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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2004-2019 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This module provides convenient functions related to Qt.
"""
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "30/11/2016"
import sys as _sys
from . import _qt
def supportedImageFormats():
"""Return a set of string of file format extensions supported by the
Qt runtime."""
if _sys.version_info[0] < 3 or _qt.BINDING == 'PySide':
convert = str
elif _qt.BINDING == 'PySide2':
def convert(data):
return str(data.data(), 'ascii')
else:
convert = lambda data: str(data, 'ascii')
formats = _qt.QImageReader.supportedImageFormats()
return set([convert(data) for data in formats])
__globalThreadPoolInstance = None
"""Store the own silx global thread pool"""
def silxGlobalThreadPool():
""""Manage an own QThreadPool to avoid issue on Qt5 Windows with the
default Qt global thread pool.
:rtype: qt.QThreadPool
"""
global __globalThreadPoolInstance
if __globalThreadPoolInstance is None:
tp = _qt.QThreadPool()
# This pointless command fixes a segfault with PyQt 5.9.1 on Windows
tp.setMaxThreadCount(tp.maxThreadCount())
__globalThreadPoolInstance = tp
return __globalThreadPoolInstance
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