message_box example and factories(about, critical, questions, etc.) don't work

[blakejohnson]

In trying to run the message_box example, if I click on any of the buttons I get the error message: AttributeError: 'NoneType' object has no attribute 'setWidget'. The call stack shows that this happens in the call to set_parent.

Possibly relevant: I am using PySide rather than PyQt.

[sccolbert]

Sounds like a PySide bug. Can you test on PyQt and confirm?

[blakejohnson]

Indeed, this does seem to work with PyQt.

[sccolbert]

Thanks. Marking as PySide bug.

[kiwi0fruit]

Message box doesn't work with PySide2

Simply using message box leads to error with PySide2:

from enaml.stdlib.message_box import information
...
    triggered ::
        information(self, "Testing",
            ("If you see this then presumably PySide-Enaml bug was patched.\n" +
             "But it still can be broken if Python hangs after pressing OK.")
        )
...

Error:

Traceback (most recent call last):
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\qt\qt_action.py", line 79, in on_triggered
    self.declaration.triggered(checked)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\core\declarative_meta.py", line 68, in declarative_change_handler
    engine.write(owner, change['name'], change)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\core\expression_engine.py", line 217, in write
    pair.writer(owner, name, change)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\core\standard_handlers.py", line 82, in __call__
    call_func(func, (), {}, scope)
  File "C:\PyCharmProjects\enaml_video\enaml_video_view.enaml", line 51, in f
    )
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\stdlib\message_box.enaml", line 148, in information
    return _exec_box(parent, title, text, buttons, 'information')
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\stdlib\message_box.enaml", line 305, in _exec_box
    box.set_parent(parent)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\core\object.py", line 160, in set_parent
    parent.child_added(self)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\widgets\toolkit_object.py", line 185, in child_added
    child.activate_proxy()
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\widgets\toolkit_object.py", line 210, in activate_proxy
    self.activate_top_down()
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\widgets\toolkit_object.py", line 226, in activate_top_down
    self.proxy.activate_top_down()
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\qt\qt_toolkit_object.py", line 75, in activate_top_down
    self.create_widget()
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\qt\qt_dialog.py", line 72, in create_widget
    self.widget = QWindowDialog(self, self.parent_widget(), flags)
  File "C:\Miniconda3\envs\enaml\lib\site-packages\enaml\qt\qt_dialog.py", line 41, in __init__
    super(QWindowDialog, self).__init__(parent, flags)
TypeError: 'PySide2.QtWidgets.QDialog' called with wrong argument types:
  PySide2.QtWidgets.QDialog(PySide2.QtWidgets.QAction, PySide2.QtCore.Qt.WindowType)
Supported signatures:
  PySide2.QtWidgets.QDialog(PySide2.QtWidgets.QWidget = nullptr, PySide2.QtCore.Qt.WindowFlags = Qt.WindowFlags())

Process finished with exit code 0

Presumably now it's worth investigations as PySide2 was added to pypi. I installed PySide2-5.11.1 from pip (pip install pyside2 + delete qt.conf if it's near python.exe).

Related issue about work arounds for this bug stopped working with PySide1. But I didn't test them with PySide2 because I'm more interested in upstream solution rather than a work around.

[MatthieuDartiailh]

Indeed this is new I believe. I will try to investigate but I do not know when I will find time to do so.