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prevent widget shortcut conflicts with menu proxies...
prevent widget shortcut conflicts with menu proxies set some menu bar contexts to Widget, preventing conflict. Essentially, these events will never be called by shortcut, as the events for which they are a proxy are already bound to the shortcut, and get it instead. This is a bit ugly, because the menu shortcuts aren't really active - they depend on the widget shortcuts being the same.

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qt.py
66 lines | 2.1 KiB | text/x-python | PythonLexer
""" A Qt API selector that can be used to switch between PyQt and PySide.
This uses the ETS 4.0 selection pattern of:
PySide first, PyQt with API v2. second.
Do not use this if you need PyQt with the old QString/QVariant API.
"""
import os
# Available APIs.
QT_API_PYQT = 'pyqt'
QT_API_PYSIDE = 'pyside'
def prepare_pyqt4():
# For PySide compatibility, use the new-style string API that automatically
# converts QStrings to Unicode Python strings. Also, automatically unpack
# QVariants to their underlying objects.
import sip
sip.setapi('QString', 2)
sip.setapi('QVariant', 2)
# Select Qt binding, using the QT_API environment variable if available.
QT_API = os.environ.get('QT_API')
if QT_API is None:
try:
import PySide
if PySide.__version__ < '1.0.3':
# old PySide, fallback on PyQt
raise ImportError
QT_API = QT_API_PYSIDE
except ImportError:
try:
prepare_pyqt4()
import PyQt4
from PyQt4 import QtCore
if QtCore.PYQT_VERSION_STR < '4.7':
# PyQt 4.6 has issues with null strings returning as None
raise ImportError
QT_API = QT_API_PYQT
except ImportError:
raise ImportError('Cannot import PySide >= 1.0.3 or PyQt4 >= 4.7')
elif QT_API == QT_API_PYQT:
# Note: This must be called *before* PyQt4 is imported.
prepare_pyqt4()
# Now peform the imports.
if QT_API == QT_API_PYQT:
from PyQt4 import QtCore, QtGui, QtSvg
if QtCore.PYQT_VERSION_STR < '4.7':
raise ImportError("IPython requires PyQt4 >= 4.7, found %s"%QtCore.PYQT_VERSION_STR)
# Alias PyQt-specific functions for PySide compatibility.
QtCore.Signal = QtCore.pyqtSignal
QtCore.Slot = QtCore.pyqtSlot
elif QT_API == QT_API_PYSIDE:
import PySide
if PySide.__version__ < '1.0.3':
raise ImportError("IPython requires PySide >= 1.0.3, found %s"%PySide.__version__)
from PySide import QtCore, QtGui, QtSvg
else:
raise RuntimeError('Invalid Qt API %r, valid values are: %r or %r' %
(QT_API, QT_API_PYQT, QT_API_PYSIDE))