/usr/lib/python3/dist-packages/qtpy/_patch/qcombobox.py is in python3-qtpy 1.2.1-2.
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# qt-helpers, which was released under a 3-Clause BSD license:
#
# Copyright (c) 2015, Chris Beaumont and Thomas Robitaille
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def patch_qcombobox(QComboBox):
"""
In PySide, using Python objects as userData in QComboBox causes
Segmentation faults under certain conditions. Even in cases where it
doesn't, findData does not work correctly. Likewise, findData also does not
work correctly with Python objects when using PyQt4. On the other hand,
PyQt5 deals with this case correctly. We therefore patch QComboBox when
using PyQt4 and PySide to avoid issues.
"""
from ..QtGui import QIcon
from ..QtCore import Qt, QObject
class userDataWrapper():
"""
This class is used to wrap any userData object. If we don't do this,
then certain types of objects can cause segmentation faults or issues
depending on whether/how __getitem__ is defined.
"""
def __init__(self, data):
self.data = data
_addItem = QComboBox.addItem
def addItem(self, *args, **kwargs):
if len(args) == 3 or (not isinstance(args[0], QIcon)
and len(args) == 2):
args, kwargs['userData'] = args[:-1], args[-1]
if 'userData' in kwargs:
kwargs['userData'] = userDataWrapper(kwargs['userData'])
_addItem(self, *args, **kwargs)
_insertItem = QComboBox.insertItem
def insertItem(self, *args, **kwargs):
if len(args) == 4 or (not isinstance(args[1], QIcon)
and len(args) == 3):
args, kwargs['userData'] = args[:-1], args[-1]
if 'userData' in kwargs:
kwargs['userData'] = userDataWrapper(kwargs['userData'])
_insertItem(self, *args, **kwargs)
_setItemData = QComboBox.setItemData
def setItemData(self, index, value, role=Qt.UserRole):
value = userDataWrapper(value)
_setItemData(self, index, value, role=role)
_itemData = QComboBox.itemData
def itemData(self, index, role=Qt.UserRole):
userData = _itemData(self, index, role=role)
if isinstance(userData, userDataWrapper):
userData = userData.data
return userData
def findData(self, value):
for i in range(self.count()):
if self.itemData(i) == value:
return i
return -1
QComboBox.addItem = addItem
QComboBox.insertItem = insertItem
QComboBox.setItemData = setItemData
QComboBox.itemData = itemData
QComboBox.findData = findData
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