Source code for silx.gui.qt
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2004-2016 European Synchrotron Radiation Facility
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# furnished to do so, subject to the following conditions:
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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"""Common wrapper over Python Qt bindings: PyQt5, PyQt4, PySide.
This module provides a flattened namespace over Qt bindings.
If a Qt bindings is already loaded, it will be used, otherwise the different
bindings are tried in this order: PyQt4, PySide, PyQt5.
The name of the loaded Qt bindings is stored in the BINDING variable.
For an alternative solution providing a structured namespace,
see `qtpy <https://pypi.python.org/pypi/QtPy/>`_ which
provides the namespace of PyQt5 over PyQt4 and PySide.
"""
__authors__ = ["V.A. Sole - ESRF Data Analysis"]
__license__ = "MIT"
__date__ = "16/02/2016"
import logging
import sys
_logger = logging.getLogger(__name__)
BINDING = None
"""The Python Qt binding that is used (One of: 'PySide', 'PyQt5', 'PyQt4')."""
HAS_SVG = False
"""True if Qt provides support for Scalable Vector Graphics (QtSVG)."""
# First check for an already loaded wrapper
if 'PySide' in sys.modules:
BINDING = 'PySide'
elif 'PyQt5' in sys.modules:
BINDING = 'PyQt5'
elif 'PyQt4' in sys.modules:
BINDING = 'PyQt4'
else: # Then try Qt bindings
try:
import PyQt4 # noqa
except ImportError:
try:
import PySide # noqa
except ImportError:
try:
import PyQt5 # noqa
except ImportError:
raise ImportError(
'No Qt wrapper found. Install PyQt4, PyQt5 or PySide.')
else:
BINDING = 'PyQt5'
else:
BINDING = 'PySide'
else:
BINDING = 'PyQt4'
if BINDING == 'PyQt4':
_logger.debug('Using PyQt4 bindings')
if sys.version < "3.0.0":
try:
import sip
sip.setapi("QString", 2)
sip.setapi("QVariant", 2)
except:
_logger.warning("Cannot set sip API")
from PyQt4.QtCore import * # noqa
from PyQt4.QtGui import * # noqa
try:
from PyQt4.QtOpenGL import * # noqa
except ImportError:
_logger.info("PyQt4.QtOpenGL not available")
try:
from PyQt4.QtSvg import * # noqa
except ImportError:
_logger.info("PyQt4.QtSvg not available")
HAS_SVG = False
else:
HAS_SVG = True
Signal = pyqtSignal
elif BINDING == 'PySide':
_logger.debug('Using PySide bindings')
from PySide.QtCore import * # noqa
from PySide.QtGui import * # noqa
try:
from PySide.QtOpenGL import * # noqa
except ImportError:
_logger.info("PySide.QtOpenGL not available")
try:
from PySide.QtSvg import * # noqa
except ImportError:
_logger.info("PySide.QtSvg not available")
HAS_SVG = False
else:
HAS_SVG = True
elif BINDING == 'PyQt5':
_logger.debug('Using PyQt5 bindings')
from PyQt5.QtCore import * # noqa
from PyQt5.QtGui import * # noqa
from PyQt5.QtWidgets import * # noqa
from PyQt5.QtPrintSupport import * # noqa
try:
from PyQt5.QtOpenGL import * # noqa
except ImportError:
_logger.info("PyQt5.QtOpenGL not available")
try:
from PyQt5.QtSvg import * # noqa
except ImportError:
_logger.info("PyQt5.QtSvg not available")
HAS_SVG = False
else:
HAS_SVG = True
Signal = pyqtSignal
else:
raise ImportError('No Qt wrapper found. Install PyQt4, PyQt5 or PySide')