/*

* Copyright (c) 2006 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:  Implementation class for TextBox custom drawer

*

*/

#ifndef CMIDTEXTBOXEDWINCUSTOMDRAW_H

#define CMIDTEXTBOXEDWINCUSTOMDRAW_H

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

#include <e32base.h>

#include <lafmain.h>

#include <AknUtils.h>

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

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

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

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

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

class CGulIcon;

class CEikEdwin;

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

/**

*  Implementation of MFormCustomDraw

*       Class is used to draw editor lines to text editor.

*

* @since 3.1

*/

NONSHARABLE_CLASS(CMIDTextBoxEdwinCustomDraw): public CLafEdwinCustomDrawBase

{

public:

    /**

    * Static constructor.

    *

    * @param    aEnv reference to LAF interface.

    * @param    aParentCustomDraw ref on default implementation instance

    * @param    aParentControl ref to the parent control (edwin)

    *

    * @return   pointer to instance

    */

    static CMIDTextBoxEdwinCustomDraw* NewL(const MLafEnv& aEnv,

    const MFormCustomDraw* aParentCustomDraw,

    const CEikEdwin* aParentControl);

    /**

    * Destructor

    */

    virtual ~CMIDTextBoxEdwinCustomDraw();

    /**

     * Calculates layout with given parent rectangle

     * @param aParentRect an editor rectangle

     */

    void CalculateLayout(TRect aParentRect);

public: // Functions from base classes

    /**

    * From MFormCustomDraw

    * See frmtlay.h for more information.

    */

    void DrawBackground(const TParam& aParam,

                        const TRgb& aRgb,

                        TRect& aDrawn) const;

    /**

    * From MFormCustomDraw

    * See frmtlay.h for more information.

    */

    void DrawText(const TParam& aParam,

                  const TLineInfo& aLineInfo,

                  const TCharFormat& aFormat,

                  const TDesC& aText,

                  const TPoint& aTextOrigin,

                  TInt aExtraPixels) const;

    /**

    * From MFormCustomDraw

    * See frmtlay.h for more information.

    */

    void DrawLineGraphics(const TParam& aParam,

                          const TLineInfo& aLineInfo) const;

    /**

    * From MFormCustomDraw

    * See frmtlay.h for more information.

    */

    TRgb SystemColor(TUint aColorIndex,

                     TRgb aDefaultColor) const;

private:

    /**

    * C++ contructor

    */

    CMIDTextBoxEdwinCustomDraw(const MLafEnv& aEnv,

                               const MFormCustomDraw* aParentCustomDraw,

                               const CEikEdwin* aParentControl);

    /**

    * 2nd phase constructor

    */

    void ConstructL();

    /**

    * Draws editor lines

    * @param aParam, contains also reference on GraphicsContext

    * @param aDrawn a rectangle that needs to be drawn

    */

    void DrawEditorLines(const TParam& aParam, TRect& aDrawn) const;

    /**

     * Create the rectangles used for setting the shape of our window.

     * There is a rectanlge for each line. If the line number increases we

     * create new rectangles. This may happen when changing screen resolution.

     */

    void CreateRectsIfNeededL();

    /**

     * Get the layout used to position the horizontal graphic lines (grid)

     * @note Sets the delta between lines: iLineDelta

     *

     * @param aRect Edwin area without scrollbar

     * @param aLineTopOffset output the top margin of list_single_midp_pane,

     *  the offset of the first top graphic line

     * @return layout for horizontal graphic lines

     */

    TAknLayoutRect GetLayoutRectAndSetLineDelta(TRect& aRect,

            TUint8& aLineTopOffset);

public:

    /**

     * Update iIcon with actual skin.

     */

    void UpdateIconL();

private: // data

    // height of each line

    TInt iLineDelta;

    // icon for the line drawing

    CGulIcon* iIcon;

    // ref to the parent control (edwin)

    const CEikEdwin* iParentControl;

    // array of rectangles

    CArrayPtrFlat<TRect>* iRects;

    // number of lines in editor

    TUint iNumberOfLinesInBody;

    // ref on default implementation instance, we own it

    const MFormCustomDraw* iParentCustomDraw;

};

#endif // CMIDTEXTBOXEDWINCUSTOMDRAW_H

// End of File