[Interest] Problems with QDockWidgets in Qt5.6.1 and Qt5.7

[Chris Gripeos]

Hello,


I'm seeing some new and strange behaviour after upgrading our app from Qt5.6.0 to Qt5.6.1 and even Qt5.7.0 (5.6.1 and 5.7 have the same exact behaviour).


I have a QDockWidget with:


setAllowedAreas(Qt::AllDockWidgetAreas)


And I have a QMainWindow with:


setDockOptions(QMainWindow::AllowTabbedDocks | QMainWindow::AllowNestedDocks);
setTabPosition(Qt::AllDockWidgetAreas, QTabWidget::North);


The QMainWindow is populated with a Central Widget that has a minimum width, but still has plenty of room to add the QDockWidget to the left or right areas.


The QDockWidget has a minimum width and height, but still has plenty of room to be docked in the QMainWindow.



Now, when I drag the QDockWidget in the QMainWindow, Qt highlights the areas on the left, top, bottom, and right as I drag the QDockWidget around. This tells me that if the dock areas are highlighted I should be allowed to drop the QDockWidget on them.


The problem is that as soon as i drop the QDockWidget in those areas, the Widget only gets docked on the Right Area.


No matter which area I try to drop it on, it always ends up on the Right.


In Qt5.6.0 and earlier (we were on Qt4.8 before that):

- Qt would *only* highlight areas where a Widget was allowed to be docked. Qt5.6.1 seems to highlight all areas, even when not allowed (no-fit).

- Docking was possible on the highlighted areas without the QDockWidget always getting docked on the Right.


Has anybody else experience such a problem with Qt5.6.1 or Qt5.7.0?


Does anybody know what it might be that we're doing wrong?



Thanks in advance for any help with this problem!


- Chris

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