TrendLineObject.h

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//====================================================================
//  Filename:       Kernel/SourceCode/IPhoneChart/PrivateSource/TrendLineObject.h
//  Date:           2008-11-04
//  Authors:        Bing Huang

//  Copyright (C) 1997-2008 MicroStrategy Incorporated
//  All rights reserved
//====================================================================

#ifndef MsiChart_TrendLineObject_h
#define MsiChart_TrendLineObject_h

#include "GraphObject.h"
#include "TextObject.h"
#include "CurveLineObject.h"

namespace MsiChart
{
    //extern variable
    extern const Int32 gMaxTrendLineTextLength;

    //pre-declaration
    class CategoryPlot;
    class Axis;
    
    struct GraphTrendLineOptions;
    
    class TrendLineObject : public GraphObject
    {
    public:
        typedef MSynch::SmartPtr<TrendLineObject> Ptr;

        TrendLineObject(const TripleId& irTripleId, EnumDSSGraphObject iRealObjectId, GraphObjectManager* ipManager, GraphCollectionObject* ipParentObject, 
            Axis* ipXAxis, Axis* ipYAxis,
            GraphTrendLineOptions* ipTrendLineOptions, const Rect2D& irDataArea, bool iIsVertical, 
            const Point2D& irDepthOffset);

        //virtual functions from GraphObject
        virtual void Draw() const;
        virtual void DrawOutLine();
        virtual bool PointInObject(const Point2D& irPoint);
        virtual void GenerateImageMap(ImageMap& iorImageMap);
        virtual bool ObjectInRectangle(const Rect2D& irRect);
                
        virtual void SetData(const std::vector<double>& irX, const std::vector<double>& irY);

        const EnumDSSGraphObject GetRealObjectId() const;

        TextObject::Ptr GetEquationText();

    protected:
        virtual bool ComputeEquation(const std::vector<double>& irX, const std::vector<double>& irY) = 0;
        
        virtual void ComputeR(const std::vector<double>& irX, const std::vector<double>& irY) = 0;

        virtual void GetEquationString(wchar_t* iorString) = 0;

        virtual double GetY(double iX) const = 0;

        virtual double GetSlope(double iX) const = 0;

        virtual void CreateEquationText();
        
        virtual void CreateCurveLine();

        void CreatePolarCurveLine();

        bool IsPolarTrendLine() const;

        void GaussElimination(std::vector<double>& irA, std::vector<double>& iorXY, const Int32 iSize);

        bool IsAxisY2();

        BezierCurve::Ptr CreateBezierCurve(double iStartXLogical, double iEndXLogical) const;

        virtual void GetClockwisePolygon(std::vector<Point2D>& orPolygon) const;

        bool IsZero(double& irValue) const;

        bool IsInBoundary(double& irNumber) const;

        void AddToLogarithmAxisCurve(double iStartXLogical, double iEndXLogical, double iStep);

        void AddToPolarCurve(double iStartXLogical, double iEndXLogical, double iStep);

        //member variables
        Axis* mpXAxis;
        Axis* mpYAxis;
        GraphTrendLineOptions* mpTrendLineOptions;
        Rect2D mDataArea;
        Point2D mDepthOffset;
        bool mIsVertical;
        TextObject::Ptr mTextPtr;
        EnumDSSGraphObject mRealObjectId;
        CurveLineObject::Ptr mCurveLinePtr;
        double mMinXLogical;
        double mMaxXLogical;
        double mMinYLogical;
        double mMaxYLogical;        

    };

    inline const EnumDSSGraphObject TrendLineObject::GetRealObjectId() const
    {
        return mRealObjectId;
    }
}

#endif