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# (C) Copyright 2007 Riverbank Computing Limited
# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
import sys
from traits.trait_notifiers import set_ui_handler, ui_handler
from pyface.qt import QtGui
from pyface.base_toolkit import Toolkit
from .gui import GUI
# It's possible that it has already been initialised.
_app = QtGui.QApplication.instance()
if _app is None:
try:
# pyface.qt.QtWebKit tries QtWebEngineWidgets first, but
# if QtWebEngineWidgets is present, it must be imported prior to
# creating a QCoreApplication instance, otherwise importing
# QtWebEngineWidgets later would fail (see enthought/pyface#581).
# Import it here first before creating the instance.
from pyface.qt import QtWebKit # noqa: F401
except ImportError:
# This error will be raised in the context where
# QtWebKit/QtWebEngine widgets are required.
pass
_app = QtGui.QApplication(sys.argv)
# create the toolkit object
toolkit_object = Toolkit("pyface", "qt", "pyface.ui.qt")
# ensure that Traits has a UI handler appropriate for the toolkit.
if ui_handler is None:
# Tell the traits notification handlers to use this UI handler
set_ui_handler(GUI.invoke_later)
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