graphicfunction.h

#ifndef GRAPHICFUNCTION_H
#define GRAPHICFUNCTION_H

#include <QPointF>
#include <string>
#include <stack>
#include <cmath>
#include <QDebug>
#include <QPainter>

#include "utils.h"
#include "parser.h"
#include "settings.h"
#include "QPolygon"
#include "scaleaxewidget.h"

class ScaleAxeWidget;


class GraphicFunction
{
public:
    GraphicFunction();

    struct BezierPoint
    {
        BezierPoint();
        BezierPoint(QPointF _cp1, QPointF _cp2, QPointF _point) :
            cp1{_cp1},
            cp2{_cp2},
            point{_point}
        {}
        QPointF cp1;
        QPointF cp2;
        QPointF point;
    };

    void draw(QPainter& painter);

    void scale(const double ratioX, const double ratioY);

    QColor getColor() const;
    void setColor(const QColor& value);

    QString getInputUserExpression() const;
    void setInputUserExpression(const QString value);
    void calculatePoints();

private:
    Parser expressionPolish;
    QString inputUserExpression;
    QVector<QPointF> points;
    //QStack<QPointF> points;
    double lastScaleRatioX{1};
    double lastScaleRatioY{1};
    double factorX;
    double factorY;
    QColor color{Qt::black};
    bool isPointInWindow(QPointF point);

    std::vector<BezierPoint> bezierPoints;
    void createBezierPoints();
};

#endif // GRAPHICFUNCTION_H