#include <QtGui>

class ArcTest : public QWidget
{
    Q_OBJECT
public:
    ArcTest()
    {
        setFixedSize(200, 200);
    }

    void paintEvent(QPaintEvent*)
    {
        QPainter p(this);

        p.fillRect(rect(), Qt::white);

        QPainterPath path;

        path.arcMoveTo(99, 99, 2, 2, 0);
        path.arcTo(99, 99, 2, 2, 0, 360);

        QPen pen(Qt::black);
        pen.setWidth(185);

        p.strokePath(path, pen);
    }
};

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    ArcTest at;
    at.show();
    return app.exec();
}

#include "test.moc"