#include <QtGui>

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    QVector<qreal> dashes;
    dashes << 3 << 3;
    QPen pen;
    pen.setColor( QColor(0, 0, 255) );
    pen.setWidth(1.0);
    pen.setCapStyle(Qt::FlatCap);
    pen.setStyle(Qt::SolidLine);
    pen.setDashPattern(dashes);
    QPainterPath path;
    path.moveTo(-24, 0);
    path.lineTo ( 0, 24);
    path.lineTo (24, 0);
    path.lineTo (0, -24);
    path.closeSubpath();
    QPixmap p(200, 200);
    p.fill(Qt::white);
    QPainter painter(&p);
    painter.translate(100, 100);
    painter.setPen(pen);
    painter.drawPath(path);
    painter.end();
    p.save("test.png", "PNG");
    return 0;
}