[Interest] Issue with menubar on MacOS X 10.9 and 10.10 with Qt 4.8

Thomas Robitaille thomas.robitaille at gmail.com
Sun Sep 13 22:45:45 CEST 2015

Hi everyone,

On MacOS X 10.9 and 10.10 I am seeing buggy behavior with the menubar
in Qt4 applications. If I run the following Python example with PyQt4:

    from PyQt4.QtGui import QApplication, QMainWindow, QMenu

    app = QApplication([''])
    main = QMainWindow()
    mbar = main.menuBar()
    menu = QMenu(mbar)

Then the window appears and comes to the foreground but the menubar
does not change:

https://i.imgur.com/ouqpo0s.png [screenshot]

Note that the window is in the foreground (the three buttons top left
are colored) but the menubar is whatever it was before I launched the
application. If I then go to another application and come back, then
the menu appears.

However, on MacOS X 10.8 for example, this works correctly. Is this a
known issue? Does anyone know of any workarounds to prevent this issue
from happening?

I asked this question on the PyQt mailing list, but I was told this is
likely a Qt bug, hence why I am asking here.


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