qDockWidget not painting after moving - UpdateLayeredWindowIndirect failed

gde23

When dragging and dropping a qDockWidget to a new location i get
following warning

UpdateLayeredWindowIndirect failed for ptDst=(792, 134), size=(278x525),
dirty=(278x525 792, 134) (Falscher Parameter.)

After that the widget is not painted anymore and the frame stays
completely white.

Platform is Windows7 64bit with Qt5.8.0

The same source on a different machine ( Debian Strech Qt5.7.1 ) works without any warnings and the drag and drop of the qDockWidget works without any Problem.

SGaist

Hi,

I wonder if it's related to QTBUG-52206. In any case, you should consider updating your version of Qt. The current is 5.10.1 with 5.11 around the corner.

gde23

Hi,
I have updated Qt to Version 5.10.1. on the Windows device.
Now when I undock the widget everything is fine, however when I redock the widget (double click on the title bar or dragging back to the dock) the widget constent is not painted anymore asdescribed before and the error

UpdateLayeredWindowIndirect failed for ptDst=(0, 149), size=(290x531), dirty=(290x531 0, 149) (Falscher Parameter.)

reoccures again.
However this time after redocking and not after undocking.

SGaist

Well... Looks like some kind of progress...

Did you also try with the 5.11 beta ?

gde23

@SGaist
Yeah, it's some kind of progress :)
The 5.11 beta gives the same results as the 5.10.1 does.

SGaist

Then I'd say you have material for a new bug report.