For some reason if I set the windowFlag "Popup" on a QListWidget, the widget
takes modal focus and it is impossible to give focus back to any widget. In
fact, my entire system becomes unresponsive. Only the QListWidget responds
to input, and I have no way of killing the process. Here is a very stripped
down example of this problem:
##############################
from PyQt4 import QtCore, QtGui
app = QtGui.QApplication([])
w = QtGui.QListWidget()
w.setWindowFlags(QtCore.Qt.Popup)
w.addItems(["foo","bar","baz"])
button = QtGui.QPushButton("Click Me")
QtCore.QObject.connect(button, QtCore.SIGNAL("clicked()"), w.show)
button.show()
app.exec_()
##############################
When I run this bit of code and click on the button, a QListWidget pops up
on top of everything. I can select each of the 3 items in the list as
expected, but if I click anywhere outside the QListWidget, nothing responds,
not even if I try to click on items in the taskbar or the windows for other
running apps! It has something to do with it being a QListWidget, because if
I change it to just a QWidget, I can click outside of it and things still
respond.
Am I doing something wrong or is this a bug?
Here are my system specs:
GNU/Linux x86_64, Fedora release 8 (Werewolf)
PyQt 4.5.4
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