qt5.7 区分鼠标单击双击事件

不解释了，渣渣写的代码很简答，大佬请指教

源文件

#include "widget.h"

#include "ui_widget.h"

int flag = 0;

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    timer= new QTimer(this);

    timer->setSingleShot(true);

    connect(timer,SIGNAL(timeout()),this,SLOT(click_choice()));

}

void Widget::click_choice()

{

    switch (flag) {

    case 1:

        click_single();

        flag =0;

        break;

    case 2:

        click_double();

        flag =0;

        break;

    default:

        break;

    }

}

void Widget::click_single()

{

    qDebug()<<"single click"< 
  
}
 
  
void Widget::click_double()
 
  
{
 
  
    qDebug()<<"double click"< 
  
}
 
  
 
 
  
Widget::~Widget()
 
  
{
 
  
    delete timer;//   这里不知道要delete不，如果有懂的大佬指点一下，谢谢 
    delete ui;
 
  
}
 
  
 
 
  
void Widget::on_pushButton_clicked()
 
  
{
 
  
    //qDebug()<<"this clicke"< 
  
    if(!timer->isActive())
 
  
   {
 
  
        timer->start(200);//
 
  
    }
 
  
        flag++;
 
  
    qDebug()<remainingTime()< 
  
}
 
  
 
 
  
源文件
 
  
#ifndef WIDGET_H
 
  
#define WIDGET_H
 
  
#include
 
  
#include
 
  
#include 
 
  
 
 
  
namespace Ui {
 
  
class Widget;
 
  
}
 
  
 
 
  
class Widget : public QWidget
 
  
{
 
  
    Q_OBJECT
 
  
 
 
  
public:
 
  
    explicit Widget(QWidget *parent = 0);
 
  
    ~Widget();
 
  
 
 
  
private slots:
 
  
    void on_pushButton_clicked();
 
  
    void click_single();
 
  
    void click_double();
 
  
    void click_choice();
 
  
private:
 
  
    Ui::Widget *ui;
 
  
    QTimer *timer;
 
  
};
 
  
 
 
  
#endif // WIDGET_H