Qt::QObject类的定时器

dialog.h:

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

#include<QObject>

#include<QTimerEvent>

namespace Ui {

class Dialog;

}

class Dialog : public QDialog

{

    Q_OBJECT

public:

    explicit Dialog(QWidget *parent = 0);

    ~Dialog();

protected:

    void timerEvent(QTimerEvent *);

    int m_nTimerid;

    int count;

private slots:

    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

private:

    Ui::Dialog *ui;

};

#endif // DIALOG_H

 

 

dialog.cpp:

#include "dialog.h"

#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::Dialog)

{

    ui->setupUi(this);

    count=0;

}

Dialog::~Dialog()

{

    delete ui;

}

void Dialog::timerEvent(QTimerEvent *)

{

    count++;

    QString item=tr("第")+QString::number(count)+tr("秒");

    ui->listWidget->addItem(item);

}

void Dialog::on_pushButton_clicked()

{

m_nTimerid=this->startTimer(1000);

}

void Dialog::on_pushButton_2_clicked()

{

this->killTimer(m_nTimerid);

}