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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
import sys
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)
from helper.usesqapplication import UsesQApplication
from PySide6.QtGui import QWindow
from PySide6.QtWidgets import (QApplication, QFontComboBox, QLabel, QProxyStyle,
QStyleFactory, QWidget)
class ProxyStyle(QProxyStyle):
def __init__(self, style):
QProxyStyle.__init__(self, style)
self.polished = 0
def polish(self, widget):
self.polished = self.polished + 1
super(ProxyStyle, self).polish(widget)
class SetStyleTest(UsesQApplication):
'''Tests setting the same QStyle for all objects in a UI hierarchy.'''
def testSetStyle(self):
'''All this test have to do is not break with some invalid Python wrapper.'''
def setStyleHelper(widget, style):
widget.setStyle(style)
widget.setPalette(style.standardPalette())
for child in widget.children():
if isinstance(child, QWidget):
setStyleHelper(child, style)
container = QWidget()
# QFontComboBox is used because it has an QLineEdit created in C++ inside it,
# and if the QWidget.setStyle(style) steals the ownership of the style
# for the C++ originated widget everything will break.
fontComboBox = QFontComboBox(container)
label = QLabel(container)
label.setText('Label')
style = QStyleFactory.create(QStyleFactory.keys()[0])
setStyleHelper(container, style)
def testSetProxyStyle(self):
label = QLabel("QtWidgets/ProxyStyle test")
baseStyle = QStyleFactory.create(QApplication.instance().style().objectName())
self.assertTrue(baseStyle)
proxyStyle = ProxyStyle(baseStyle)
label.setStyle(proxyStyle)
label.show()
while not label.windowHandle().isExposed():
QApplication.instance().processEvents()
self.assertTrue(proxyStyle.polished > 0)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testSetStyleOwnership(self):
style = QStyleFactory.create(QStyleFactory.keys()[0])
self.assertEqual(sys.getrefcount(style), 2)
QApplication.instance().setStyle(style)
self.assertEqual(sys.getrefcount(style), 3)
if __name__ == '__main__':
unittest.main()
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