鼠标响应事件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMouseEvent>
#include <QWheelEvent>

class MainWindow : public QMainWindow
{
    Q_OBJECT
    
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void mousePressEvent(QMouseEvent *event);//点击
    //void mouseMoveEvent(QMouseEvent *event);//移动
    //void mouseReleaseEvent(QMouseEvent *event);//释放
    //void mouseDoubleClickEvent(QMouseEvent *event);//双击
    //void wheelEvent(QWheelEvent *event);//滚动

private:
    QPoint offset;//存储鼠标位置与窗口位置的差值
    QCursor cursor;//创建光标，保存光标的默认形状
};

#endif // MAINWINDOW_H

//鼠标触发事件

#include "mainwindow.h"
#include <QMouseEvent>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    //mousePressEvent(QMouseEvent *event);
    //mouseDoubleClickEvent();
    //mouseMoveEvent();
    //mouseReleaseEvent();
    //wheelEvent();
}

MainWindow::~MainWindow()
{
    
}
//左右键点击事件，打印消息
void MainWindow::mousePressEvent(QMouseEvent *event)
{
    if(event->buttons()==Qt::LeftButton)
    {
        //cursor = new QCursor;
        qDebug()<<"LeftButton clicked!";
    }
    else if(event->button()==Qt::RightButton)
        qDebug()<<"RightButton clicked!";
}
/*void MainWindow::mouseMoveEvent(QMouseEvent *event)
{

}
void MainWindow::mouseDoubleClickEvent(QMouseEvent *event)
{
    if(event->button()==)
}*/