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#!/usr/bin/python
# 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 gc
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.helper import quickview_errorstring
from PySide6.QtCore import QObject, QUrl, Slot, QTimer
from PySide6.QtGui import QGuiApplication
from PySide6.QtQml import QQmlIncubationController, VolatileBool
from PySide6.QtQuick import QQuickView
class CustomIncubationController(QObject, QQmlIncubationController):
def __init__(self, test):
QObject.__init__(self)
QQmlIncubationController.__init__(self)
self.test = test
self.interrupted = False
# Incubate every 50 milliseconds
self.startTimer(50)
self.incubationShouldContinue = VolatileBool(True)
self.test.assertEqual(self.incubationShouldContinue.get(), True)
@Slot()
def interrupter(self):
if not self.interrupted:
self.interrupted = True
self.incubationShouldContinue.set(False)
self.test.assertEqual(self.incubationShouldContinue.get(), False)
QTimer.singleShot(0, QGuiApplication.instance().quit)
def timerEvent(self, ev):
# Incubate items for 2000 milliseconds, or until the volatile bool is set to false.
self.incubateWhile(self.incubationShouldContinue, 2000)
class TestBug(unittest.TestCase):
def testIncubateWhileCall(self):
app = QGuiApplication(sys.argv)
view = QQuickView()
controller = CustomIncubationController(self)
view.engine().setIncubationController(controller)
view.setResizeMode(QQuickView.SizeRootObjectToView)
file = Path(__file__).resolve().parent / 'qqmlincubator_incubateWhile.qml'
self.assertTrue(file.is_file())
view.setSource(QUrl.fromLocalFile(file))
self.assertTrue(view.rootObject(), quickview_errorstring(view))
view.show()
root = view.rootObject()
# The QML code will issue an interrupt signal after half of its items are loaded.
root.shouldInterrupt.connect(controller.interrupter)
res = app.exec()
itemsToCreate = root.property("itemsToCreate")
loadedItems = root.property("loadedItems")
self.assertEqual(loadedItems, itemsToCreate / 2)
# Finish incubating the remaining items.
controller.incubateFor(1000)
loadedItems = root.property("loadedItems")
self.assertEqual(loadedItems, itemsToCreate)
# Deleting the view before it goes out of scope is required to make sure all child QML
# instances are destroyed in the correct order.
del view
del app
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
if __name__ == '__main__':
unittest.main()
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