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# (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 os
import sys
import warnings
from traits.etsconfig.api import ETSConfig
from pyface.ui import ShadowedModuleFinder
if any(
(
isinstance(finder, ShadowedModuleFinder)
and finder.package == "pyface.ui.qt4."
)
for finder in sys.meta_path
):
# Importing from pyface.ui.qt4.* is deprecated
# Already have loader registered.
warnings.warn(
"""The pyface.ui.qt4.* modules have moved to pyface.ui.qt.*
Backward compatibility import hooks are in place. They will be removed in a
future release of Pyface.
""",
DeprecationWarning,
stacklevel=2,
)
elif (
os.environ.get('ETS_QT4_IMPORTS', None) # environment says we want this
or os.environ.get('ETS_TOOLKIT', None) == "qt4" # environment says old qt4
or ETSConfig.toolkit == "qt4" # the ETSConfig toolkit says old qt4
):
# Register our loader. This is messing with global state that we do not own
# so we only do it when we have other global state telling us to.
sys.meta_path.append(ShadowedModuleFinder())
# Importing from pyface.ui.qt4.* is deprecated
warnings.warn(
"""The pyface.ui.qt4.* modules have moved to pyface.ui.qt.*
Backward compatibility import hooks have been automatically applied.
They will be removed in a future release of Pyface.
""",
DeprecationWarning,
stacklevel=2,
)
else:
# Don't import from this module, use a future warning as we want end-users
# of ETS apps to see the hints about environment variables.
warnings.warn(
"""The pyface.ui.qt4.* modules have moved to pyface.ui.qt.*.
Applications which require backwards compatibility can either:
- set the ETS_QT4_IMPORTS environment variable
- set the ETS_TOOLKIT environment variable to "qt4",
- the ETSConfig.toolkit to "qt4"
- install pyface.ui.ShadowedModuleFinder() into sys.meta_path
""",
FutureWarning,
stacklevel=2,
)
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