Qt点击QLabel控件触发CLICK事件

#ifndef MYLABEL_H
#define MYLABEL_H
#include <QLabel>
#include <QMessageBox>
#include <QMouseEvent>

class MyLabel:public QLabel
{
    Q_OBJECT
public:
    MyLabel(const QString & text,QWidget *parent=0);
    MyLabel(QWidget *parent=0);

signals:

public slots:

public:
    virtual bool event(QEvent *event) override;

};
#endif // MYLABEL_H

#include "mylabel.h"

MyLabel::MyLabel(const QString & text,QWidget *parent):QLabel(parent)
{
    setText(text);
}

MyLabel::MyLabel(QWidget *parent):QLabel(parent)
{

}

bool MyLabel::event(QEvent *e)
{
    if(e->type()==QEvent::MouseButtonPress)
    {
        QMouseEvent *mouseEvent=static_cast<QMouseEvent*>(e);
        if(mouseEvent->button()==Qt::LeftButton)
        {
            QMessageBox::information(NULL,"提示","点击QLabel控件弹出了我",QMessageBox::Yes|QMessageBox::No,QMessageBox::Yes);
            return true;
        }

    }
    return QLabel::event(e);
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "mylabel.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    MyLabel* label=new MyLabel("点我试试",this);
    label->setGeometry(20,20,30,30);

}

MainWindow::~MainWindow()
{
    delete ui;
}

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}