#ifndef ROICIRCULARARC_H
#define ROICIRCULARARC_H
#include "showunit_global.h"
#include "HalconCpp.h"
#include "ROI.h"
#include<QObject>
#include <QString>
#include <QDataStream>
using namespace HalconCpp;
class ROI;
class SHOWUNITSHARED_EXPORT ROICircularArc:public ROI
{
    Q_OBJECT
    public:
        ROICircularArc();
        void createROI(double midX, double midY) override;
        void drawROI(HTuple winID, double scaleFactor)  override;
        double distToClosestHandle(double x, double y) override;
        void displayActive(HTuple winID, double scaleFactor) override;
        void moveByHandle(double newX, double newY) override;
        QCursor showByHandle() override;
        HRegion getRegion() override;
        HTuple getROIData() override;
        void setROIData(HTuple) override;
        void save(QDataStream &dataStream) override;
        void load(QDataStream &dataStream)override;
    private:
        double midR, midC;       // 0. handle: midpoint
        double sizeR, sizeC;     // 1. handle
        double startR, startC;   // 2. handle
        double extentR, extentC; // 3. handle

        //model data to specify the arc
        double radius;
        double startPhi, extentPhi; // -2*PI <= x <= 2*PI


        double    TwoPI;
        QString  circDir;
        //display attributes
        HXLDCont  contour;
        HXLDCont  arrowHandleXLD;
        HXLDCont startRect2XLD;


        void  determineArcHandles();
        void  updateArrowHandle();
        void updateStartRect2XLDHandle(int WindowsWidth);
        void setStartHandle();
        void  setExtentHandle();

    #ifndef QT_NO_DATASTREAM
        friend QDataStream& operator>>(QDataStream &in, ROICircularArc& data);
        friend QDataStream& operator<<(QDataStream &out, ROICircularArc& data);
    #endif
};

#endif // ROICIRCULARARC_H