鼠标事件

//mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
   
#include 
#include 
namespace Ui {
class MainWindow;
}
 
   
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
   
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    void mouseMoveEvent(QMouseEvent *e);
    void mousePressEvent(QMouseEvent *e);
 
   
 
   
private:
    Ui::MainWindow *ui;
};
 
   
#endif // MAINWINDOW_H
//mainwindow.cpp 
  
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}
 
   
MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::mouseMoveEvent(QMouseEvent *e){
    ui->label_now->setText(QString::number(e->x())+","+QString::number(e->y()));
}
void MainWindow::mousePressEvent(QMouseEvent *e){
    if(e->button()==Qt::LeftButton)
    ui->label->setText("左键"+QString::number(e->x())+","+QString::number(e->y()));
    if(e->button()==Qt::MidButton)
    ui->label->setText("中键"+QString::number(e->x())+","+QString::number(e->y()));
    if(e->button()==Qt::RightButton)
    ui->label->setText("右键"+QString::number(e->x())+","+QString::number(e->y()));
 
   
}
 
  

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