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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
from __future__ import annotations
import gc
import os
import sys
import unittest
import weakref
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 PySide6.QtCore import Qt
from PySide6.QtWidgets import QDialog, QLabel, QGridLayout, QHBoxLayout, QWidget
from helper.timedqapplication import TimedQApplication
class LabelWindow(QDialog):
def __init__(self, parent):
super().__init__(parent)
self.test_layout = QGridLayout()
label = QLabel("Label")
self.test_layout.addWidget(label, 0, 0)
self.setLayout(self.test_layout)
self._destroyCalled = False
def replace(self, unit):
old_item = self.test_layout.itemAtPosition(0, 0)
old_label = old_item.widget()
ref = weakref.ref(old_item, self._destroyed) # noqa: F841
self.test_layout.removeWidget(old_label)
unit.assertRaises(RuntimeError, old_item.widget)
del old_item
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
label = QLabel("Label New")
old_label.deleteLater()
label.setAlignment(Qt.AlignmentFlag.AlignCenter)
self.test_layout.addWidget(label, 0, 0)
def _destroyed(self, obj):
self._destroyCalled = True
class TestBug1006 (TimedQApplication):
def testLayoutItemLifeTime(self):
window = LabelWindow(None)
window.replace(self)
self.assertTrue(window._destroyCalled)
self.app.exec()
def testParentLayout(self):
def createLayout():
label = QLabel()
layout = QHBoxLayout()
layout.addWidget(label)
widget = QWidget()
widget.setLayout(layout)
return (layout, widget)
(layout, widget) = createLayout()
item = layout.itemAt(0)
self.assertTrue(isinstance(item.widget(), QWidget))
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testRemoveOrphanWidget(self):
widget = QLabel()
layout = QHBoxLayout()
layout.addWidget(widget)
self.assertEqual(sys.getrefcount(widget), 3)
layout.removeWidget(widget)
widget.setObjectName("MyWidget")
self.assertEqual(sys.getrefcount(widget), 2)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testRemoveChildWidget(self):
parent = QLabel()
widget = QLabel(parent)
self.assertEqual(sys.getrefcount(widget), 3)
layout = QHBoxLayout()
layout.addWidget(widget)
self.assertEqual(sys.getrefcount(widget), 3)
layout.removeWidget(widget)
widget.setObjectName("MyWidget")
self.assertEqual(sys.getrefcount(widget), 3)
if __name__ == "__main__":
unittest.main()
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