#ifndef MYGRAPHICSSCENE_H
#define MYGRAPHICSSCENE_H

#include <QObject>
#include <QGraphicsScene>
#include <QVector>
#include <QPainter>
#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QPixmap>
#include <QPicture>
#include <QList>
#include <QtGui>
#include <QList>

#include "mygraphicsgriditem.h"
#include "machine/comm/datadef.h"
#include "datafile/dataoperat.h"
#include "main.h"

#define DRAWMARGINS 200.0 //item在场景中绘制时的边距(留边)

#define TYPE_DRAG       -1      //拖拽
#define TYPE_LINE       0       //直线
#define TYPE_ARC        1       //三点圆

struct GLineItem
{
    u16 order;//顺序
    WORD type;
    QGraphicsPolygonItem* item;
    QList<QPointF> points;
};

struct GPathItem
{
    u16 order;//顺序
    WORD type;
    QGraphicsPathItem* item;
    QList<QPointF> points;
};

struct SelectPoint
{
    int type;//选中点类型 0：起点  1：终点  2:中间点
    int idx;//图元索引
};

///
/// \brief The MyGraphicsScene class
///场景层 记录实际数据
///
class MyGraphicsScene: public QGraphicsScene
{
    Q_OBJECT
public:
    MyGraphicsScene();
    ~MyGraphicsScene();

protected:   
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
//    void drawBackground(QPainter *painter, const QRectF &rect);

private:
    QByteArray m_dispDat;
    MyGraphicsGridItem *m_grid;
    qreal m_radius = 0.5;
    QBrush m_selectedBrush;
    QBrush m_defaultBrush;
    QList<QGraphicsEllipseItem *> m_ellipseItemList;    //顶点圆圈的元素
    QList<GLineItem> m_lineItemList;          //直线元素
    QList<GPathItem> m_pathItemList;          //路径元素
    QPointF m_dragOffset;                   //拖拽点的坐标
    QGraphicsEllipseItem *m_draggingPoint;  //拖拽点的元素
    int m_ArcCount = 0; //圆弧记录坐标个数 个数在0-2之间
    int m_shapeType = TYPE_DRAG;
    bool m_isAdsorption = true;
    int m_maxSegmentLength = 20;
    int m_addOrder;//绘制图元时的绘制顺序

private:
    // 计算两点之间的中点
    QPointF midpoint(const QPointF &p1, const QPointF &p2);
    // 计算两点之间连线的斜率
    double slope(const QPointF &p1, const QPointF &p2);
    // 计算圆心
    bool findCircleCenter(const QPointF &p1, const QPointF &p2, const QPointF &p3, QPointF &center, double &radius);
    // 计算半径
    double findRadius(const QPointF &center, const QPointF &point);
    // 计算两点之间的距离平方
    double distanceSquared(QPointF p1, QPointF p2);

public:
    QList<QGraphicsEllipseItem *> getPointList();
    QList<GLineItem> getLineItemList();
    QList<GPathItem> getPathItemList();
    void addItemToScene(QByteArray ary);
    void addItemListToScene(QList<drawItem> list);
    void addGrid(double gridSpacing,QRectF rect);
    void cleanScene();
    bool getCurSelectState();
    bool initAPoint();
    void forwardAndBackward(int idx);
    void insertPoint(int dir);
    void removeSelectPoint();
    void setShapeType(int type);
    void setAdsorption(bool adsorption);
    void setLastPointSelected();
    void setMaxSegmentLength(int value);
    int getMaxSegmentLength();
    int getArcItem(QList<QPointF> points, QGraphicsPathItem* item, double threex[], double threey[]);
    int getGLineItem(QGraphicsEllipseItem* p,QPointF p1);
    int getGPathItem(QGraphicsEllipseItem*p,QPointF p1);
    void setXYMove(double valX,double valY);
    void revokeLastItem();//撤销最后一个图元

signals:
    void siCurrentIndex(int idx);

public slots:
};

#endif // MYGRAPHICSSCENE_H