    /**

     * This view’s model.

     * Not owned.

     */

	MListBoxModel* iModel;

    /**

     * Width (in pixels) of the longest item in the model.

     */

	TInt iDataWidth;			

    /**

     * Index of the item at the top of the view. This is not necessarily the 

     * item at the start of the list.

     */

    TInt iTopItemIndex;

    /**

     * Index of the item at the bottom of the view. This is not necessarily the

     * item at the end of the list.

     */

    TInt iBottomItemIndex;

    /**

     * Pixel offset of the visible portion of the data from the left margin.

     */

    TInt iHScrollOffset; 

    /**

     * Index of the current item.

     */

    TInt iCurrentItemIndex;

    /**

     * Height of each item in the list in pixels.

     */

    TInt iItemHeight;

    /**

     * This list box view’s window.

     */

    RWindow* iWin;

    /**

     * The window group of this view.

     */

    RWindowGroup* iGroupWin;

    /**

     * Graphics context for the control.

     */

    CWindowGc* iGc;

    /**

     * Graphics context for the control.

     */

    TRect iViewRect;

    /**

     * The empty list text.

     */

	HBufC *iListEmptyText;

    /**

     * Indicates whether vertical line drawing is disabled.

     */

    TBool iDisableVerticalLineDrawing /*TInt iSpare*/;

private:

	TInt iMatcherCursorPos;

	TRgb iMatcherCursorColor; 

	TRgb iBackColor;

	TRgb iTextColor;

	TInt iAnchorIndex;  

	TInt iActiveEndIndex;

	CSelectionIndexArray* iSelectionIndexes;