Can anyone suggest a suitable analogue of QCustomPlot?

Question

Qt

In principle, the original suits me with everything, except for the license (gpl). Maybe someone knows a similar solution with a freer license? Except Qwt.

Answer 1

The main page of QCustomPlot says that there is a GPL and a commercial license.
Qt has the same license, if you buy Qt, it's cheaper to use QChartView or write your own. This is now the standard approach. GPL-licensed software can be sold, along with the source code, or purchased as a commercial license.
Formally, not everything can be included in the source code, but only what uses other people's libraries, and not include your libraries in pure C ++, i.e. It will not be possible to assemble the software, and really understand how it works. There is nothing terrible in this, for example, it is generally not possible to hide the source codes of programs in Phyton, or JavaScript or HTML.
On the defense industry, they reach the point that they rewrite the standard C ++ libraries