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"""Map all bindings to PySide2
This module replaces itself with the most desirable binding.
Resolution order:
- PySide2
- PyQt5
- PySide
- PyQt4
Usage:
>>> import sys
>>> from Qt import QtWidgets
>>> app = QtWidgets.QApplication(sys.argv)
>>> button = QtWidgets.QPushButton("Hello World")
>>> button.show()
>>> app.exec_()
"""
import os
import sys
__version__ = "0.3.3"
def _pyqt5():
import PyQt5.Qt
# Remap
PyQt5.QtCore.Signal = PyQt5.QtCore.pyqtSignal
PyQt5.QtCore.Slot = PyQt5.QtCore.pyqtSlot
PyQt5.QtCore.Property = PyQt5.QtCore.pyqtProperty
# Add
PyQt5.__wrapper_version__ = __version__
PyQt5.__binding__ = "PyQt5"
PyQt5.__binding_version__ = PyQt5.QtCore.PYQT_VERSION_STR
PyQt5.__qt_version__ = PyQt5.QtCore.QT_VERSION_STR
PyQt5.load_ui = pyqt5_load_ui
return PyQt5
def _pyqt4():
# Attempt to set sip API v2 (must be done prior to importing PyQt4)
import sip
try:
sip.setapi("QString", 2)
sip.setapi("QVariant", 2)
sip.setapi("QDate", 2)
sip.setapi("QDateTime", 2)
sip.setapi("QTextStream", 2)
sip.setapi("QTime", 2)
sip.setapi("QUrl", 2)
except AttributeError:
raise ImportError
# PyQt4 < v4.6
except ValueError:
# API version already set to v1
raise ImportError
import PyQt4.Qt
# Remap
PyQt4.QtWidgets = PyQt4.QtGui
PyQt4.QtCore.Signal = PyQt4.QtCore.pyqtSignal
PyQt4.QtCore.Slot = PyQt4.QtCore.pyqtSlot
PyQt4.QtCore.Property = PyQt4.QtCore.pyqtProperty
PyQt4.QtCore.QItemSelection = PyQt4.QtGui.QItemSelection
PyQt4.QtCore.QItemSelectionModel = PyQt4.QtGui.QItemSelectionModel
# Add
PyQt4.__wrapper_version__ = __version__
PyQt4.__binding__ = "PyQt4"
PyQt4.__binding_version__ = PyQt4.QtCore.PYQT_VERSION_STR
PyQt4.__qt_version__ = PyQt4.QtCore.QT_VERSION_STR
PyQt4.load_ui = pyqt4_load_ui
return PyQt4
def _pyside2():
import PySide2
from PySide2 import QtGui, QtCore
# Remap
QtCore.QStringListModel = QtGui.QStringListModel
# Add
PySide2.__wrapper_version__ = __version__
PySide2.__binding__ = "PySide2"
PySide2.__binding_version__ = PySide2.__version__
PySide2.__qt_version__ = PySide2.QtCore.qVersion()
PySide2.load_ui = pyside2_load_ui
return PySide2
def _pyside():
import PySide
from PySide import QtGui, QtCore
QtCore, QtGui # bypass linter warnings
# Remap
PySide.QtWidgets = PySide.QtGui
PySide.QtCore.QSortFilterProxyModel = PySide.QtGui.QSortFilterProxyModel
PySide.QtCore.QStringListModel = PySide.QtGui.QStringListModel
PySide.QtCore.QItemSelection = PySide.QtGui.QItemSelection
PySide.QtCore.QItemSelectionModel = PySide.QtGui.QItemSelectionModel
# Add
PySide.__wrapper_version__ = __version__
PySide.__binding__ = "PySide"
PySide.__binding_version__ = PySide.__version__
PySide.__qt_version__ = PySide.QtCore.qVersion()
PySide.load_ui = pyside_load_ui
return PySide
def pyside_load_ui(fname):
"""Read Qt Designer .ui `fname`
Args:
fname (str): Absolute path to .ui file
Usage:
>> from Qt import load_ui
>> class MyWindow(QtWidgets.QWidget):
.. fname = 'my_ui.ui'
.. self.ui = load_ui(fname)
..
>> window = MyWindow()
"""
from PySide import QtUiTools
return QtUiTools.QUiLoader().load(fname)
def pyside2_load_ui(fname):
"""Read Qt Designer .ui `fname`
Args:
fname (str): Absolute path to .ui file
"""
from PySide2 import QtUiTools
return QtUiTools.QUiLoader().load(fname)
def pyqt4_load_ui(fname):
"""Read Qt Designer .ui `fname`
Args:
fname (str): Absolute path to .ui file
"""
from PyQt4 import uic
return uic.loadUi(fname)
def pyqt5_load_ui(fname):
"""Read Qt Designer .ui `fname`
Args:
fname (str): Absolute path to .ui file
"""
from PyQt5 import uic
return uic.loadUi(fname)
def _log(text, verbose):
if verbose:
sys.stdout.write(text)
def _init():
"""Try loading each binding in turn
Please note: the entire Qt module is replaced with this code:
sys.modules["Qt"] = binding()
This means no functions or variables can be called after
this has executed.
"""
preferred = os.getenv("QT_PREFERRED_BINDING")
verbose = os.getenv("QT_VERBOSE") is not None
bindings = (_pyside2, _pyqt5, _pyside, _pyqt4)
if preferred:
# Internal flag (used in installer)
if preferred == "None":
sys.modules[__name__].__wrapper_version__ = __version__
return
preferred = preferred.split(os.pathsep)
available = {
"PySide2": _pyside2,
"PyQt5": _pyqt5,
"PySide": _pyside,
"PyQt4": _pyqt4
}
try:
bindings = [available[binding] for binding in preferred]
except KeyError:
raise ImportError(
"Available preferred Qt bindings: "
"\n".join(preferred)
)
for binding in bindings:
_log("Trying %s" % binding.__name__[1:], verbose)
try:
sys.modules[__name__] = binding()
return
except ImportError as e:
_log(" - ImportError(\"%s\")\n" % e, verbose)
continue
# If not binding were found, throw this error
raise ImportError("No Qt binding were found.")
_init()
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