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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 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 Property, Signal, QTimer, QUrl, QObject, Slot
from PySide6.QtGui import QGuiApplication
from PySide6.QtQml import (qmlRegisterSingletonType, qmlRegisterSingletonInstance,
QmlElement, QmlSingleton, QJSValue)
from PySide6.QtQuick import QQuickView
URI = "Singletons"
finalResult = 0
qObjectQmlTypeId = 0
class SingletonQObject(QObject):
def __init__(self, parent=None):
QObject.__init__(self, parent)
self._data = 100
def getData(self):
return self._data
def setData(self, data):
global finalResult
finalResult = self._data = data
data = Property(int, getData, setData)
def singletonQObjectCallback(engine):
obj = SingletonQObject()
obj.setData(50)
return obj
def singletonQJSValueCallback(engine):
return engine.evaluate("new Object({data: 50})")
QML_IMPORT_NAME = URI
QML_IMPORT_MAJOR_VERSION = 1
@QmlElement
@QmlSingleton
class DecoratedSingletonQObject(QObject):
def __init__(self, parent=None):
super().__init__(parent)
self._data = 200
def getData(self):
return self._data
def setData(self, data):
self._data = data
data = Property(int, getData, setData)
@QmlElement
@QmlSingleton
class DecoratedSingletonWithCreate(QObject):
def __init__(self, data, parent=None):
super().__init__(parent)
self._data = data
@staticmethod
def create(engine):
return DecoratedSingletonWithCreate(400)
def getData(self):
return self._data
def setData(self, data):
self._data = data
data = Property(int, getData, setData)
class TestQuickView(QQuickView):
def __init__(self, parent=None):
super().__init__(parent)
self._singleton_instance_qobject_int = False
self._singleton_instance_qobject_str = False
self._singleton_instance_jsvalue_int = False
@Slot()
def testSlot(self):
engine = self.engine()
instance = engine.singletonInstance(qObjectQmlTypeId)
if instance is not None and isinstance(instance, QObject):
self._singleton_instance_qobject_int = True
instance = engine.singletonInstance(URI, 'SingletonQObjectNoCallback')
if instance is not None and isinstance(instance, QObject):
self._singleton_instance_qobject_str = True
instance = engine.singletonInstance(URI, 'SingletonQJSValue')
if instance is not None and isinstance(instance, QJSValue):
self._singleton_instance_jsvalue_int = True
self.close()
class TestQmlSupport(unittest.TestCase):
def testIt(self):
app = QGuiApplication([])
qObjectQmlTypeId = qmlRegisterSingletonType(SingletonQObject, URI, 1, 0,
'SingletonQObjectNoCallback')
qmlRegisterSingletonType(SingletonQObject, URI, 1, 0, 'SingletonQObjectCallback',
singletonQObjectCallback)
qmlRegisterSingletonType(URI, 1, 0, 'SingletonQJSValue', singletonQJSValueCallback)
# Accepts only QObject derived types
l = [1, 2]
with self.assertRaises(TypeError):
qmlRegisterSingletonInstance(SingletonQObject, URI, 1, 0, 'SingletonInstance', l)
# Modify value on the instance
s = SingletonQObject()
s.setData(99)
qmlRegisterSingletonInstance(SingletonQObject, URI, 1, 0, 'SingletonInstance', s)
view = TestQuickView()
file = Path(__file__).resolve().parent / 'registersingletontype.qml'
self.assertTrue(file.is_file())
view.setSource(QUrl.fromLocalFile(file))
self.assertTrue(view.rootObject(), quickview_errorstring(view))
view.resize(200, 200)
view.show()
QTimer.singleShot(250, view.testSlot)
app.exec()
self.assertEqual(finalResult, 899)
self.assertTrue(view._singleton_instance_qobject_int)
self.assertTrue(view._singleton_instance_qobject_str)
self.assertTrue(view._singleton_instance_jsvalue_int)
if __name__ == '__main__': unittest.main()
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