QCustomPlot Discussion and Comments

After zoom out plot scrolls if...Return to overview
June 13, 2025, 17:12
by ATC

Stuck with QT5 so using latest QCustomplot for QT5

I have an issue, if I zoom in my plot with the mouse wheel and then zoom out with the mouse wheel
when I am fully zoomed out and additional mouse wheel "zoom out" will start scrolling the plot.

This started when I added a: y->setScaleRatio(x, 1.06); to the Y axis slot associated with the

SIGNAL(rangeChanged(QCPRange, QCPRange))

I did this because QCustomPlot changes the Y axis scale/ratio upon zoom which caused the Y axis
to compact after zooming in (on the next data update).

So I need to have the Y axis not change scale/ratio upon zooming AND I need the plot not to scroll
after zooming out with the mouse wheel. But they seem mutually exclusive.

Any advice would be greatly appreciated.

June 13, 2025, 17:52
by ATC

In addition...

Maybe scroll is the wrong term, the plot does not have a scroll bar. The data in the plot
just starts shifting up like I was scrolling...

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