qt5: use of QStylePainter on WSpinny is not supported

[RJ Skerry-Ryan]

In WSpinny, we use QStylePainter to try and paint the WSpinny with the CSS:

QStyleOption option;
option.initFrom(this);
QStylePainter p(this);
...
p.drawPrimitive(QStyle::PE_Widget, option);

Using Qt 5.5.1, the first render of a WSpinny prints:

QMacCGContext:: Unsupported painter devtype type 1

Reading this bug:
https://bugreports.qt.io/browse/QTBUG-32639
it seems this is not supported.

"The bottom line here is that Qt 5 does not support rendering QWidgets with the OpenGL2 paint engine,"

AFAIK we don't actually rely on styling of spinnies currently. Do we?

[RJ Skerry-Ryan (rryan)]

Qt 5.5.1
OS X 10.11.2

[Owen Williams (ywwg)]

are we doing something wrong that could be causing problems in 2.0?

[jus (jus)]

This is with latest master on MacBook Pro 2018 2,6 GHz Intel Core i7
macOS 10.14.2 (18C54)
QT 5.12.0

Constantly spammed to log as long as spinnies are enabled
``QMacCGContext:: Unsupported painter devtype type 1``

[Daniel Schürmann (daschuer)]

https://github.com/mixxxdj/mixxx/pull/1994

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/8419