I faced a bug that happen sometime in my program.
It is not occur everytime, but show up randomly.
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setCompositionMode: Painter not active
QPainter::end: Painter not active, aborted
Is anyone have any idea how to solve?
Thanks. According to the docs QPainter::begin returns True if successful, else False. Reasons for failure are the provided QPaintDevice is 0 (your problem), a provided paint image is null (None), or there is more than one painter.
I am confused about the type. The docs say type 3 is macOS's Quartz2D (CoreGraphics).
What did you use to get the Paint device (engine 0)? I think that is where you should be looking for the problem.
Getting a peek at the code would be interesting. Could you snip the part that is creating/initializing the argument that is passed to QPainter.begin(arg)? The error as show in figure in attachment.
They are not looking nice, but once I double click on those not complete display box, the value will come out.
Could you snip the part that is creating/initializing the argument that is passed to QPainter.begin(arg)?
I did not see anything related to Qpainter.begin, so I am not sure where to snip my code.
I suspect that, when I insert more Qlineedit boxes, this error will be more often.
Thanks. I use combobox to have more than one data.
When I switch from first to another, I did not do a proper reset, and cause error.
This is what I suspect so far, I am working on proper reset function and see whether problem solved or not.
Thanks.