My QMessageBox.question buttons didn't show up

[Michael Boon]

Hi, I've just had a bug report from someone who had to force close Maya 2017 because I popped up a QMessageBox and the buttons that were supposed to be on it were missing.

Here's a sanitised version of my code. parentWin is a QMainWindow whose parent is the Maya window.

from PySide2 import QtWidgets

message = 'This is the message'

choice = QtWidgets.QMessageBox.question(

    parentWin,

    'Dialog title', 

    message,

    QtWidgets.QMessageBox.Yes |

    QtWidgets.QMessageBox.No,

    defaultButton=QtWidgets.QMessageBox.Yes)

I know many years ago, Windows could run out of resources and things like this could happen but I haven't heard of anything like that for at least 5 years. Can anyone speculate why this could happen under Windows 10?

[Marcus Ottosson]

If it happened under Maya 2017 pre update 4, then it could be a Maya issue more than anything else. PySide2 is under heavy development even as we speak.

[Michael Boon]

Good point, thanks.

[Ravi Jagannadhan]

Hi all, so I'm seeing this happen on Maya 2017 Update 4 on MacOS and wondering if anyone's seen similar behaviour in their versions. Like Michael, I'm trying to use a QMessageBox. My script looks like this: 

---- SNIP ---- 
import logging
import Qt
from Qt import QtGui, QtCore, QtWidgets

try:
    from Qt import QtUiTools
except ImportError as e:
    if Qt.__binding__ in ('PySide'):
        from PySide import QtUiTools
    else:
        from PySide2 import QtUiTools
       
msgBox = QtWidgets.QMessageBox()
msgBox.setText('What to do?')
msgBox.addButton(QtWidgets.QPushButton('Accept'), QtWidgets.QMessageBox.YesRole)
msgBox.addButton(QtWidgets.QPushButton('Reject'), QtWidgets.QMessageBox.NoRole)
msgBox.addButton(QtWidgets.QPushButton('Cancel'), QtWidgets.QMessageBox.RejectRole)
ret = msgBox.exec_() 

---- SNIP ---- 

Any ideas?

Thank you for your time,

Ravi

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