/*

* 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:  The OutputSheet sub-pane class, CCalcOutputSheet

*                Derived from CCoeControl

*                The CCalcOutputSheet displays histroy data.

*                History data is scroll up and down.

*

*/

#ifndef     CALCOUTSHEET_H

#define     CALCOUTSHEET_H

//  INCLUDES

#include <coecntrl.h>

#include <AknUtils.h>

#include <e32std.h>

#include <eikscrlb.h>

#include <eiksbobs.h>

#include <eiksbfrm.h>

// CONSTANTS

const TInt KCountOfPaperBitmaps(9);

//  FORWARD DECLARATIONS

class   CCalcHistory;

class   CCalcContainer;

class   CCalcAppEnv;

//  CLASS DEFINITIONS 

/**

CCalcOutputSheet : 'OutputSheet Sub-Pane' class

*/

//New scrollbar used for Touch UI layout

class CEikScrollBarFrame;

class CCalcOutputSheet

      : public CCoeControl , public MEikScrollBarObserver

    {/*Class also derived from scrollbarobserver to capture scrollbar events*/

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aContainer : Pointer of CCalcContainer class 

        */

        static CCalcOutputSheet* NewL(CCalcContainer* aContainer); 

        /**

        * Destructor.

        */

        virtual ~CCalcOutputSheet();

    public:     // New functions

        /**

        * Scroll to bottom line.

        */

        void ScrollToBottomL(); 

        /**

        * Called after clearing calculation history.

        */

        void NotifyClearHistoryL();

        /**

        * It returns whether it can scroll up or not.

        * @return ETrue : Scroll up can be done. 

        *         EFalse: Scroll up cannot be done.

        */

        TBool CanUp() const;  

        /**

        * It returns whether it can scroll down or not.

        * @return ETrue : Scroll up can be done. 

        *         EFalse: Scroll up cannot be done.

        */

        TBool CanDown() const; 

        /**

        * Output Sheet is scrolled up.

        */

        void ScrollUp();   

        /**

        * Output Sheet is scrolled down.

        */

        void ScrollDown();

        /**

        * Refresh PaperBitmap Icon when the skin change event has occured.

        */

        inline void RefreshPaperBitmap() ;

        /**

        * Refresh ScalablePaperBitmap Icon when the skin change event has occured.

        */

        inline void RefreshScalablePaperBitmap() ;

        inline void RefreshResultsLineBitmap() ;

        /**

        * From MEikScrollBarObserver: to Handle scrollbar events

        * @param CEikScrollBar* : Pointer to the scrollbar

        * @param TEikScrollEvent : Event on the Scrollbar

        */

        void HandleScrollEventL(CEikScrollBar* aScrollBar, TEikScrollEvent aEventType);

        /**

        * From CCoeControl : Notifier for changing language

        * @param aType : Type of resource change

        */

        void HandleResourceChange(TInt aType);

        void HandleResourceChangeOutSheetL(TInt aType);

    private:    // New functions

        /**

        * C++ default constructor.

        */

        CCalcOutputSheet();

        /**

        * Second-phase constructor.

        */

        void ConstructL(CCalcContainer* aContainer);

    private:

        /**

        * From CCoeControl : Set control size 

        */

        void SizeChanged();

        void SizeChangedOutSheetL();

        /**

        * From CCoeControl : Draw Output Sheet

        * @param aRect : rectangle of Output Sheet

        */

        void Draw(const TRect& aRect) const;

          /**

        * Function used to dynamically update scrollbar indicators.

        */

        void UpdateScrollIndicatorL();

    private:    // Data

        TInt iScrollOffset;     // Scroll position

        const CGulIcon* iCalcPaper; // Not own

        const CGulIcon* iCalcScalablePaper[KCountOfPaperBitmaps];

        const CGulIcon* iCalcResultsLine;

        CCalcHistory*   iCalcHistory;    // Not own

        CCalcContainer* iCalcContainer;  // Not own

        CCalcAppEnv*    iCalcAppEnv;     // Not own

        TAknLayoutRect iCalcPaperLayout[KCountOfPaperBitmaps];

        TInt iCalcOutputSheetLines;

        CAknsBasicBackgroundControlContext* iOpSheetContext;

        CArrayFixFlat<TAknLayoutText>* iOperatorLayout;

        CArrayFixFlat<TAknLayoutText>* iOperandLayout;

        CArrayFixFlat<TAknLayoutRect>* iResultsLineLayout;

        CArrayFixFlat<TAknLayoutRect>* iEqualLineLayout;

        CRepository*     iCRKey;

        TInt             iLanguage;

        TInt            iUiLanguage;

        CEikScrollBarFrame *iSBFrame;        //own -> pointer used for scrollbar frame

        TAknLayoutRect  iPaperPaneRect;

        TInt            iPrevThumbPosition;

        // the bottom right coordinate of scrollbar  

        TPoint          iSBBrPoint;

    };

#include "CalcOutSheet.inl"

#endif      //  CALCOUTSHEET_H

// End of File