3500/MyCustomGraphicsItem.h

#ifndef MYCUSTOMGRAPHICSITEM_H
#define MYCUSTOMGRAPHICSITEM_H

#include <QObject>
#include <QWidget>
#include <QMouseEvent>
#include <QGraphicsScene>
#include <QGraphicsRectItem>
#include <QGraphicsSceneMouseEvent>
#include <QRect>
#include <QPainter>
#include <QPolygon>
#include <QList>
#include <QTransform>


class CMyCustomGraphicsItem : public QObject , public QGraphicsItemGroup
{
    Q_OBJECT
public:
    explicit CMyCustomGraphicsItem(QObject *parent = nullptr);

//    void mousePressEvent(QGraphicsSceneMouseEvent *event);
//    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
//    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
    void wheelEvent(QGraphicsSceneWheelEvent *event);
signals:
    void doubleclick(QGraphicsSceneMouseEvent *event);
public slots:
};
class LineItem : public QGraphicsItem
{
public:
    LineItem();

    //最大显示范围的设置默认为30
    float maxX();
    void setMaxX(float value);
public:
    QRectF boundingRect() const;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
private:
    //显示范围
    float m_maxX;
};

#endif // MYCUSTOMGRAPHICSITEM_H