/*

* Copyright (c) 2002 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:  MsgBaseControlObserver  declaration

*

*/

#ifndef INC_MSGBASECONTROLOBSERVER_H

#define INC_MSGBASECONTROLOBSERVER_H

// ========== INCLUDE FILES ================================

// ========== CONSTANTS ====================================

// ========== MACROS =======================================

// ========== DATA TYPES ===================================

enum TMsgControlEventRequest

    {

    EMsgEnsureCorrectFormPosition,

    EMsgRotateFocusUp,

    EMsgRotateFocusDown,

    EMsgHeightChanged,

    EMsgScrollForm,

    EMsgCheckIfFocusIsAboveThis,

    EMsgDenyCut,

    EMsgDenyCopy,

    EMsgDenyPaste,

    EMsgUpdateScrollbar,

    EMsgStateFlags,

    EMsgGetNaviIndicators,

    EMsgButtonPressed

    };    

// ========== FUNCTION PROTOTYPES ==========================

// ========== FORWARD DECLARATIONS =========================

class CMsgBaseControl;

// ========== CLASS DECLARATION ============================

/**

*

*/

class MMsgBaseControlObserver

    {

    public:

        /**

        * Returns whether view is initialized.

        */

        virtual TBool ViewInitialized() const = 0;

        /**

        * Returns the current view rectangle.

        * @return

        */

        virtual TRect ViewRect() const = 0;

        /**

        * Handles an event from a control.

        * @param aControl

        * @param aRequest

        * @param aDelta

        * @return

        */

        virtual TBool HandleBaseControlEventRequestL(

            CMsgBaseControl*        aControl,

            TMsgControlEventRequest aRequest,

            TInt                    aDelta) = 0;

        /**

        * Handles an event from a control.

        * @param aControl

        * @param aRequest

        * @return

        */

        virtual TBool HandleBaseControlEventRequestL(

            CMsgBaseControl*        aControl,

            TMsgControlEventRequest aRequest) = 0;

        /**

        * Handles an event from a control.

        * @param aControl

        * @param aRequest

        * @param aArg1

        * @param aArg2

        * @param aArg3

        * @return

        */

        virtual TInt HandleEditObserverEventRequestL(

            const CCoeControl*      aControl,

            TMsgControlEventRequest aRequest,

            TAny*                   aArg1 = 0,

            TAny*                   aArg2 = 0,

            TAny*                   aArg3 = 0

            ) = 0;

    };

#endif

// End of File