QtCurvesCpp/renderarea.h

#ifndef RENDERAREA_H
#define RENDERAREA_H

#include <QWidget>
#include <QPen>

class RenderArea : public QWidget
{
		Q_OBJECT
	public:
		explicit RenderArea(QWidget *parent = nullptr);

		QSize minimumSizeHint() const Q_DECL_OVERRIDE;
		QSize sizeHint() const Q_DECL_OVERRIDE;

		enum ShapesType{
			Astroid,
			Cycloid,
			HuygensCycloid,
			HypoCycloid,
			Line,
			Circle,
			Ellipse,
			Fancy,
			Starfish
		};

		void setBackgroundColor(QColor color) { mBackgroundColour = color; }
		QColor backgroundColor() const { return mBackgroundColour; }

		void setShapeColor(QColor color) { mPen.setColor(color); }
		QColor shapeColor() const { return mPen.color(); }

		void setShape(ShapesType shape) { mShape = shape; OnShapeChanged(); }
		ShapesType shape() const { return mShape; }

		void setInternalLenght(double l){mIntervalLenght=l;repaint();}
		double intervalLenght() const {return mIntervalLenght;}

		void setScale(double s){mScale=s;repaint();}
		double scale() const {return mScale;}

		void setStepCount(int s){mStepCount=s;repaint();}
		int stepCount() const {return mStepCount;}

	signals:

	protected:
		void paintEvent(QPaintEvent* event) Q_DECL_OVERRIDE;

	public slots:

	private:
		void OnShapeChanged();
		QPointF Compute(double t);
		QPointF ComputeAstroid(double t);
		QPointF ComputeCycloid(double t);
		QPointF ComputeHuygens(double t);
		QPointF ComputeHypo(double t);
		QPointF ComputeLine(double t);
		QPointF ComputeCircle(double t);
		QPointF ComputeEllipse(double t);
		QPointF ComputeFancy(double t);
		QPointF ComputeStarfish(double t);
		QColor mBackgroundColour;
		ShapesType mShape;
		QPen mPen;
		double mScale,mIntervalLenght;
		int mStepCount;
};
#endif // RENDERAREA_H