Convert canvas coordinates to parent widget

Hello everyone!

Currently, I am facing a problem that I have a certain point on my canvas and I also have a parent widget that incorporates the whole plot. What I need to do is to convert a point from a curve in my canvas to coordinates relative to my parent widget.

Does anybody know how I can do it?

I tried doing the following example, but was not successful:

auto points1 = plot_->canvas()->mapFromParent(pointsToConvert);
auto points2= plot_->mapFromParent(points1 );
auto points3 = mapFromParent(points2);

Thank you!

First you need to translate the curve points into widget coordinates of the canvas. This can be done using the maps you get with QwtPlot::canvasMap().

Uwe