handprint_identification_reports/mylabel.h

#ifndef MYLABEL_H
#define MYLABEL_H

#include <QObject>
#include <QLabel>
class MyLabel : public QLabel
{
    Q_OBJECT
public:
    explicit MyLabel(QWidget *parent = 0);

protected:
    void contextMenuEvent(QContextMenuEvent *event) override;   //右键菜单
    void paintEvent(QPaintEvent *event);                        //QPaint画图
    void wheelEvent(QWheelEvent *event) override;               //鼠标滚轮滚动
    void mousePressEvent(QMouseEvent *event) override;          //鼠标摁下
    void mouseMoveEvent(QMouseEvent *event) override;           //鼠标松开
    void mouseReleaseEvent(QMouseEvent *event) override;        //鼠标发射事件

private slots:
    void OnSelectImage();       //选择打开图片
    void OnZoomInImage();       //图片放大
    void OnZoomOutImage();      //图片缩小
    void OnPresetImage();       //图片还原

private:
    QImage Image;           //显示的图片
    qreal ZoomValue = 1.0;  //鼠标缩放值
    int XPtInterval = 0;    //平移X轴的值
    int YPtInterval = 0;    //平移Y轴的值
    QPoint OldPos;          //旧的鼠标位置
    bool Pressed = false;   //鼠标是否被摁压
    QString LocalFileName;  //图片名
};


#endif // MYLABEL_H