338 lines
9.5 KiB
Python
338 lines
9.5 KiB
Python
"""
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This module exists to smooth out some of the differences between PySide and PyQt4:
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* Automatically import either PyQt4 or PySide depending on availability
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* Allow to import QtCore/QtGui pyqtgraph.Qt without specifying which Qt wrapper
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you want to use.
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* Declare QtCore.Signal, .Slot in PyQt4
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* Declare loadUiType function for Pyside
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"""
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import os, sys, re, time
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from .python2_3 import asUnicode
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PYSIDE = 'PySide'
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PYSIDE2 = 'PySide2'
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PYQT4 = 'PyQt4'
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PYQT5 = 'PyQt5'
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QT_LIB = os.getenv('PYQTGRAPH_QT_LIB')
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## Automatically determine which Qt package to use (unless specified by
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## environment variable).
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## This is done by first checking to see whether one of the libraries
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## is already imported. If not, then attempt to import PyQt4, then PySide.
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if QT_LIB is None:
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libOrder = [PYQT4, PYSIDE, PYQT5, PYSIDE2]
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for lib in libOrder:
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if lib in sys.modules:
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QT_LIB = lib
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break
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if QT_LIB is None:
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for lib in libOrder:
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try:
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__import__(lib)
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QT_LIB = lib
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break
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except ImportError:
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pass
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if QT_LIB is None:
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raise Exception("PyQtGraph requires one of PyQt4, PyQt5, PySide or PySide2; none of these packages could be imported.")
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class FailedImport(object):
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"""Used to defer ImportErrors until we are sure the module is needed.
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"""
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def __init__(self, err):
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self.err = err
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def __getattr__(self, attr):
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raise self.err
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def _isQObjectAlive(obj):
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"""An approximation of PyQt's isQObjectAlive().
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"""
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try:
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if hasattr(obj, 'parent'):
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obj.parent()
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elif hasattr(obj, 'parentItem'):
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obj.parentItem()
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else:
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raise Exception("Cannot determine whether Qt object %s is still alive." % obj)
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except RuntimeError:
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return False
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else:
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return True
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# Make a loadUiType function like PyQt has
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# Credit:
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# http://stackoverflow.com/questions/4442286/python-code-genration-with-pyside-uic/14195313#14195313
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class _StringIO(object):
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"""Alternative to built-in StringIO needed to circumvent unicode/ascii issues"""
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def __init__(self):
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self.data = []
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def write(self, data):
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self.data.append(data)
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def getvalue(self):
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return ''.join(map(asUnicode, self.data)).encode('utf8')
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def _loadUiType(uiFile):
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"""
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PySide lacks a "loadUiType" command like PyQt4's, so we have to convert
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the ui file to py code in-memory first and then execute it in a
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special frame to retrieve the form_class.
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from stackoverflow: http://stackoverflow.com/a/14195313/3781327
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seems like this might also be a legitimate solution, but I'm not sure
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how to make PyQt4 and pyside look the same...
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http://stackoverflow.com/a/8717832
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"""
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if QT_LIB == "PYSIDE":
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import pysideuic
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else:
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import pyside2uic as pysideuic
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import xml.etree.ElementTree as xml
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parsed = xml.parse(uiFile)
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widget_class = parsed.find('widget').get('class')
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form_class = parsed.find('class').text
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with open(uiFile, 'r') as f:
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o = _StringIO()
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frame = {}
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pysideuic.compileUi(f, o, indent=0)
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pyc = compile(o.getvalue(), '<string>', 'exec')
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exec(pyc, frame)
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#Fetch the base_class and form class based on their type in the xml from designer
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form_class = frame['Ui_%s'%form_class]
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base_class = eval('QtGui.%s'%widget_class)
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return form_class, base_class
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if QT_LIB == PYSIDE:
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from PySide import QtGui, QtCore
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try:
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from PySide import QtOpenGL
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except ImportError as err:
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QtOpenGL = FailedImport(err)
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try:
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from PySide import QtSvg
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except ImportError as err:
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QtSvg = FailedImport(err)
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try:
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from PySide import QtTest
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except ImportError as err:
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QtTest = FailedImport(err)
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try:
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from PySide import shiboken
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isQObjectAlive = shiboken.isValid
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except ImportError:
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# use approximate version
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isQObjectAlive = _isQObjectAlive
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import PySide
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VERSION_INFO = 'PySide ' + PySide.__version__ + ' Qt ' + QtCore.__version__
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elif QT_LIB == PYQT4:
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from PyQt4 import QtGui, QtCore, uic
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try:
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from PyQt4 import QtSvg
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except ImportError as err:
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QtSvg = FailedImport(err)
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try:
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from PyQt4 import QtOpenGL
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except ImportError as err:
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QtOpenGL = FailedImport(err)
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try:
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from PyQt4 import QtTest
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except ImportError as err:
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QtTest = FailedImport(err)
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VERSION_INFO = 'PyQt4 ' + QtCore.PYQT_VERSION_STR + ' Qt ' + QtCore.QT_VERSION_STR
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elif QT_LIB == PYQT5:
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# We're using PyQt5 which has a different structure so we're going to use a shim to
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# recreate the Qt4 structure for Qt5
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from PyQt5 import QtGui, QtCore, QtWidgets, uic
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# PyQt5, starting in v5.5, calls qAbort when an exception is raised inside
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# a slot. To maintain backward compatibility (and sanity for interactive
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# users), we install a global exception hook to override this behavior.
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ver = QtCore.PYQT_VERSION_STR.split('.')
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if int(ver[1]) >= 5:
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if sys.excepthook == sys.__excepthook__:
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sys_excepthook = sys.excepthook
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def pyqt5_qabort_override(*args, **kwds):
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return sys_excepthook(*args, **kwds)
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sys.excepthook = pyqt5_qabort_override
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try:
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from PyQt5 import QtSvg
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except ImportError as err:
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QtSvg = FailedImport(err)
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try:
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from PyQt5 import QtOpenGL
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except ImportError as err:
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QtOpenGL = FailedImport(err)
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try:
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from PyQt5 import QtTest
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QtTest.QTest.qWaitForWindowShown = QtTest.QTest.qWaitForWindowExposed
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except ImportError as err:
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QtTest = FailedImport(err)
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VERSION_INFO = 'PyQt5 ' + QtCore.PYQT_VERSION_STR + ' Qt ' + QtCore.QT_VERSION_STR
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elif QT_LIB == PYSIDE2:
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from PySide2 import QtGui, QtCore, QtWidgets
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try:
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from PySide2 import QtSvg
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except ImportError as err:
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QtSvg = FailedImport(err)
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try:
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from PySide2 import QtOpenGL
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except ImportError as err:
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QtOpenGL = FailedImport(err)
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try:
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from PySide2 import QtTest
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QtTest.QTest.qWaitForWindowShown = QtTest.QTest.qWaitForWindowExposed
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except ImportError as err:
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QtTest = FailedImport(err)
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try:
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import shiboken2
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isQObjectAlive = shiboken2.isValid
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except ImportError:
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# use approximate version
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isQObjectAlive = _isQObjectAlive
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import PySide2
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VERSION_INFO = 'PySide2 ' + PySide2.__version__ + ' Qt ' + QtCore.__version__
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else:
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raise ValueError("Invalid Qt lib '%s'" % QT_LIB)
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# common to PyQt5 and PySide2
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if QT_LIB in [PYQT5, PYSIDE2]:
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# We're using Qt5 which has a different structure so we're going to use a shim to
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# recreate the Qt4 structure
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__QGraphicsItem_scale = QtWidgets.QGraphicsItem.scale
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def scale(self, *args):
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if args:
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sx, sy = args
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tr = self.transform()
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tr.scale(sx, sy)
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self.setTransform(tr)
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else:
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return __QGraphicsItem_scale(self)
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QtWidgets.QGraphicsItem.scale = scale
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def rotate(self, angle):
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tr = self.transform()
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tr.rotate(angle)
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self.setTransform(tr)
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QtWidgets.QGraphicsItem.rotate = rotate
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def translate(self, dx, dy):
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tr = self.transform()
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tr.translate(dx, dy)
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self.setTransform(tr)
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QtWidgets.QGraphicsItem.translate = translate
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def setMargin(self, i):
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self.setContentsMargins(i, i, i, i)
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QtWidgets.QGridLayout.setMargin = setMargin
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def setResizeMode(self, *args):
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self.setSectionResizeMode(*args)
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QtWidgets.QHeaderView.setResizeMode = setResizeMode
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QtGui.QApplication = QtWidgets.QApplication
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QtGui.QGraphicsScene = QtWidgets.QGraphicsScene
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QtGui.QGraphicsObject = QtWidgets.QGraphicsObject
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QtGui.QGraphicsWidget = QtWidgets.QGraphicsWidget
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QtGui.QApplication.setGraphicsSystem = None
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# Import all QtWidgets objects into QtGui
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for o in dir(QtWidgets):
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if o.startswith('Q'):
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setattr(QtGui, o, getattr(QtWidgets,o) )
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# Common to PySide and PySide2
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if QT_LIB in [PYSIDE, PYSIDE2]:
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QtVersion = QtCore.__version__
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loadUiType = _loadUiType
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# PySide does not implement qWait
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if not isinstance(QtTest, FailedImport):
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if not hasattr(QtTest.QTest, 'qWait'):
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@staticmethod
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def qWait(msec):
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start = time.time()
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QtGui.QApplication.processEvents()
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while time.time() < start + msec * 0.001:
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QtGui.QApplication.processEvents()
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QtTest.QTest.qWait = qWait
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# Common to PyQt4 and 5
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if QT_LIB in [PYQT4, PYQT5]:
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QtVersion = QtCore.QT_VERSION_STR
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import sip
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def isQObjectAlive(obj):
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return not sip.isdeleted(obj)
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loadUiType = uic.loadUiType
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QtCore.Signal = QtCore.pyqtSignal
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# USE_XXX variables are deprecated
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USE_PYSIDE = QT_LIB == PYSIDE
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USE_PYQT4 = QT_LIB == PYQT4
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USE_PYQT5 = QT_LIB == PYQT5
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## Make sure we have Qt >= 4.7
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versionReq = [4, 7]
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m = re.match(r'(\d+)\.(\d+).*', QtVersion)
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if m is not None and list(map(int, m.groups())) < versionReq:
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print(list(map(int, m.groups())))
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raise Exception('pyqtgraph requires Qt version >= %d.%d (your version is %s)' % (versionReq[0], versionReq[1], QtVersion))
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QAPP = None
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def mkQApp():
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global QAPP
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QAPP = QtGui.QApplication.instance()
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if QAPP is None:
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QAPP = QtGui.QApplication([])
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return QAPP
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