QTimer esimerkki

#include "dialog.h"
#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent): QDialog(parent), ui(new Ui::Dialog)
{
    ui->setupUi(this);
    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(update()));
    timer->start(1000);
    Arvo=0;
}

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

void Dialog::update()
{
   Arvo++;
   ui->dial->setValue(Arvo);
}

#ifndef DIALOG_H
#define DIALOG_H
#include <QtGui/QDialog>
#include <QTimer>

namespace Ui
{
    class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT
public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
private slots:
    void update();
private:
    Ui::Dialog *ui;
    QTimer *timer;
    int Arvo;
};



#endif // DIALOG_H