API_REF/Public_API: comparison epoc32/include/mw/eiklbx.h

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-:666f914201fb
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-eiklbx.h
+/*
+* 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+* which accompanies this distribution, and is available
+* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Base class for an on-screen list box control from
+*               which one or more items can be selected.
+*
+*/
+#ifndef __EIKLBX_H__
+#define __EIKLBX_H__
+//  INCLUDES
+#include <gdi.h>
+#include <eikbctrl.h>
+#include <eiklbo.h>
+#include <eiksbfrm.h>
+#include <eiklbm.h>
+#include <eiklbv.h>
+#include <gulbordr.h>
+#include <eiklbed.h>
+#include <gulutil.h>
+#include <lafpublc.h>
+//  FORWARD DECLARATIONS
+enum TKeyCode;
+class RIncrMatcherBase;
+class CListItemDrawer;
+class CEikScrollBarFrame;
+class CEikButtonBase;
+class CMatchBuffer;
+class CListBoxExt;
+class CEikListBox;
+//  CLASS DECLARATION
+/**
+* Item change observer will be notified when list box items have been added or
+* removed or the list box has been reset. Observers can be added and removed by
+* using @c CEikListBox methods @c AddItemChangeObserverL() and
+* @c RemoveItemChangeObserver().
+*
+* @since 3.0
+*/
+class MListBoxItemChangeObserver
+{
+public:
+/**
+* Notification and handling of a list box item change.
+*
+* @param aListBox The source list box of this message.
+*/
+virtual void ListBoxItemsChanged(CEikListBox* aListBox) = 0;
+};
+/**
+* Item selection (marking) observer is used to let application control item marking
+* (in markable lists). Observers can be added and removed by using
+* @c CEikListBox methods @c AddSelectionObserverL() and
+* @c RemoveSelectionObserver().
+*
+* @since 3.2
+*/
+class MListBoxSelectionObserver
+{
+public:
+/**
+* Notification of entering and leaving marking mode. Marking mode
+* is enabled by long pressing shift, ctrl or hash keys (when hash key marking is enabled).
+*
+* @param aListBox The source list box of this message.
+* @param aSelectionModeEnabled ETrue, when entering selection (marking) mode.
+*/
+virtual void SelectionModeChanged(CEikListBox* aListBox, TBool aSelectionModeEnabled) = 0;
+};
+// CLASS DECLARATION
+/**
+* Base class for an on-screen list box control from which one or more items
+* can be selected.
+*
+* @c CEikListBox implements the basics of a list box. It has a scroll bar
+* frame, an item drawer, and a model, and reports events to a list box
+* observer.
+*
+* List boxes display a number of items within a scrolling frame; the items
+* in a list box which are visible at one time are represented by a list
+* box view.
+*
+* Writing derived classes:
+*
+* This class may be derived from to provide specialisations of the basic
+* list box behaviour. It is usual when subclassing CEikListBox to also
+* provide specialisations of CListItemDrawer and CListBoxView for
+* representing the data of such a list box effectively
+*/
+class CEikListBox : public CEikBorderedControl, public MEikScrollBarObserver
+{
+public:
+friend class CListBoxExt;
+public:
+/**
+* Construction flags.
+*/
+enum TFlags
+{
+/**
+* Construction flag for a list box from which the user can
+* select multiple items.
+*/
+EMultipleSelection          = SLafListBox::EMultipleSelection,
+/**
+* Construction flag for disabling extended selection.
+* If this is set the user cannot select multiple items by
+* using @c SHIFT button.
+*/
+ENoExtendedSelection        = SLafListBox::ENoExtendedSelection,
+/**
+* Construction flag that sets the list box to match user’s keystrokes
+* incrementally.
+*/
+EIncrementalMatching        = SLafListBox::EIncrementalMatching,
+/**
+* Construction flag for setting the list box as a pop-out list box.
+* Pop-out list boxes handle certain keystrokes and events differently.
+*/
+EPopout                     = SLafListBox::EPopout,
+/**
+* Construction flag that enables the indication of pointer press
+* inside the view of the list box.
+*/
+ELeftDownInViewRect         = SLafListBox::ELeftDownInViewRect,
+/**
+* Construction flag for enabling @c CEiklist box item double click
+* indication.
+*/
+EItemDoubleClicked          = SLafListBox::EItemDoubleClicked,
+/**
+* Construction flag for removing the ownership of the supplied list box
+* model from the @c CEikListBox so that the list box model will not be
+* deleted with the @c CEikListBoxes destruction.
+*/
+EKeepModel                  = SLafListBox::EKeepModel,
+/**
+* Construction flag for excluding the scroll bar.
+* If the flag is set the scroll bas is drawn ouside the window that
+* describes the scroll bars extent.
+*/
+EScrollBarSizeExcluded      = SLafListBox::EScrollBarSizeExcluded,
+/**
+* Construction flag for enabling @c CEikListBox change indication.
+*/
+EStateChanged               = SLafListBox::EStateChanged,
+/**
+* Construction flag that indicates that the list box should be created
+* to its own window.
+*/
+ECreateOwnWindow            = SLafListBox::ECreateOwnWindow,
+/**
+* Construction flag for disabling key matching.
+*/
+ENoFirstLetterMatching      = SLafListBox::ENoFirstLetterMatching,
+/**
+* Construction flag for enabling painting of selected items.
+*/
+EPaintedSelection           = SLafListBox::EPaintedSelection ,
+/**
+* Construction flag for enabling loop scrolling in which the list box
+* jumps from the last item to the first item.
+*/
+ELoopScrolling = 0x1000,
+/**
+* Construction flag for enabling @c Avkon multiselection list.
+*/
+EEnterMarks = 0x2000,       // Avkon multiselection list
+/**
+* Construction flag for enabling Avkon markable list which enables the
+* marking of several items from the list.
+*/
+EShiftEnterMarks = 0x4000,  // Avkon markable list
+/**
+* Construction flag that combines @c EPageAtOnceScrolling and
+* @c EDisableHighlight flags
+*/
+EViewerFlag = 0x8000,       // combined the two flags to fit to WORD.
+/**
+* Construction flag for enabling scrolling at a page per time so that
+* the whole list box page is scrolled to the next.
+*/
+EPageAtOnceScrolling = 0x8000, // Avkon viewers
+/**
+* Construction flag for disabling the highlighting of the selected item.
+*/
+EDisableHighlight = 0x8000,  // Avkon viewers
+/**
+* Construction flag for enabling S60 style selection of multiple items
+* from the list box.
+*/
+ES60StyleMultiselection     = SLafListBox::ES60StyleMultiselection,
+/**
+* Construction flag for enabling S60 style markable items.
+*/
+ES60StyleMarkable           = SLafListBox::ES60StyleMarkable
+};
+enum {KEikMaxMatchingBufferLength = 2};
+/**
+* Indicates who owns the scroll bar.
+*/
+enum TScrollBarOwnerShip
+{
+/**
+* Indicates that the scrollbar is not owned by an external class.
+*/
+ENotOwnedExternally=0x0000,
+/**
+* Indicates that the scrollbar is owned by an external class.
+*/
+EOwnedExternally   =0x0001
+};
+protected:
+/**
+* Used for indicating the reason why the item lost focus.
+*/
+enum TReasonForFocusLost
+{
+/**
+* Focus has been lost from the list box to an external control.
+*/
+EFocusLostToExternalControl,
+/**
+* Focus has been moved from the list box to an internal editor.
+*/
+EFocusLostToInternalEditor
+};
+public:
+/**
+* Destructor.
+*/
+IMPORT_C ~CEikListBox();
+/**
+* C++ default constructor.
+*/
+IMPORT_C CEikListBox();
+/**
+* Handles 2nd phase construction.
+*
+* Sets list box model and list item drawer. Request another @c ConstructL
+* to handle @c aParent and @c aFlags.
+*
+* @param aListBoxModel List box model that is to be used with the list box.
+* @param aListItemDrawer List item drawer that is to be used with the
+*        list box.
+* @param aParent Host @c CoeControl for the list box.
+* @param aFlags Construction flags (@c TFlags) for the list box.
+*/
+IMPORT_C void ConstructL(MListBoxModel* aListBoxModel,
+CListItemDrawer* aListItemDrawer,
+const CCoeControl* aParent,
+TInt aFlags = 0);
+/**
+* Handles 2nd phase construction.
+*
+*
+* Sets the border that is to be drawn outside the list box. Request another
+* @c ConstructL to handle list box model, list item drawer, @c aParent
+* and @c aFlags.
+*
+* @param aListBoxModel List box model that is to be used with the list box.
+* @param aListItemDrawer List item drawer that is to be used with the
+*        list box.
+* @param aParent Host @c CoeControl for the list box.
+* @param aBorder Border to be drawn outside the list box.
+* @param aFlags Construction flags (@c TFlags) for the list box.
+*/
+IMPORT_C void ConstructL(MListBoxModel* aListBoxModel,
+CListItemDrawer* aListItemDrawer,
+const CCoeControl* aParent,
+TGulBorder aBorder,
+TInt aFlags = 0);
+/**
+* Informs the @c CEikListbox of a key press.
+*
+* @param aKeyEvent Details of the key event that is being handled.
+* @param aType Defines what kind of key event is being handled e.g.
+*        @c EEventKeyUp.
+* @return @c EKeyWasConsumed if the key was handled by the method.
+*         @c EKeyWasNotConsumed if the key was not handled.
+*/
+IMPORT_C virtual TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,
+TEventCode aType);
+/**
+* Handling of pointer event within the @c CEikListBox.
+* Used for e.g. selecting an item from the list box.
+*
+* @param aPointerEvent Details of the pointer event that is being handled.
+*/
+IMPORT_C virtual void HandlePointerEventL(
+const TPointerEvent& aPointerEvent);
+/**
+* Creates an own window for the list box or draws the list box to an old
+* window defined by the @c aContainer.
+*
+* @param aContainer Defines the container where the list box will be drawn.
+*/
+IMPORT_C virtual void SetContainerWindowL(const CCoeControl& aContainer);
+/**
+* Checks the minimum size needed for the list box.
+*
+* @return The two dimensional minimum size for the list box.
+*/
+IMPORT_C virtual TSize MinimumSize();
+/**
+* This function sets a flag within the control which indicates
+* whether or not the control is dimmed (greyed out).
+*
+* @param aDimmed @c ETrue dimmed. @c EFalse not dimmed.
+*/
+IMPORT_C virtual void SetDimmed(TBool aDimmed);
+/**
+* Used for scrolling through the items in the list box.
+*
+* @param aScrollBar Scroll bar for the list box.
+* @param aEventType Type of the event that occured.
+*/
+IMPORT_C virtual void HandleScrollEventL(CEikScrollBar* aScrollBar,
+TEikScrollEvent aEventType);
+// model/view access functions
+/**
+* Gets the list box data model.
+*
+* @return Interface to the list box data model.
+*/
+IMPORT_C MListBoxModel* Model() const;
+/**
+* Gets the list box view.
+*
+* @return Interface to the list box view.
+*/
+IMPORT_C CListBoxView* View() const;
+// functions for accessing top/current/bottom item index
+/**
+* Gets the index number of the top item.
+*
+* @return Index number for the top item.
+*/
+IMPORT_C TInt TopItemIndex() const;
+/**
+* Sets the selected item to be the top item.
+*
+* @param aItemIndex Index for the item to be set as the top item.
+*/
+IMPORT_C virtual void SetTopItemIndex(TInt aItemIndex) const;
+/**
+* Gets for the bottom items index.
+*
+* @return Index for the bottom item.
+*/
+IMPORT_C TInt BottomItemIndex() const;
+/**
+* Gets the index number of the selected item.
+*
+* @return Index of the selected item.
+*/
+IMPORT_C TInt CurrentItemIndex() const;
+/**
+* Changes the current item index to the selected item index. Does not
+* redraw the list. If the item was not previously visible it is set to the
+* top item in the view.
+*
+* @param aItemIndex Defines the index of the selected item.
+*/
+IMPORT_C void SetCurrentItemIndex(TInt aItemIndex) const;
+/**
+* Changes the current item index to the selected item index and
+* redraws the view.
+*
+* @param aItemIndex Defines the index of the selected item.
+*/
+IMPORT_C void SetCurrentItemIndexAndDraw(TInt aItemIndex) const;
+// functions for dealing with the selection state
+/**
+* Gets for list boxes selection indexes.
+*
+* @return Pointer to the list boxes in array of selection indexes.
+*/
+IMPORT_C const CListBoxView::CSelectionIndexArray* SelectionIndexes() const;
+/**
+* Assigns a array of selection indexes for the list box.
+*
+* @param aArrayOfSelectionIndexes The index array that is to be assigned
+*        to the list Box.
+*/
+IMPORT_C void SetSelectionIndexesL(
+CListBoxView::CSelectionIndexArray* aArrayOfSelectionIndexes);
+/**
+* Clears the selection from the view.
+*/
+IMPORT_C void ClearSelection();
+// Functions for updating a list box's internal state after its model has
+// been updated, all of them will emit item change event to item change
+// observers.
+/**
+* Handles the addition of item to the list box.
+*/
+IMPORT_C void HandleItemAdditionL();
+/**
+* Handles the removal of an item from the list box.
+*/
+IMPORT_C void HandleItemRemovalL();
+/**
+* Handles the addition of new items to the list box and updates
+* selection indexes array.
+*
+* NOTE. This algorithm can not handle position of the list highlight
+* nor can it update the top item index correctly.
+*
+* @param aArrayOfNewIndexesAfterAddition Array of new indexes to be added.
+*/
+IMPORT_C void HandleItemAdditionL(
+CArrayFix<TInt> &aArrayOfNewIndexesAfterAddition);
+/**
+* Handles the removal of items to the list box and updates
+* selection indexes array.
+*
+* NOTE. This algorithm cannot handle position of the list highlight
+* nor can it update the top item index correctly.
+*
+* @param aArrayOfOldIndexesBeforeRemoval Array of indexes to be removed.
+*/
+IMPORT_C void HandleItemRemovalL(
+CArrayFix<TInt> &aArrayOfOldIndexesBeforeRemoval);
+/**
+* Deletes the item editor
+*/
+IMPORT_C void Reset();
+/**
+* Adds an item change observer to the listbox. Duplicates are not checked
+* (i.e. adding the same observer multiple times is not prevented).
+*
+* @since 3.0
+* @param aObserver Must be non-NULL.
+*/
+IMPORT_C void AddItemChangeObserverL( MListBoxItemChangeObserver* aObserver );
+/**
+* Removes an item change observer from the listbox.
+*
+* @since 3.0
+* @param aObserver The observer to be removed.
+* @return ETrue if removal ok, EFalse if observer was not removed (not
+*         found from the list of observers).
+*/
+IMPORT_C TBool RemoveItemChangeObserver( MListBoxItemChangeObserver* aObserver );
+// functions for accessing the item height
+/**
+* Sets the height of the item to the selected value.
+*
+* @param aHeight New height for the item.
+*/
+IMPORT_C virtual void SetItemHeightL(TInt aHeight);
+/**
+* Gets height of the item.
+*
+* @return Height of the item.
+*/
+IMPORT_C TInt ItemHeight() const;
+// functions for scrollbars
+/**
+* Creates a scrollbar frame.
+*
+* @param  aPreAlloc Boolean defining if there should be initial
+*         memory allocations.
+* @return The new scroll bar frame.
+*/
+IMPORT_C CEikScrollBarFrame* CreateScrollBarFrameL(TBool aPreAlloc=EFalse);
+/**
+* Sets the given scroll bar frame for the list box with the given
+* ownership leve.
+*
+* @param aScrollBarFrame The new frame that is going to be used.
+* @param aOwnerShip Ownership level of the scroll bar frame.
+*/
+IMPORT_C void SetScrollBarFrame(CEikScrollBarFrame* aScrollBarFrame, TScrollBarOwnerShip aOwnerShip);
+/**
+* Gets pointer for the scroll bar frame.
+*
+* @return Pointer to the scroll bar frame.
+*/
+IMPORT_C CEikScrollBarFrame* const ScrollBarFrame();
+/**
+* Updates all scroll bars.
+*/
+IMPORT_C virtual void UpdateScrollBarsL();
+// construction support functions
+/**
+* Gets the size of the rectangle required to display a pop out.
+*
+* @param aTargetItemIndex The item from which the popout originates.
+* @param aTargetYPos Vertical position of the item from which the popout
+*        originates.
+* @param aListBoxRect The list box rectangle.
+* @param aMinHeightInNumOfItems The minimum number of items for the popout.
+*/
+IMPORT_C void CalculatePopoutRect( TInt aTargetItemIndex,
+TInt aTargetYPos,
+TRect& aListBoxRect,
+TInt aMinHeightInNumOfItems = 1 );
+/**
+* Gets the size of the list box in pixels based on the height of
+* the list box in items and the length of the items in characters.
+*
+* Returns @c TSize element consisting of two elements, the height
+* and the width. Height is the number of items times the height
+* of the font in pixels. Width is the number of characters in a
+* single line times the width of the font in pixels.
+*
+* @param aWidthAsNumOfChars Width of list box in characters.
+* @param aHeightAsNumOfItems Height of list box in characters.
+* @return The size of the list box in pixels as TSize.
+*/
+IMPORT_C TSize CalcSizeInPixels(TInt aWidthAsNumOfChars,
+TInt aHeightAsNumOfItems) const;
+/**
+* Gets the width of the list box in pixels based on the width of the list
+* box in characters.
+*
+* Returns the number of characters times the width of a character
+* in pixels.
+*
+* @param aNumOfChars The number of characters.
+* @return The width of the list box in pixels.
+*/
+IMPORT_C TInt CalcWidthBasedOnNumOfChars(TInt aNumOfChars) const;
+/**
+* Gets the height of the list box in pixels based on the width of the
+* list box in characters.
+*
+* Returns the number of items times the height of the font in pixels.
+*
+* @param aNumOfItems The number of items.
+* @return The height of the list box in pixels.
+*/
+IMPORT_C TInt CalcHeightBasedOnNumOfItems(TInt aNumOfItems) const;
+/**
+* Gets the width of the list box in pixels based on the width of the
+* list box text in pixels.
+*
+* returns the width of the whole list box in pixels, which includes
+* the text width and the width of elements in the list box that have
+* an effect on the overall width.
+*
+* @param aTextWidthInPixels Width of list box text in pixels.
+* @return Required width of whole list box in pixels.
+*/
+IMPORT_C TInt CalcWidthBasedOnRequiredItemWidth(
+TInt aTextWidthInPixels) const;
+// drawing/scrolling functions
+/**
+* Draws a list box item, first scrolling the list to make it visible
+* if it is not already.
+*
+* @c DrawItem() panics if there is no list box view currently set.
+* @param aItemIndex Index of the item to reveal.
+*/
+IMPORT_C void DrawItem(TInt aItemIndex) const;
+/**
+* Makes an item visible in the list, scrolling it if necessary.
+*
+* @param aItemIndex Index of the item to reveal.
+*/
+IMPORT_C void ScrollToMakeItemVisible(TInt aItemIndex) const;
+/**
+* Redraws list item.
+* @param aItemIndex index of item to be redrawn.
+* @since 3.2
+*/
+IMPORT_C void RedrawItem( TInt aItemIndex );
+// observer support
+/**
+* Sets the observer for the list box.
+*
+* @param aObserver Wanted observer for the list box.
+*/
+IMPORT_C void SetListBoxObserver(MEikListBoxObserver* aObserver);
+/**
+* Gets the size of the vertical gap between items. This space is used
+* by the view to allow a box to be drawn around each item.
+*
+* @return Size of the vertical gap in pixels.
+*/
+IMPORT_C TInt VerticalInterItemGap() const;
+// popouts only
+/**
+* Provides a call back mechanism to the button which just launched a
+* popout menu.
+*
+* @param aButton The button which just launched a popout menu.
+*/
+IMPORT_C void SetLaunchingButton(CEikButtonBase* aButton);
+// Editing support
+/**
+* Selects an item editor for the list box.
+*
+* @param aEditor The editor that has been selected for usage.
+*/
+IMPORT_C void SetItemEditor(MEikListBoxEditor* aEditor);
+/**
+* Resets the list boxes item editor.
+*/
+IMPORT_C void ResetItemEditor();
+/**
+* Gets item editor for the current class.
+*
+* @return The item editor used by the list box class.
+*/
+IMPORT_C MEikListBoxEditor* ItemEditor();
+/**
+* Creates an item editor and starts editing the current item.
+*
+* The editor can edit the current item up to a maximum length of
+* @c aMaxLength characters. Also reports an @c EEventEditingStarted event
+* to any list box observer by default.
+*
+* The function only creates a new editor if one does not already exist.
+*
+* @param aMaxLength Maximum length of characters to edit.
+*/
+IMPORT_C virtual void EditItemL(TInt aMaxLength);
+/**
+* Stops editing and deletes the item editor.
+*
+* The function reports an @c EEventEditingStopped event to any list box
+* observer, and updates the list box model if @c aUpdateModel is @c ETrue.
+*
+* @param aUpdateModel If @c ETrue the list box model is updated.
+*/
+IMPORT_C void StopEditingL(TBool aUpdateModel);
+// functions needed for Avkon shortcuts,
+// passing information from one list to another
+/**
+* No Implementation.
+*
+* @return Always returns 0.
+*/
+IMPORT_C virtual TInt ShortcutValueForNextList();
+/**
+* No Implementation.
+*
+* @param aValue Not Used.
+*/
+IMPORT_C virtual void SetShortcutValueFromPrevList(TInt aValue);
+// pop-up positioning support
+/**
+* Gets the position and the size of the list box.
+*
+* @return A rectangle with the correct position data as
+*         well as size data for the list box.
+*/
+IMPORT_C TRect HighlightRect() const;
+/**
+* Checks whether background drawing is suppressed on item level i.e. each
+	 *  list item doesn't draw its background.
+	 *
+	 * @since S60 5.0
+	 * @return ETrue if background drawing is suppressed.
+*/
+IMPORT_C TBool BackgroundDrawingSuppressed() const;
+public: // from CCoeControl
+/**
+* From @c CCoeControl
+*
+* Gets the list of logical colours employed in the drawing of the control,
+* paired with an explanation of how they are used. Appends the list to
+* @c aColorUseList.
+*
+* @param aColorUseList List of logical colours.
+*/
+IMPORT_C virtual void GetColorUseListL(
+CArrayFix<TCoeColorUse>& aColorUseList) const;
+// not available before Release 005u
+/**
+* From @c CCoeControl
+*
+* Handles a change to the list box’s resources of type @c aType which are
+* shared across the environment, colours or fonts for example.
+*
+* @param aType The type of resources that have changed.
+*/
+IMPORT_C virtual void HandleResourceChange(TInt aType);
+// not available before Release 005u
+/**
+* From @c CCoeControl
+*
+* Sets the control as ready to be drawn.
+*
+* The application should call this function on all controls that are not
+* components in a compound control.
+*
+* The purpose of this function is that controls are not always ready to
+* be drawn as soon as they have been constructed. For example, it may
+* not be possible to set the control's extent during construction, but
+* its extent should always be set before it is drawn. Similarly, if a
+* control is to be made  invisible, this should be done before it is
+* activated.
+*
+* The default implementation sets a flag in the control to indicate it is
+* ready to be drawn. If the control is a compound control, the default
+* implementation also calls @c ActivateL() for all the control's components.
+* To get the control's components it uses @c CountComponentControls() and
+* @c ComponentControl(), which should be implemented by the compound control.
+*
+* @c ActivateL() is typically called from the control's @c ConstructL()
+* function.
+*
+* Notes:
+*
+* This function can be overridden. This is useful for doing late
+* initialisation of the control, using information that was not available
+* at the time the control was created. For example, a text editor might
+* override @c ActivateL() and use it to enquire whether it is focused: if
+* it is, it makes the cursor and any highlighting visible. At the time when
+* the editor is created, it doesn't know whether or not it has keyboard
+* focus.
+*
+* If overriding @c ActivateL(), the implementation must include a base
+* call to @c CCoeControl's @c ActivateL().
+*/
+IMPORT_C virtual void ActivateL();
+/**
+* From @c CCoeControl.
+*
+* Gets the input capabilities of the control and all its components.
+*
+* @return The input capabilities of the control.
+*/
+IMPORT_C TCoeInputCapabilities InputCapabilities() const;
+private:
+/**
+* From CAknControl
+*/
+IMPORT_C void* ExtensionInterface( TUid aInterface );
+protected:
+// Shortcuts need access to Incremental matching
+// The shortcuts will be used inside OfferkeyEventL().
+friend class AknListBoxShortCutsImplementation;
+// Avkon layout uses SetVerticalMargin, which is protected.
+friend class AknListBoxLayouts;
+/**
+* Responds to a change in focus.
+*
+* This is called whenever the control gains or loses focus,
+* as a result of a call to @c SetFocus(). A typical use of
+* @c FocusChanged() is to change the appearance of the control,
+* for example by drawing a focus rectangle around it.
+*
+* The default implementation is empty, and should be
+* overridden by the @c CCoeControl-derived class.
+*
+* @param aDrawNow Contains the value that was passed to it
+*        by @c SetFocus().
+*/
+IMPORT_C virtual void FocusChanged(TDrawNow aDrawNow);
+/**
+* Responds to changes to the size and position of the contents
+* of this control.
+*
+* For a simple control this might include text or graphics.
+* For a compound control it sets the size and position of the
+* components. It has an empty default implementation and should
+* be implemented by the CCoeControl-derived class.
+*
+* The function is called whenever @c SetExtent(), @c SetSize(),
+* @c SetRect(), @c SetCornerAndSize(), or @c SetExtentToWholeScreen()
+* are called on the control. Note that the window server does not
+* generate size-changed events: @c SizeChanged() gets called only as
+* a result of calling the functions listed above. Therefore, if a
+* resize of one control affects the size of other controls, it is
+* up to the application to ensure that it handles the re-sizing
+* of all affected controls.
+*/
+IMPORT_C virtual void SizeChanged();
+/**
+* Handles the change in case that the size of the view rectangle
+* for the list box changes.
+*/
+IMPORT_C virtual void HandleViewRectSizeChangeL();
+/**
+* Gets the number of controls contained in a compound control.
+*
+* There are two ways to implement a compound control. One way is to
+* override this function. The other way is to use the @c CCoeControlArray
+* functionality (see the @c InitComponentArrayL method).
+*
+* @return The number of component controls contained by this control.
+*/
+IMPORT_C virtual TInt CountComponentControls() const;
+/**
+* Gets an indexed component of a compound control.
+*
+* There are two ways to implement a compound control. One way is to
+* override this function. The other way is to use the @c CCoeControlArray
+* functionality (see the @c InitComponentArrayL method).
+*
+* Note: Within a compound control each component control is identified
+* by an index, where the index depends on the order the controls were
+* added: the first is given an index of 0, the next an index of 1, and
+* so on.
+*
+* @param aIndex The index of the control.
+* @return The component control with an index of aIndex.
+*/
+IMPORT_C virtual CCoeControl* ComponentControl(TInt aIndex) const;
+// functions that implement first letter and incremental matching
+/**
+* Creates a buffer for checking how well two strings match up.
+*/
+IMPORT_C void CreateMatchBufferL();
+/**
+* Empties the match buffer .
+*/
+IMPORT_C void ClearMatchBuffer() const;
+/**
+* Checks matching for the given character.
+*
+* @param aCode Character code.
+*/
+IMPORT_C void MatchTypedCharL(TUint aCode);
+/**
+* Undoes changes from the match buffer that have been caused
+* by the last match with a character.
+*/
+IMPORT_C void UndoLastChar();
+/**
+* Checks if the last character matched with the string.
+*
+* @return @c ETrue if a match was found from the buffer with the character.
+*/
+IMPORT_C TBool LastCharMatched() const;
+// functions needed for supporting scrollbars
+/**
+* Updates the position of this list box’s scroll bars’ thumbs to reflect
+* the horizontal and vertical position of the list view within the list.
+*/
+IMPORT_C virtual void UpdateScrollBarThumbs() const;
+/**
+* Get horizontal scroll granularity in pixels.
+* The granularity is the minimum size of a horizontal move of the client
+* area.
+*
+* @return Grain size for horizontal scrolling in pixels.
+*/
+IMPORT_C virtual TInt HorizScrollGranularityInPixels() const;
+/**
+* Gets the number of grains to move horizontally when a nudge button is
+* tapped.
+* For simple list boxes, this value is a fraction of the width of the
+* client area.
+*
+* @return Number of grains to move left or right on each nudge
+*/
+IMPORT_C virtual TInt HorizontalNudgeValue() const;
+/**
+* Called by various functions of this class to ensure that the top
+* item index is always a sane value. The implementation in @c CEikListBox
+* tries to ensure the minimum amount of white space at the bottom of
+* the list box. Note that this function does not affect the
+* current item index.
+*/
+IMPORT_C virtual void AdjustTopItemIndex() const;
+// navigation support functions
+/**
+* Simulates an arrow key event.
+*
+* If the list box flags include @c EMultipleSelection, this has the effect
+* of pressing @c SHIFT with the arrow key represented by @c aKeyCode.
+* Calls @c CEikListBox::OfferKeyEventL() with aKeyCode translated into a
+* key event.
+*
+* @param aKeyCode A key code.
+*/
+IMPORT_C void SimulateArrowKeyEventL(TKeyCode aKeyCode);
+/**
+* Handles a left arrow key event.
+*
+* The method used to handle the event depends on the selection mode, e.g.
+* whether the user has pressed the @c SHIFT or @c CONTROL key.
+*
+* @param aSelectionMode Not used
+*/
+IMPORT_C virtual void HandleLeftArrowKeyL(CListBoxView::TSelectionMode aSelectionMode);
+/**
+* Handles a right arrow key event.
+*
+* The method used to handle the event depends on the selection mode,
+* e.g. whether the user has pressed the @c SHIFT or @c CONTROL key.
+*
+* @param aSelectionMode Not used.
+*/
+IMPORT_C virtual void HandleRightArrowKeyL(CListBoxView::TSelectionMode aSelectionMode);
+// construction support functions
+/**
+* Restores the list box properties shared by all subclasses from a resource
+* reader. This function is not called within @c CEikListBox itself, but is
+* used by subclasses which support construction from resources.
+*
+* @param aReader A resource reader.
+*/
+IMPORT_C void RestoreCommonListBoxPropertiesL(TResourceReader& aReader);
+/**
+* Second-phase constructor.
+*
+* This protected form is overridden non-virtually by the second-phase
+* constructors of each subclass, and should be invoked by them using
+* @c CEikListBox::ConstructL().
+*
+* @param aParent The parent control. May be NULL.
+* @param aFlags Construction flags.
+*/
+IMPORT_C virtual void ConstructL(const CCoeControl* aParent, TInt aFlags = 0);
+/**
+* Completes the list box view’s construction.
+*
+* This function is called by @c ConstructL() to complete construction
+* of the resource view, calling its @c ConstructL() with appropriate
+* arguments and assigning it to @c iView. Also prepares the view for use.
+*/
+IMPORT_C virtual void CreateViewL();
+/**
+* Creates the list box view.
+*
+* The function is called by @c ConstructL() to create an instance of
+* the appropriate list box view class for this list box. The returned
+* instance is owned by this object, and does not have to have its
+* second-phase constructor run. This function is called by @c CreateViewL().
+*
+* @return Pointer to a newly constructed list box view for this object.
+*/
+IMPORT_C virtual CListBoxView* MakeViewClassInstanceL();
+/**
+* Sets the view rectangle from the client rectangle making sure a whole
+* number of items is displayed.
+*
+* @param aClientRect  The client rectangle
+*/
+IMPORT_C void SetViewRectFromClientRect(const TRect& aClientRect);
+/**
+* Calculates the client area.
+*
+* This method is called by various functions of this class to
+* recalculate the extent of the client area from @c iViewRect. This
+* implementation takes into account any rounding of the viewing
+* rectangle made to fit a whole number of items.
+*
+* @param aClientRect On return contains a size for the client area
+*        in pixels.
+*/
+IMPORT_C virtual void RestoreClientRectFromViewRect( TRect& aClientRect) const;
+/**
+* Rounds down the height of the rectangle (if necessary) so that
+* only a whole number of items can be displayed inside the list box.
+*
+* @param aRect The rectangle to be modified.
+* @return The number of pixels reduced.
+*/
+IMPORT_C virtual TInt AdjustRectHeightToWholeNumberOfItems( TRect& aRect) const;
+// accessor for Laf members
+/**
+* Gets list box margins.
+*
+* @return The list box margins in pixels.
+*/
+IMPORT_C TMargins8 ListBoxMargins() const;
+// various accessors for private data members
+/**
+* This function gets the horizontal margin. Use
+* @c CEikListBox::ListBoxMargins() instead, as this
+* provides a more accurate value due to the bit shifting involved.
+*
+* @deprecated Use @c CEikListBox::ListBoxMargins()
+* @return The horizontal margin in pixels.
+*/
+IMPORT_C TInt HorizontalMargin() const;
+/**
+* This function gets the vertical margin. This function
+* is deprecated, use @c CEikListBox::ListBoxMargins() instead,
+* this provides a more accurate value due to the bit
+* shifting involved.
+*
+* @deprecated Use @c CEikListBox::ListBoxMargins()
+* @return The vertical margin in pixels.
+*/
+IMPORT_C TInt VerticalMargin() const;
+/**
+* Sets the horizontal margin.
+*
+* @param aMargin The required horizontal margin.
+*/
+IMPORT_C void SetHorizontalMargin(TInt aMargin);
+/**
+* Sets the vertical margin.
+*
+* @param aMargin The required vertical margin.
+*/
+IMPORT_C void SetVerticalMargin(TInt aMargin);
+/**
+* Gets a pointer to the match buffer. Returns
+* NULL if the match buffer does not exist.
+*
+* @return Pointer to the match buffer.
+*/
+IMPORT_C RIncrMatcherBase* MatchBuffer() const;
+/**
+* Gets the view rectangle height adjustment.
+*
+* These are the adjustments that were made to the
+* view rectangle when the @c SetViewRectFromClientRect()
+* function was called.
+*
+* @return Height adjustment.
+*/
+IMPORT_C TInt ViewRectHeightAdjustment() const;
+/**
+* Gets the background colour.
+*
+* @return The background colour.
+*/
+IMPORT_C TRgb BackColor() const;
+/**
+* Sets the view rectangle height adjustment.
+*
+* @param aAdjustment New adjustment.
+*/
+IMPORT_C void SetViewRectHeightAdjustment(TInt aAdjustment);
+// misc functions
+/**
+* Reports a list box event to any observer of this list box.
+* This function returns immediately if no observer is set.
+*
+* @param aEvent The event to report.
+*/
+IMPORT_C virtual void ReportListBoxEventL( MEikListBoxObserver::TListBoxEvent aEvent );
+/**
+* Redraws the specified area of this list box into the specified rectangle.
+*
+* @param aRect Rectangle to be redrawn. Specified relative to the
+*        origin of this control.
+*/
+IMPORT_C virtual void Draw(const TRect& aRect) const;
+/**
+* Clears the list box margins. The list box is redrawn only if redraws
+* are enabled for the list box view.
+*/
+IMPORT_C void ClearMargins() const;
+/**
+* Sets an item as the current item, even if it is not currently
+* visible. Redraws the list box to reflect the change. This
+* should not be called from within another Draw function.
+*
+* @param aItemIndex The index of the list box item to update.
+*/
+IMPORT_C virtual void UpdateCurrentItem(TInt aItemIndex) const;
+/**
+* Handles drag events.
+*
+* This function is called by @c HandlePointerEventL() to handle pointer
+* drag events appropriately.
+*
+* @param aPointerPos The position of the @c TPointerEvent for which this
+*        handler is invoked.
+*/
+IMPORT_C virtual void HandleDragEventL(TPoint aPointerPos);
+/**
+* Tests whether an item exists.
+*
+* @param aItemIndex Index to test.
+* @return @c ETrue if the specified item exists, EFalse otherwise.
+*/
+IMPORT_C TBool ItemExists(TInt aItemIndex) const;
+/**
+* Draws the matcher cursor in the correct location for the current match.
+* If there is no match buffer, this function returns immediately;
+* otherwise the cursor is drawn on the current item using
+* @c CListBoxView::DrawMatcherCursor() after scrolling to make the current
+* item visible.
+*
+* A list box control’s matcher cursor is an on-screen cursor which is
+* drawn to indicate to the user the location of the current text. Whether
+* the cursor is drawn is dependent on the
+* @c CListBoxView::TFlags::EHasMatcherCursor flag, which may be set on the
+* list box’s view.
+*
+* Note, that CListBoxView::DrawMatcherCursor() is not implemented in S60.
+*/
+IMPORT_C void DrawMatcherCursor() const;
+/**
+* Gets the vertical gap between elements in the list box.
+*
+* @return The vertical gap between elements in the list box.
+*/
+IMPORT_C static TInt InterItemGap();
+/**
+* Updates the view colours in line with the colours in effect for the
+* Uikon environment. Has no effect if there is no view.
+*/
+IMPORT_C void UpdateViewColors();
+/**
+* Updates the item drawer colours in line with the colours in effect
+* for the Uikon environment. Has no effect if there is no item drawer.
+*/
+IMPORT_C void UpdateItemDrawerColors();
+/**
+* Notifies item change observers about item change. Subclasses must call
+* this method if they have implemented item handling functions (e.g.
+* @c HandleItemAdditionL or @c HandleItemRemovalL).
+*
+* @since S60 3.0
+*/
+IMPORT_C void FireItemChange();
+protected:	// functions which deal with extension
+/**
+* Sets the reason for the list box’s loss of focus.
+*
+* This is required so the list box can determine whether
+* loss of focus is due to an external control or an internal component.
+*
+* @param aReasonForFocusLost The reason for the loss of focus.
+*/
+IMPORT_C void SetReasonForFocusLostL( TReasonForFocusLost aReasonForFocusLost );
+/**
+* Gets the reason for the list box’s loss of focus.
+*
+* @return The reason for the loss of focus.
+*/
+IMPORT_C TReasonForFocusLost ReasonForFocusLostL();
+/**
+* Tests whether the list box match buffer exists.
+*
+* @return @c ETrue if the list box match buffer exists.
+@c EFalse if the list box match buffer does not exist.
+*/
+IMPORT_C TBool IsMatchBuffer() const;
+/**
+* Checks for a list box extension. Attempts to create one if not present.
+*
+* This function leaves if an extension cannot be created.
+*/
+void CheckCreateExtensionL();
+/**
+* Checks for a list box extension. Creates one if not present.
+*
+* @return @c ETrue if a list box extension already existed or
+*         if there was no previous extension and a new extension
+*         class was created successfully.
+*         @c EFalse if there was no previous extension and a new one
+*         could not be constructed.
+*/
+TBool CheckCreateExtension();
+/**
+* Checks the list box match buffer exists. If a buffer does not
+* exist, one is created.
+*/
+void CheckCreateBufferL();
+/**
+* Gets the list box match buffer.
+*
+* @return The list box match buffer.
+*/
+CMatchBuffer* Buffer() const;
+protected:
+/**
+* Creates a scroll bar frame layout according to @c aLayout.
+*
+* @param aLayout Defines the layout.
+*/
+IMPORT_C void CreateScrollBarFrameLayout(TEikScrollBarFrameLayout& aLayout) const;
+/**
+* If MiddleSoftKey is either Mark or Unmark, this method sets MSK
+* according to the current item selection state.
+*/
+void UpdateMarkUnmarkMSKL() const;
+public:
+/**
+* @return Event modifiers for the @c CEikListBox.
+*/
+IMPORT_C TInt EventModifiers();
+/*
+* Returns ETrue if list has ES60StyleMultiselection flag.
+*/
+IMPORT_C TBool IsMultiselection();
+/**
+* Creates a scrollbar for the listbox. The caller may choose if the scrollbar is requested
+* remotely via the mop chain from parent control
+*
+* @param	aPreAlloc Is the scrollbar created immediately or when taking in to use
+* @param	aRemote If True, the scrollbar is obtained via mop-chain from
+*           parent control. If used, the listbox only sets the scrollbar
+*           values. The scrollbar position and size must set in the parent
+*           control's code.
+*
+* @return	CEikScrollBarFrame*	pointer to scrollbar frame object
+*/
+IMPORT_C CEikScrollBarFrame* CreateScrollBarFrameL(TBool aPreAlloc, TBool aRemote);
+/**
+* Creates a scrollbar for the listbox. The caller may choose if the scrollbar is requested
+* remotely via the mop chain from parent control
+*
+* @param    aPreAlloc Is the scrollbar created immediately or when taking in to use
+* @param    aRemote If True, the scrollbar is obtained via mop-chain from
+*           parent control. If used, the listbox only sets the scrollbar
+*           values. The scrollbar position and size must set in the parent
+*           control's code.
+* @param    aWindowOwning Does the created scrollbar create own window or
+*           is it compound control. The listbox uses a window owning
+*           scrollbar by default.
+*
+* @return    CEikScrollBarFrame*    pointer to scrollbar frame object
+*/
+IMPORT_C CEikScrollBarFrame* CreateScrollBarFrameL(TBool aPreAlloc, TBool aRemote, TBool aWindowOwning);
+/**
+* By default markable listbox has middle softkey observer, which handles
+* Mark / Unmark functionality. By this method, the caller may disable default
+* observer.
+*
+* @since S60 3.1
+*
+* @param    aEnable If EFalse, disables default middle softkey observer
+*           for markable lists. ETrue enables observer again.
+*/
+IMPORT_C void EnableMSKObserver(TBool aEnable);
+/**
+* Called from MSK observer when shift+MSK have been pressed
+*
+* @Since S60 3.1
+*/
+void DoShiftMSKMarkingL();
+/**
+* This method is only called by CEikButtonGroupContainer when MSK observer
+* is enabled and CEikButtonGroupContainer is deleted.
+*
+* @Since S60 3.1
+*/
+void InformMSKButtonGroupDeletion();
+/**
+* Adds a selection (item marking) observer to the listbox. Duplicates are not checked
+* (i.e. adding the same observer multiple times is not prevented).
+*
+* @since 3.2
+* @param aObserver Must be non-NULL.
+*/
+IMPORT_C void AddSelectionObserverL( MListBoxSelectionObserver* aObserver );
+/**
+* Removes a selection (item marking) observer from the listbox.
+*
+* @since 3.2
+* @param aObserver The observer to be removed.
+*/
+IMPORT_C void RemoveSelectionObserver( MListBoxSelectionObserver* aObserver );
+/**
+* This switches listbox into selection mode. Basicly only changes MSK and
+* informs selection observers about the change.
+*
+* @since 3.2
+* @param aEnable ETrue when entering into selection mode, EFalse when leaving
+*/
+void ChangeSelectionMode(TBool aEnable);
+/**
+* Sets the number of list items that form one grid line.
+	*
+	* @since S60 5.0
+	* @param aItems Number of items in one grid line.
+	*/
+IMPORT_C void SetItemsInSingleLine(TInt aItems);
+/**
+* Removes pointer event filtering for list items.
+*
+* When there are two pointer up events on the same item at short interval,
+* listbox will only get the first one and drop the second one. This method forces listbox to handle all pointer up events.
+*
+* @since S60 5.0
+*
+* @param aItemIndexes Array of item indexes to be added.
+**/
+IMPORT_C void SetPointerEventFilterDisabledL( const CArrayFix<TInt>& aItemIndexes );
+/**
+* Scrolls the view by the given amount of pixels while keeping the
+* physics parameters up-to-date.
+* This should be called when scrolling the list box view except for
+* when it is done by list dragging (e.g. scrolling with scroll bar).
+*
+* @param  aDeltaPixels  Amount of pixels to scroll the view.
+*
+* @since 5.0
+*/
+IMPORT_C void HandlePhysicsScrollEventL( TInt aDeltaPixels );
+/**
+* Disables the kinetic scrolling functionality in the list.
+* By default the feature is enabled.
+*
+* @param  aDisabled  @c ETrue to disable kinetic scrolling,
+*                    @c EFalse otherwise.
+*
+* @since 5.0
+*/
+IMPORT_C void DisableScrolling( TBool aDisabled );
+/**
+* Checks if the kinetic scrolling is currently enabled in the list.
+*
+* @return @c ETrue if kinetic scrolling is enabled, @c EFalse otherwise.
+*
+* @since 5.0
+*/
+IMPORT_C TBool ScrollingDisabled();
+/**
+* Suspends transitions effects.
+*
+* @since S60 5.0
+*
+* @param aSuspend ETrue to suspend effects, EFalse to re-enable them.
+*/
+IMPORT_C void SuspendEffects( TBool aSuspend );
+private:
+IMPORT_C virtual void CEikListBox_Reserved(); // listbox use only
+void HorizontalScroll(TInt aScrollAmountInPixels);
+void DrawItemInView(TInt aItemIndex) const;
+void ClearMargins(CWindowGc& aGc) const;
+TKeyResponse DoOfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType);
+void UpdateScrollBarColors(CEikScrollBar* aScrollBar);
+void UpdateScrollBarsColors();
+void HandleItemRemovalWithoutSelectionsL();
+/**
+* Scrolls the view by the given amount of pixels.
+*
+* @param  aOffset   Amount of offset in pixels.
+* @param  aDrawNow  Whether or not the view is be drawn.
+*                   If @c EFalse then only the logical state is updated.
+*
+* @internal
+* @since 5.0
+*/
+void ScrollView( const TInt aOffset, TBool aDrawNow );
+/**
+* Handles pointer events if physics are enabled.
+*
+* @return @c ETrue if the event was consumed by kinetic scrolling.
+*
+* @internal
+* @since 5.0
+*/
+TBool HandlePhysicsPointerEventL( const TPointerEvent& aPointerEvent );
+/**
+* Selects an item and draws highlight to it.
+*
+* @param  aItemIndex  Index of the highlighted item.
+*
+* @internal
+* @since 5.0
+*/
+void UpdateHighlightL( TInt aItemIndex );
+protected:
+/** Flags for this list box  */
+TInt iListBoxFlags;
+/** This List box's view  */
+CListBoxView* iView;
+/** Item drawer for this list box */
+CListItemDrawer* iItemDrawer;
+/** Data model for this list box */
+MListBoxModel* iModel;
+/** Height of each item in the list */
+TInt iItemHeight;
+/** The scroll bar used by this control */
+CEikScrollBarFrame* iSBFrame;
+/** Identifies if the scroll bar is owned by this list */
+TScrollBarOwnerShip iSBFrameOwned;
+/** The required height of this list box expressed in
+* terms of a number of items.
+*/
+TInt iRequiredHeightInNumOfItems;
+/**
+* Defines which button launched the popout.
+*/
+CEikButtonBase* iLaunchingButton; // only used by popouts
+/** The button which just launched a popout menu. */
+MEikListBoxObserver* iListBoxObserver;
+private:
+TRgb iBackColor;
+//  TInt iHorizontalMargin;
+//  TInt iVerticalMargin;
+TMargins8 iMargins ;
+CListBoxExt* iListBoxExt;
+TInt iViewRectHeightAdjustment;
+MEikListBoxEditor* iItemEditor;
+TBool* iLbxDestroyed;
+TBool iLastCharMatched;
+TInt iSpare;
+};
+/**
+* This is a list box that scrolls horizontally, displaying its items
+* in as many vertical columns as needed. Columns are arranged across
+* the control from left to right; within columns, items are arranged
+* from top to bottom. The flow of items or text ‘snakes’ across the
+* face of the control.
+*
+* This is a flexible control class that makes good use of short, wide
+* display areas; for instance, subclasses of @c CEikSnakingListBox could
+* be used for file lists or for a control panel. A standard user
+* subclass, @c CEikSnakingTextListBox, also exists.
+*
+* @since Symbian 5.0
+*/
+class CEikSnakingListBox : public CEikListBox
+{
+public:
+/**
+* C++ standard constructor
+*/
+IMPORT_C CEikSnakingListBox();
+/**
+* Destructor
+*/
+IMPORT_C ~CEikSnakingListBox();
+/**
+* Creates an instance of the view class.
+*
+* This function is called during construction to create
+* (but not second-phase construct) an instance of the correct view
+* class for this list box control. In the case of the snaking list
+* box, a @c CSnakingListBoxView is returned.
+*
+* This function overrides @c CEikListBox::MakeViewClassInstanceL().
+*
+* @return The view which will be used by the list box being created
+*/
+IMPORT_C virtual CListBoxView* MakeViewClassInstanceL();
+/**
+* Sets the top item’s index.
+*
+* @param aItemIndex Index of the item to set as the top item.
+*/
+IMPORT_C virtual void SetTopItemIndex(TInt aItemIndex) const;
+/**
+* Gets the width of this list box’s columns.
+*
+* @return Width of each column.
+*/
+IMPORT_C TInt ColumnWidth() const;
+/**
+* Sets the width of all columns in the list box.
+*
+* @param aColumnWidth New column width.
+*/
+IMPORT_C void SetColumnWidth(TInt aColumnWidth);
+public: //from CCoeControl
+/**
+* From @c CCoeControl.
+*
+* Handles pointer events.
+*
+* @param aPointerEvent The pointer event.
+*/
+IMPORT_C void HandlePointerEventL(const TPointerEvent& aPointerEvent);
+protected:
+/**
+* Handles a change in size of the viewing rectangle.
+*
+* This function is called by framework functions to update the content,
+* view, and scroll bars of this list box after the viewing rectangle has
+* changed size. This implementation ensures that the current item is
+* visible after a resize.
+*/
+IMPORT_C virtual void HandleViewRectSizeChangeL();
+/**
+* Handles a left arrow key event.
+*
+* Moves the cursor into the correct column and clears any matcher buffer
+* that may have been built up.
+*
+* @param aSelectionMode Not used.
+*/
+IMPORT_C virtual void HandleLeftArrowKeyL(
+CListBoxView::TSelectionMode aSelectionMode);
+/**
+* Handles a right arrow key event.
+*
+* Moves the cursor into the correct column and clears any matcher buffer
+* that may have been built up.
+*
+* @param aSelectionMode Not used.
+*/
+IMPORT_C virtual void HandleRightArrowKeyL(
+CListBoxView::TSelectionMode aSelectionMode);
+/**
+* Gets the number of grains to move horizontally when a nudge button
+* is tapped.
+*
+* For simple list boxes, this value is a fraction of the width of the
+* client area.
+*
+* @return Number of grains to move left or right on each nudge.
+*/
+IMPORT_C virtual TInt HorizontalNudgeValue() const;
+/**
+* Gets the granularity for horizontal scrolls.
+*
+* The granularity is the minimum size of a horizontal move of the
+* client area.
+*
+* @return Grain size for horizontal scrolling in pixels.
+*/
+IMPORT_C virtual TInt HorizScrollGranularityInPixels() const;
+/**
+* Called by various functions of this class to ensure that the top
+* item index is always a sane value. The implementation in @c CEikListBox
+* tries to ensure the minimum amount of white space at the bottom of
+* the list box. Note that this function does not affect the current
+* item index.
+*/
+IMPORT_C virtual void AdjustTopItemIndex() const;
+/**
+* Handles drag events.
+*
+* This function is called by @c HandlePointerEventL() to handle
+* pointer drag events appropriately.
+*
+* @param aPointerPos The position of the @c TPointerEvent for which this
+*        handler is invoked.
+*/
+IMPORT_C virtual void HandleDragEventL(TPoint aPointerPos);
+/**
+* Calculates the client area.
+*
+* This method is called by various functions of this class to recalculate
+* the extent of the client area from @c iViewRect. This implementation
+* takes into account any rounding of the viewing rectangle made to fit a
+* whole number of items.
+*
+* @param aClientRect On return contains a size for the client area in
+*        pixels.
+*/
+IMPORT_C virtual void RestoreClientRectFromViewRect(
+TRect& aClientRect) const;
+/**
+* Rounds down the height of the rectangle (if necessary) so that only a
+* whole number of items can be displayed inside the list box.
+*
+* @param aRect The rectangle to be modified.
+* @return The number of pixels reduced.
+*/
+IMPORT_C virtual TInt AdjustRectHeightToWholeNumberOfItems(
+TRect& aRect) const;
+/**
+* Move to next or previous item according to the given parameter.
+*
+* @param aPoint Position which defines the moving direction.
+*/
+IMPORT_C void MoveToNextOrPreviousItemL(TPoint aPoint);
+protected: //from CCoeControl
+/**
+* From @c CCoeControl
+*
+* Updates the viewing rectangle of this control appropriately. The function
+* updates the viewing rectangle, and invokes @c HandleViewRectSizeChangeL().
+*/
+IMPORT_C virtual void SizeChanged();
+/**
+* From @c CCoeControl
+*
+* Gets the list of logical colours employed in the drawing of the control,
+* paired with an explanation of how they are used. Appends the list to
+* @c aColorUseList.
+*
+* @param aColorUseList List of logical colours.
+*/
+IMPORT_C virtual void GetColorUseListL(
+CArrayFix<TCoeColorUse>& aColorUseList) const;
+// not available before Release 005u
+/**
+* From @c CCoeControl.
+*
+* Handles a change to the list box’s resources of type @c aType which are
+* shared across the environment, colours or fonts for example.
+*
+* @param aType The type of resources that have changed.
+*/
+IMPORT_C virtual void HandleResourceChange(TInt aType);
+// not available before Release 005u
+private: // from CCoeControl
+IMPORT_C void Reserved_1();
+IMPORT_C void Reserved_2();
+private:
+/**
+* From CAknControl
+*/
+IMPORT_C void* ExtensionInterface( TUid aInterface );
+private:
+IMPORT_C virtual void CEikListBox_Reserved(); // listbox use only
+};
+#endif  // __EIKLBX_H__

branch	Symbian2
changeset 2	2fe1408b6811
parent 1	666f914201fb
child 4	837f303aceeb