#include <QApplication>
#include <QPushButton>
#include <QPrinter>
#include <QPrintDialog>
#include <QDialog>
#include <QPainter>
#include <QElapsedTimer>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);


    QPrinter printer;

    QPrintDialog dialog(&printer, nullptr);
    dialog.setWindowTitle("Print Document");
    if (dialog.exec() != QDialog::Accepted) {
        return 0;
    }


    QPainter dc;
    dc.begin(&printer);
    dc.setClipRect(0,0,printer.width(),printer.height());

    QElapsedTimer timer;
    timer.start();

    const int numItems = 50 * 1000;
    const int arcSize = 20;
    for (int i = 0; i < numItems; ++i)
        dc.drawArc((qrand() % 2000), (qrand() % 2000), arcSize, arcSize, -90*16, 180*16);
    dc.end();

    QString elapsedTime("Elapsed time: ");
    elapsedTime += QString::number(timer.elapsed());

    QPushButton printButton(elapsedTime, nullptr);
    printButton.connect(&printButton, SIGNAL(pressed()), &printButton, SLOT(close()));
    printButton.show();


    return a.exec();
}