#ifndef TRANSPARENTDRAGGABLECRACKOBJECT_H
#define TRANSPARENTDRAGGABLECRACKOBJECT_H

#include <QObject>
#include "qmycustomplot.h"
#include <QList>

class TransparentDraggableCrackObject : public QObject
{
    Q_OBJECT
public:
    explicit TransparentDraggableCrackObject(QMyCustomPlot *parentPlot,
                                              const QString &strUuid = "",
                                              double depth = 0);
    ~TransparentDraggableCrackObject();

protected:
    bool eventFilter(QObject *obj, QEvent *event) override;

private:
    static QList<TransparentDraggableCrackObject*> s_allCurves; // 所有曲线实例
    static TransparentDraggableCrackObject* s_activeCurve;      // 当前活动曲线

    QMyCustomPlot *mPlot;
    QCPItemCurve *mCurve;
    double m_depth;
    double m_endX;

    double m_orig_x1, m_orig_x2;
    double m_orig_y1, m_orig_y2;
    double m_orig_startX, m_orig_endX;
    double m_orig_startDirX, m_orig_startDirY;
    double m_orig_endDirX, m_orig_endDirY;

    double m_offsetX;
    double m_offsetY;

    QCPItemTracer *m_tracer1;
    QCPItemTracer *m_tracer2;

    enum DragState { Idle, DraggingPoint1, DraggingPoint2, DraggingCurve };
    DragState m_dragState = Idle;
    QPointF m_lastDragPixel;

    void updateCurveFromTargets();
    void updateCurvePosition();
    void updateTracers();
    void setTracerHighlight(QCPItemTracer *tracer, bool highlight);
};

#endif