nodershp.h

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// $Id: nodershp.h 1776 2007-06-27 11:16:49Z luke $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

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

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Xara LX is free software; you can redistribute it and/or modify it
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-----------------

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The additional rights are to use, modify, and distribute the software
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      Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK.
                        http://www.xara.com/

=================================XARAHEADEREND============================
 */

/*
*/


#ifndef INC_NODEREGSHAPE
#define INC_NODEREGSHAPE

//#include "doccoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "docrect.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "ink.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "paths.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "trans2d.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "pathshap.h" //For the PathShape typedef enum - in camtypes.h [AUTOMATICALLY REMOVED]

const UINT32 REGULARSHAPE_MINSIDES = 3;
const UINT32 REGULARSHAPE_MAXSIDES = 99;

const double QUICKSHAPE_RADIUS_TOLERANCE=100.0;
const double QUICKSHAPE_ANGLE_TOLERANCE=0.02;   //Approximately one degree (remember that 2 PI radians = approx 6 radians = 360 degrees)
const INT32 QUICKSHAPE_SCALARPRODUCT_TOLERANCE=1000;    //The square of the radius tolerance

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

< ShapeClickEffect

    Comment:    Used to indicate 'areas of excitment' within a regular shape.  If nothing
                excites the shape then SHAPE_CLICK_NONE is used.

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

enum ShapeClickEffect { SHAPECLICK_NONE, SHAPECLICK_EDGE1,  SHAPECLICK_EDGE2, SHAPECLICK_CURVECHORD,
                        SHAPECLICK_CENTRE, SHAPECLICK_ELLIPSE, SHAPECLICK_RECTANGLE, SHAPECLICK_PRIMARY,
                        SHAPECLICK_STELLATION, SHAPECLICK_PRIMARYCURVE, SHAPECLICK_STELLATIONCURVE };


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

>   class NodeRegularShape : public NodeSimpleShape

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/11/94
    Purpose:    A NodeRegularShape represents an regularly shaped object.  It encompasses
                NodeSimpleShape (but is not derived from it as it needs to do more things)

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

class NodeRegularShape : public NodeRenderableInk
{
// Give my name out in memory dumps
CC_DECLARE_DYNCREATE(NodeRegularShape);

// friend classes used to import and export regular shapes to and from the new file format.
// friend class CXaraFileRegularShape;
// friend class RegularShapeRecordHandler;
// friend class EllipseRecordHandler;
// friend class RectangleRecordHandler;
// friend class PolygonRecordHandler;

public:
    NodeRegularShape(); 
    ~NodeRegularShape(); 
    
    NodeRegularShape(Node* ContextNode,  
                AttachNodeDirection Direction,  
                BOOL Locked = FALSE, 
                BOOL Mangled = FALSE,  
                BOOL Marked = FALSE, 
                BOOL Selected = FALSE    
              );

    // Initialise the shape
    BOOL SetUpShape();
    virtual Node* SimpleCopy();
    void CopyNodeContents(NodeRegularShape* NodeCopy);
    virtual void PolyCopyNodeContents(NodeRenderable* pNodeCopy);

    // virtual Functions to deal with bounding boxes
    virtual DocRect GetBoundingRect(BOOL DontUseAttrs=FALSE, BOOL HitTest=FALSE);
    virtual DocRect GetBlobBoundingRect();

    // Rendering Functions
    BOOL BuildShapePath(Path** RenderPath);
    virtual void Render( RenderRegion* pRender );
    virtual void RenderEorDrag( RenderRegion* );
    virtual void PreExportRender( RenderRegion* pRender ); 
    virtual BOOL ExportRender( RenderRegion* pRender ); 

    // Selection functions.
    virtual void RenderObjectBlobs(RenderRegion* pRender);
    virtual void RenderTinyBlobs(RenderRegion* pRender);

    // Functions to transform the shape
    virtual void Transform( TransformBase& );
    virtual void TransformCentreAndAxes( TransformBase& );

    // Information functions
    virtual UINT32 GetNodeSize() const;             // Returns size of node in bytes
    virtual String Describe(BOOL Plural, BOOL Verbose);
    ShapeClickEffect DetermineClickEffect(DocCoord* PointerPos, Spread* pSpread, INT32* pPointNum, DocCoord* pStart = NULL, DocCoord* pEnd = NULL);
 
    // Make Shapes functions
    virtual BOOL CanBecomeA(BecomeA* pBecomeA);
    virtual BOOL DoBecomeA(BecomeA* pBecomeA);

    // check to see if we have a variable width stroke applied to us, and get the real path
    virtual NodePath* GetVariableWidthStrokePath();
    virtual NodePath* GetSmoothVariableWidthStrokePath();

    // Debugging function
    #ifdef _DEBUG
        void    ShowDebugTreeDetails() const;
    #endif
    void GetDebugDetails( StringBase* Str );

    // Functions to deal with messages
    virtual BOOL OnClick( DocCoord, ClickType, ClickModifiers, Spread*);
    BOOL OnToolClick( DocCoord, ClickType, ClickModifiers, Spread*);
    virtual BOOL OnNodePopUp(Spread* pSpread, DocCoord PointerPos, ContextMenu* pMenu);

    // The natty Snap functions
    virtual BOOL Snap(DocCoord* pDocCoord);
    virtual BOOL Snap(DocRect* pDocRect,const DocCoord& PrevCoord,const DocCoord& CurCoord);
    virtual BOOL SnapToCoords(DocCoord* pDocCoord);

    virtual BOOL IsARegularShape() const;
    virtual double GetRotationAngle();

    // Various helper functions
public:
    void PositionPointFromRatio(DocCoord* PosPoint, const DocCoord* EndPoint, const double Ratio);
    BOOL BuildPolygonPoints(DocCoord** pArray, INT32* NumPoints = NULL);

    BOOL MakeRectangle(const INT32 Width, const INT32 Height, const INT32 CurvatureRadius);
    BOOL MakeEllipse(const INT32 Width, const INT32 Height);

    // Curvature building functions
    double GetMajorRadiusSize();

protected:
    void DeleteCachedPath();
    void InitialiseMemberVars();

private:
    BOOL MakeRegular(DocCoord RegularPoint);
    BOOL MakeStraight(BOOL StraightenOne);
    BOOL ToggleCurvature();
    BOOL InsertShapeEdge(Path* RenderPath, Path* Edge, DocCoord NewEnd);
    BOOL BuildEllipsePath(Path* RenderPath);
    BOOL BuildPolygonPath(Path* RenderPath, DocCoord* PointsArray);    
    BOOL SmoothCurvatureJoin(Path* RenderPath, DocCoord* Coords, INT32 Index, BOOL MoveLeft); 
    void EmergencyFixShape();

    BOOL ClickEllipse(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread, BOOL DragCentre); 
    BOOL ClickCentre(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread); 
    BOOL ClickPrimary(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread, BOOL DragCentre); 
    BOOL ClickStellation(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread); 
    BOOL ClickPCurve(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread, DocCoord Start, DocCoord End); 
    BOOL ClickSCurve(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread, DocCoord Start, DocCoord End); 
    BOOL ClickEdge(DocCoord PointerPos, ClickType Click, ClickModifiers ClickMods, Spread* pSpread, BOOL EdgeOne); 

public:
    // Access functions
    UINT32  GetNumSides() const;
    void    SetNumSides(UINT32 NewNumSides);
    BOOL    IsCircular() const;
    void    SetCircular(BOOL Value);
    BOOL    IsStellated() const;
    void    SetStellated(BOOL Value);
    BOOL    IsPrimaryCurvature() const;
    void    SetPrimaryCurvature(BOOL Value); 
    BOOL    IsStellationCurvature() const;
    void    SetStellationCurvature(BOOL Value);
    double  GetStellRadiusToPrimary() const;
    void    SetStellRadiusToPrimary(double Value);
    double  GetPrimaryCurveToPrimary() const;
    void    SetPrimaryCurveToPrimary(double Value);
    double  GetStellCurveToStell() const;
    void    SetStellCurveToStell(double Value);
    double  GetStellationRatio() const;
    void    SetStellationRatio(double Value);
    void    SetCentrePoint(DocCoord Value);
    void    SetMinorAxes(DocCoord Value);
    void    SetMajorAxes(DocCoord Value);
    DocCoord GetCentrePoint();
    DocCoord GetMajorAxes();
    DocCoord GetMinorAxes();
    DocCoord GetUTCentrePoint() const   {return UTCentrePoint;};
    DocCoord GetUTMajorAxes() const     {return UTMajorAxes;};
    DocCoord GetUTMinorAxes() const     {return UTMinorAxes;};
    void    GetTransformMatrix(Matrix* store) const;
    void    SetTransformMatrix(const Matrix* newmatrix);

    BOOL IsARectangle() const;
    
    INT32 GetRectWidth();
    INT32 GetRectHeight();

    inline void InvalidateCache()                   {PathCacheInvalid = TRUE;};
    BOOL IsReformed();

    // Data vars
public:
    // The paths are public to allow people to party all over them easily.
    Path    EdgePath1;          // First edge path from primary point to stellation point
    Path    EdgePath2;          // Second edge path from stellation point to primary point (not uses if not stellated)

protected:
    UINT32  NumSides;           // Number of sides the shape has (gives primary angle) (unused if IsCircular)
    BOOL    Circular : 1;       // TRUE if the shape is based on a circle
    BOOL    Stellated : 1;      // TRUE if the shape is stellated.
    BOOL    PrimaryCurvature : 1;       // TRUE if there is primary curvature
    BOOL    StellationCurvature : 1;    // TRUE if there is stellation curvature
    double  StellRadiusToPrimary;   // Ratio of stellation radius to primary radius (unused if not stellated)
    double  PrimaryCurveToPrimary;  // Ratio of primary curvature radius to primary radius (unused if none)
    double  StellCurveToStell;      // Ratio of stellation curvature radius to stellation radius (unused if none)
    double  StellOffsetRatio;       // The ratio of the stellation offset (+-0.5 = 360/NumSides)

    // These values could be calculated on the fly, but are cached for speed
    DocCoord    UTCentrePoint;      // Centre point of the shape
    DocCoord    UTMajorAxes;        // Major axes from centre to the bounding ellipse
    DocCoord    UTMinorAxes;        // Minor axes from centre to the bounding ellipse
    Path*   CachedRenderPath;
    BOOL    PathCacheInvalid : 1;
    Matrix  TransformMatrix;

// Version 2 file format functions
public:
    virtual BOOL WritePreChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WritePreChildrenNative(BaseCamelotFilter* pFilter);

    //PathShape functions (Graham 29/4/97)
public:
    PathShape GetPathShape();

    BOOL IsRotated();
    BOOL AxesAreEqual();
    BOOL AxesArePerpendicular();

    virtual INT32 EstimateNodeComplexity (OpParam* details);

    // Karim MacDonald 25/11/1999
    // Extend functions.
    // Note that if a sub-class returns TRUE from IsTypeExtendible, it must
    // also provide complete implementations of ValidateExtend and Extend,
    // which should usually check/extend its children.
public:
    virtual BOOL IsTypeExtendible() const { return TRUE; }
    virtual DocRect ValidateExtend(const ExtendParams& ExtParams);
    virtual void Extend(const ExtendParams& ExtParams);
};


#endif  // NODEREGSHAPE

---