QValueAxis::setTickInterval() has no effect

Stephan Lorenzen

Dear Forum,

I Have a QChart with some QLineSeries all attached to the same X and Y axis. However, the scaling of the axes is very weird; Qt always divides the complete range by four and sets that as tick interval. Since my range is some odd number, I end up with crooked tick intervals. I tried to set the tick interval myself; however, that had no effect.

My code is

QValueAxis *xAxis = new QValueAxis(this);
QValueAxis *yAxis = new QValueAxis(this);
xAxis->setRange(0, maxX());
yAxis->setRange(0, maxY());
addAxis(xAxis, Qt::AlignBottom);
addAxis(yAxis, Qt::AlignLeft);
xAxis->setTickInterval(unit(maxX(), NTICKS));
yAxis->setTickInterval(unit(maxY(), NTICKS));

The axis is still shown with crooked tick intervals. I expect that the axis shows tick intervals as I set them.

I am using Qt6.

Best

Stephan

Stephan Lorenzen

I found the answer myself, you have to specify dynamic ticks.

xAxis->setTickType(QValueAxis::TicksDynamic);
yAxis->setTickType(QValueAxis::TicksDynamic);

Now it works.