/usr/lib/python3/dist-packages/qtpy/compat.py is in python3-qtpy 1.2.1-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | # -*- coding: utf-8 -*-
#
# Copyright © 2009- The Spyder Development Team
# Licensed under the terms of the MIT License
"""
Compatibility functions
"""
from __future__ import print_function
import sys
import collections
from . import PYQT4
from .QtWidgets import QFileDialog
from .py3compat import is_text_string, to_text_string, TEXT_TYPES
# =============================================================================
# QVariant conversion utilities
# =============================================================================
PYQT_API_1 = False
if PYQT4:
import sip
try:
PYQT_API_1 = sip.getapi('QVariant') == 1 # PyQt API #1
except AttributeError:
# PyQt <v4.6
PYQT_API_1 = True
def to_qvariant(pyobj=None):
"""Convert Python object to QVariant
This is a transitional function from PyQt API #1 (QVariant exist)
to PyQt API #2 and Pyside (QVariant does not exist)"""
if PYQT_API_1:
# PyQt API #1
from PyQt4.QtCore import QVariant
return QVariant(pyobj)
else:
# PyQt API #2
return pyobj
def from_qvariant(qobj=None, convfunc=None):
"""Convert QVariant object to Python object
This is a transitional function from PyQt API #1 (QVariant exist)
to PyQt API #2 and Pyside (QVariant does not exist)"""
if PYQT_API_1:
# PyQt API #1
assert isinstance(convfunc, collections.Callable)
if convfunc in TEXT_TYPES or convfunc is to_text_string:
return convfunc(qobj.toString())
elif convfunc is bool:
return qobj.toBool()
elif convfunc is int:
return qobj.toInt()[0]
elif convfunc is float:
return qobj.toDouble()[0]
else:
return convfunc(qobj)
else:
# PyQt API #2
return qobj
else:
def to_qvariant(obj=None): # analysis:ignore
"""Convert Python object to QVariant
This is a transitional function from PyQt API#1 (QVariant exist)
to PyQt API#2 and Pyside (QVariant does not exist)"""
return obj
def from_qvariant(qobj=None, pytype=None): # analysis:ignore
"""Convert QVariant object to Python object
This is a transitional function from PyQt API #1 (QVariant exist)
to PyQt API #2 and Pyside (QVariant does not exist)"""
return qobj
# =============================================================================
# Wrappers around QFileDialog static methods
# =============================================================================
def getexistingdirectory(parent=None, caption='', basedir='',
options=QFileDialog.ShowDirsOnly):
"""Wrapper around QtGui.QFileDialog.getExistingDirectory static method
Compatible with PyQt >=v4.4 (API #1 and #2) and PySide >=v1.0"""
# Calling QFileDialog static method
if sys.platform == "win32":
# On Windows platforms: redirect standard outputs
_temp1, _temp2 = sys.stdout, sys.stderr
sys.stdout, sys.stderr = None, None
try:
result = QFileDialog.getExistingDirectory(parent, caption, basedir,
options)
finally:
if sys.platform == "win32":
# On Windows platforms: restore standard outputs
sys.stdout, sys.stderr = _temp1, _temp2
if not is_text_string(result):
# PyQt API #1
result = to_text_string(result)
return result
def _qfiledialog_wrapper(attr, parent=None, caption='', basedir='',
filters='', selectedfilter='', options=None):
if options is None:
options = QFileDialog.Options(0)
try:
# PyQt <v4.6 (API #1)
from .QtCore import QString
except ImportError:
# PySide or PyQt >=v4.6
QString = None # analysis:ignore
tuple_returned = True
try:
# PyQt >=v4.6
func = getattr(QFileDialog, attr+'AndFilter')
except AttributeError:
# PySide or PyQt <v4.6
func = getattr(QFileDialog, attr)
if QString is not None:
selectedfilter = QString()
tuple_returned = False
# Calling QFileDialog static method
if sys.platform == "win32":
# On Windows platforms: redirect standard outputs
_temp1, _temp2 = sys.stdout, sys.stderr
sys.stdout, sys.stderr = None, None
try:
result = func(parent, caption, basedir,
filters, selectedfilter, options)
except TypeError:
# The selectedfilter option (`initialFilter` in Qt) has only been
# introduced in Jan. 2010 for PyQt v4.7, that's why we handle here
# the TypeError exception which will be raised with PyQt v4.6
# (see Issue 960 for more details)
result = func(parent, caption, basedir, filters, options)
finally:
if sys.platform == "win32":
# On Windows platforms: restore standard outputs
sys.stdout, sys.stderr = _temp1, _temp2
# Processing output
if tuple_returned:
# PySide or PyQt >=v4.6
output, selectedfilter = result
else:
# PyQt <v4.6 (API #1)
output = result
if QString is not None:
# PyQt API #1: conversions needed from QString/QStringList
selectedfilter = to_text_string(selectedfilter)
if isinstance(output, QString):
# Single filename
output = to_text_string(output)
else:
# List of filenames
output = [to_text_string(fname) for fname in output]
# Always returns the tuple (output, selectedfilter)
return output, selectedfilter
def getopenfilename(parent=None, caption='', basedir='', filters='',
selectedfilter='', options=None):
"""Wrapper around QtGui.QFileDialog.getOpenFileName static method
Returns a tuple (filename, selectedfilter) -- when dialog box is canceled,
returns a tuple of empty strings
Compatible with PyQt >=v4.4 (API #1 and #2) and PySide >=v1.0"""
return _qfiledialog_wrapper('getOpenFileName', parent=parent,
caption=caption, basedir=basedir,
filters=filters, selectedfilter=selectedfilter,
options=options)
def getopenfilenames(parent=None, caption='', basedir='', filters='',
selectedfilter='', options=None):
"""Wrapper around QtGui.QFileDialog.getOpenFileNames static method
Returns a tuple (filenames, selectedfilter) -- when dialog box is canceled,
returns a tuple (empty list, empty string)
Compatible with PyQt >=v4.4 (API #1 and #2) and PySide >=v1.0"""
return _qfiledialog_wrapper('getOpenFileNames', parent=parent,
caption=caption, basedir=basedir,
filters=filters, selectedfilter=selectedfilter,
options=options)
def getsavefilename(parent=None, caption='', basedir='', filters='',
selectedfilter='', options=None):
"""Wrapper around QtGui.QFileDialog.getSaveFileName static method
Returns a tuple (filename, selectedfilter) -- when dialog box is canceled,
returns a tuple of empty strings
Compatible with PyQt >=v4.4 (API #1 and #2) and PySide >=v1.0"""
return _qfiledialog_wrapper('getSaveFileName', parent=parent,
caption=caption, basedir=basedir,
filters=filters, selectedfilter=selectedfilter,
options=options)
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