/*

* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* which accompanies this distribution, and is available

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#if !defined(__EIKLBO_H__)

#define __EIKLBO_H__

class CEikListBox; 

/**

* List box observer interface.

*

* Each list box observer may be registered with a number of list

* boxes; each of these send events to the list box observer through

* its HandeListBoxEventL() method.

*

* Writing derived classes: 

*

* Application authors should implement a class which derives from this

* interface to receive events from list boxes

*/

class MEikListBoxObserver

    {

    public:

        /**

        * List box event codes

        */

        enum TListBoxEvent

            {

            /**  Keypress event. */

            EEventEnterKeyPressed,

            /**  Item single-tap event */

            EEventItemClicked,

            /**  Item two-taps event. */

            EEventItemDoubleClicked,

            /**  Special event: reported by directory tree and directory contents list boxes. */

            EEventItemActioned,

            /**  Editing started. */

            EEventEditingStarted,

            /**  Editing stopped. */

            EEventEditingStopped,

            /**  Pen is down and over an item */

            EEventPenDownOnItem,

            /**  Pen is dragged from item to another */

            EEventItemDraggingActioned,

            /**  Panning is started */

            EEventPanningStarted,

            /**  Panning is stopped */

            EEventPanningStopped,

            /**  Flick is started */

            EEventFlickStarted,

            /**  Flick is stopped */

            };

    public:

        /**

        * Handles list box events.

        *

        * This pure virtual function is invoked by CEikListBox to

        * notify the observer of list box events.

        *

        * @param aListBox   The originating list box.

        * @param aEventType A code for the event. Further information 

        *                   may be obtained by accessing the list box itself.

        */

        virtual void HandleListBoxEventL(CEikListBox* aListBox, TListBoxEvent aEventType)=0;

    };

#endif