[PyQt] setting Popup windowFlag causes system to become unresponsive

[Jugdish]

Bug report filed here:

http://bugreports.qt.nokia.com/browse/QTBUG-6355

On Fri, Nov 27, 2009 at 8:50 PM, Hans-Peter Jansen <hpj at urpla.net> wrote:

> On Friday 27 November 2009, 19:34:31 Jugdish wrote:
> > 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?
>
> Same here. Almost certainly, this is a Qt bug. Please file a bug report.
> You
> should be able to workaround this behavior by subclassing QListWidget() and
> adding custom event handler. You will want to do that anyway, since the
> QListWidget appearing in the top left corner isn't that useful either.
>
> > Here are my system specs:
> > GNU/Linux x86_64, Fedora release 8 (Werewolf)
> > PyQt 4.5.4
>
> openSUSE i585, sip 4.9.3, PyQt 4.6.2, Qt 4.5.3
>
> Pete
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>
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