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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 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.usesqapplication import UsesQApplication
from PySide6.QtCore import QTimer
from PySide6.QtWidgets import (QFormLayout, QHBoxLayout, QLayout, QPushButton,
QSpacerItem, QWidget, QWidgetItem)
class MyLayout(QLayout):
def __init__(self, parent=None):
QLayout.__init__(self, parent)
self._list = []
def addItem(self, item):
self.add(item)
def addWidget(self, widget):
self.add(QWidgetItem(widget))
def itemAt(self, index):
if index < len(self._list):
return self._list[index]
return None
def count(self):
return len(self._list)
def add(self, item):
self._list.append(item)
class MissingItemAtLayout(QLayout):
def __init__(self, parent=None):
QLayout.__init__(self, parent)
self._list = []
def addItem(self, item):
self.add(item)
def addWidget(self, widget):
self.add(QWidgetItem(widget))
def count(self):
return len(self._list)
def add(self, item):
self._list.append(item)
# Test if a layout implemented in python, the QWidget.setLayout works
# fine because this implement som layout functions used in glue code of
# QWidget, then in c++ when call a virtual function this need call the QLayout
# function implemented in python
class QLayoutTest(UsesQApplication):
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testOwnershipTransfer(self):
b = QPushButton("teste")
l = MyLayout()
l.addWidget(b)
self.assertEqual(sys.getrefcount(b), 2)
w = QWidget()
# transfer ref
w.setLayout(l)
self.assertEqual(sys.getrefcount(b), 3)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testReferenceTransfer(self):
b = QPushButton("teste")
l = QHBoxLayout()
# keep ref
l.addWidget(b)
self.assertEqual(sys.getrefcount(b), 3)
w = QWidget()
# transfer ref
w.setLayout(l)
self.assertEqual(sys.getrefcount(b), 3)
# release ref
del w
self.assertEqual(sys.getrefcount(b), 2)
def testMissingFunctions(self):
w = QWidget()
b = QPushButton("test")
l = MissingItemAtLayout()
l.addWidget(b)
self.assertRaises(RuntimeError, w.setLayout, l)
def testQFormLayout(self):
w = QWidget()
formLayout = QFormLayout()
spacer = QSpacerItem(100, 30)
formLayout.setItem(0, QFormLayout.SpanningRole, spacer)
w.setLayout(formLayout)
w.show()
QTimer.singleShot(10, w.close)
self.app.exec()
del w
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
# PYSIDE-535: Why do I need to do it twice, here?
gc.collect()
self.assertRaises(RuntimeError, spacer.isEmpty)
def testConstructorProperties(self):
"""PYSIDE-1986, test passing properties to the constructor of
QHBoxLayout, which does not have default arguments."""
layout = QHBoxLayout(objectName="layout", spacing=30)
self.assertEqual(layout.spacing(), 30)
self.assertEqual(layout.objectName(), "layout")
if __name__ == '__main__':
unittest.main()
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