Dev: QML and QWidget

[bansan85]

Dear,

In my personal project, I would like to insert a QWidget in a QML window. I know that the Timeline in MuseScore is a QWidget.

I followed instruction from https://github.com/edelhirsch/widgetitem and https://www.qtdesktopdays.com/how-to-breathe-new-qml-life-into-a-qwidget-based-app-from-2000s . But I have error "Cannot send events to objects owned by a different thread" because the QWidget is created by the main thread and the QML renderer is launch in another thread.

I read the code from class mu::notation::TimelineView and it looks like you do exactly the same that in previous examples. But if a put a breakpoint in mu::uicomponents::paint, the current thread is the main thread:

In widgetitem project, the paint function is launched from another thread:

My question is : how did you do to launch the paint function from the main thread ??

I found that adding qputenv("QT_QUICK_BACKEND", "software"); fix the problem but it's not a good solution.

Thanks,