what is the unit of measurement in height and width of Qwidget in Qt

Question

I want to plot in Qt using QCustomPlot. I draw a widget and promote it to QCustomPlot. Now I want to set height and width of the widget in millimeter. How can I do this action?

Answer 1

This is a hard one cause the actual on screen size of component is very platform dependent. Below you have two articles from Qt documentation about getting size of a widget and screen geometry for some specific platforms.

Screen geometry

Window geometry

Maybe You will find this usefull