Spline Chart

[IknowQT]

QChart* QTemperatureChart::createSplineChart()
{
	m_pChart = new QChart();
	m_pChart->setTitle("Spline chart");

	// The lower series initialized to zero values
	QString name("Series ");
	int nameIndex = 0;

	m_pSplineSeries = new QSplineSeries(m_pChart);
	
	m_pChart->addSeries(m_pSplineSeries);

	m_pChart->addAxis(m_valueAxisX = new QValueAxis(), Qt::AlignBottom);
	m_pChart->addAxis(m_valueAxisY = new QValueAxis(), Qt::AlignLeft);

	m_pSplineSeries->attachAxis(m_valueAxisX);
	m_pSplineSeries->attachAxis(m_valueAxisY);

	m_valueAxisX->setTickCount(7);
	m_valueAxisX->setRange(0, 6);
	m_valueAxisY->setRange(0, 100);

	//m_pChart->createDefaultAxes();
	//m_pChart->axes(Qt::Vertical).first()->setRange(0, 10);

	return m_pChart;
}

void QTemperatureChart::UpdateChart(QPointF point)
{
	int randomx = QRandomGenerator::global()->bounded(0, 100);
	int randomy = QRandomGenerator::global()->bounded(0, 100);

	
	m_pSplineSeries->append(m_pSplineSeries->count(), randomy);
	m_pChart->scroll(10, 0);
}

I want to increase the x-axis by one on the chart, but it's increasing by 0.1.
And I want to fix the graph in the middle, so I think I can use Scroll.
But it doesn't work.