arrows.h

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// $Id: arrows.h 751 2006-03-31 15:43:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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=================================XARAHEADEREND============================
 */
// Defines ArrowRec class (a Line ArrowHead Record)

#ifndef INC_ARROW
#define INC_ARROW

#include "fixed16.h"
#include "doccoord.h"
#include "paths.h"

class Trans2DMatrix;

const INT32 DEFAULT_ARROW_LINEWIDTH = (72000/2);
const INT32 DEFAULT_ARROW_SIZE = 3;

/********************************************************************************************

< StockArrow

Comment:
    MonoOn
    enum StockArrow
    {
        SA_NULLARROW,
        SA_STRAIGHTARROW,
        SA_ANGLEDARROW,
        SA_ROUNDEDARROW,
        SA_SPOT,
        SA_DIAMOND,
        SA_ARROWFEATHER
        SA_ARROWFEATHER2,
        SA_HOLLOWDIAMOND
    };
    MonoOff
    
********************************************************************************************/

enum StockArrow
{
    SA_NULLARROW,
    SA_STRAIGHTARROW,
    SA_ANGLEDARROW,
    SA_ROUNDEDARROW,
    SA_SPOT,
    SA_DIAMOND,
    SA_ARROWFEATHER,
    SA_ARROWFEATHER2,
    SA_HOLLOWDIAMOND,

    NUM_STOCK_ARROWS
};

/********************************************************************************************

>   class ArrowRec : public CCObject

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/4/95
    Purpose:    A class defining a Line ArrowHead Record.

********************************************************************************************/

class ArrowRec : public CCObject
{
    CC_DECLARE_DYNCREATE(ArrowRec);

public:

// Construction
    ArrowRec();
    ArrowRec(Path* pArrowPath, const DocCoord& Centre, 
             INT32 LineWidth = DEFAULT_ARROW_LINEWIDTH, 
             FIXED16 WidthScale  = DEFAULT_ARROW_SIZE, 
             FIXED16 HeightScale = DEFAULT_ARROW_SIZE,
             BOOL Start = FALSE);

// Copy constructor
    ArrowRec(const ArrowRec&);

// Destruction
    ~ArrowRec();

//Initialisation
    BOOL CreateStockArrow(StockArrow);

    void SetArrowSize(FIXED16 Width, FIXED16 Height = 0);

// Copying and equality
    INT32 operator==(const ArrowRec&);
    ArrowRec& operator=(const ArrowRec&);

    INT32 operator==(StockArrow);
    ArrowRec& operator=(StockArrow);

// Arrow Data access
    Path*       GetArrowPath();
    DocCoord    GetArrowCentre();
    INT32       GetArrowLineWidth();
    FIXED16     GetArrowWidth();
    FIXED16     GetArrowHeight();

    BOOL        IsStartArrow();
    BOOL        ShouldScaleWithLineWidth();

    INT32       GetArrowID();

// Position and bounds calculations
    DocRect GetArrowBoundingRect(Path* pParent, INT32 LineWidth, BOOL StartArrow);

    BOOL GetArrowMatrix(const DocCoord& Centre, const DocCoord& Direction, 
                        INT32 LineWidth, Trans2DMatrix* pMatrix);

// Statics for getting arrow positions within paths
    static BOOL DoesPathNeedArrowHeads(DocCoord* Coords, PathVerb* Verbs, INT32 NumCoords);

    static BOOL GetFirstArrowPos(BOOL StartArrow,
                                 DocCoord* Coords, PathVerb* Verbs, INT32 NumCoords, 
                                 INT32* Index, DocCoord* Centre, DocCoord* Direction);

    static BOOL GetNextArrowPos(BOOL StartArrow,
                                DocCoord* Coords, PathVerb* Verbs, INT32 NumCoords, 
                                INT32* Index, DocCoord* Centre, DocCoord* Direction);

// Check for a dummy ArrowHead
    inline BOOL IsNullArrow() { return (ArrowShape == NULL || IsNull); }

// Number of Stock Arrows available
    static INT32 GetNumStockArrows() { return NUM_STOCK_ARROWS; }
    static String_256 GetStockArrowName(StockArrow);

// Angle calculation
    static ANGLE CalcAngle(const DocCoord& Centre, const DocCoord& Direction);

private:
    DocRect FindBoundsAt(const DocCoord& Centre, const DocCoord& Direction, INT32 LineWidth);

public:
    Path* ArrowShape;
    DocCoord Centre;
    INT32 LineWidth;
    FIXED16 ArrowWidth;
    FIXED16 ArrowHeight;

    BOOL StartArrow;
    BOOL ScaleWithLineWidth;
    INT32 ArrowID;

    // For backwards compatability
    BOOL IsNull;

    // gets the base of the arrow (in arrow coordinates i.e. before it's been transformed
    // by the matrix delivered in GetArrowMatrix)
    void GetArrowBase(DocCoord * pPoint);

    // flag to indicate that the arrow is outside of the path
    BOOL m_bExtendPath;
};

#endif  // INC_ARROW

---