#pragma once
#include <qgraphicsview.h>
#include <qevent.h>

class CameraItemView :
    public QGraphicsView
{
    Q_OBJECT;
public:
    //define a constructor
    CameraItemView(QWidget* parent = nullptr);
    //define a destructor
    ~CameraItemView();

    //define a function to achieve the mouse press event
    void mousePressEvent(QMouseEvent* event);
    //define a function to achieve the mouse release event
    void mouseReleaseEvent(QMouseEvent* event);
    //define a function to achieve the mouse move event
    void mouseMoveEvent(QMouseEvent* event);
    //define a function to achieve the mouse wheel event
    void wheelEvent(QWheelEvent* event);

public:
    //define a Point to record the View Center Point
    //QPointF m_ViewCenterPoint;
    //define two float to record the View Scale
    float m_fViewScaleX;
    float m_fViewScaleY;

    //define a bool to indicate the mouse is pressed or not
    bool m_bMousePressed;
    //define a Point to record the mouse press point
    QPointF m_MousePressPoint;
    //define a Point to record the mouse move current point
    QPointF m_MouseMoveCurrentPoint;

    //define a point to record the view center point
    QPointF m_ViewCenterPoint;

};