Adding qpaint object to a Layout

[Rooster]

You mean a QPainter?
You can't add a QPainter to anything. QPainter is used just to paint on paint devices.
If you want to create a graphical object to substitute the canvas, you can create a QWidget subclass and paint on it.

Yes, I mean QPainter. Sorry about that. Is creating a QWidget subclass the best way to go? What I am doing is I have three checkboxes that correspond to three different graphs. If two of the boxes are checked then two of the graphs are drawn. If all three boxes are checked then all three graphs are drawn. I decided to use QPainter instead of canvas because of issues with the scaling and drawing the lines in canvas was getting problematic. Could there be a better way of doing this than using QPainter?


Thanks