@psryan it's a member of the Context2d QML type. See the docs for that and Canvas.

Hi, @WLOrion said in Introduction in Qwt: I didn't know this behavior of the Qwt Classes. This is nothing Qwt specific, it's part of the C++ basics. As for tutorial, there's a nice online book that is in German but the author claims that online translator should give you a good enough result in your own language.

@CJha We agree when it's a little late. I tried without changing your code. Output was 52 milliseconds. Maybe not a contribution, but the difference is not 1/10. QChart seems to do what you want. Windows 10 x64, Qt 6.1, MinGW 64 and AMD Ryzen 7 PRO 4750U 8Gb RAM.

Hi It would be very easy to draw manually using QML or QPainter but do you need zooming and other features QChart provides ?

@Yash001 Hi, i wish i knew the answer but im fairly sure canvas()->width(); just returns the actual widget size and not the zoomed area as such. Had a look in the help but didnt find the answer on how to get the extent on a zoomed canvas.

Thanks for the support guys. I tried making a transparent QPixmap image using Qt::transparent fill for the axis and overlaying it onto my other QPixmap, however it didn't work properly. So I ended up just drawing directly onto the image itself. Not the most efficient method but it seems to work...

@aha_1980 Thank you alot Sir your answer was correct and helped to clean up the problem! Regards

Thank you for your answer! I've yet to find a good introduction into QML for C++ developers, but I was a little put off by the somewhat convoluted approach as different tutorials either don't show any QML or only use it soley to develop a very simple application. The main problem I'm struggling is with QML is the ability to generate a GUI based on some set preferences. In my case the amount of e.g tabs in the "Options" pane should be defined by the amount of video files which are currently loaded. Is this easily possible to programatically extend QML GUIs?

I suggest looking into QCustomPlot.