Multiple Axes

genli

I would like to add to my graph two axes x and y which go through 0 I have tried this code but it does not display the desired result

                          QSplineSeries *series1 = new QSplineSeries;
                          *series1 << QPointF(0, 0);
                          chart->addSeries(series1);

QValueAxis *axisX = new QCategoryAxis;
QValueAxis *axisY = new QCategoryAxis;
axisY->setLinePenColor(series1->pen().color());
axisX->setLinePenColor(series1->pen().color());
chart->addAxis(axisY, Qt::AlignLeft);
chart->addAxis(axisX, Qt::AlignLeft);
series1->attachAxis(axisX);
series1->attachAxis(axisY);