Lazy Load: Fix polymorphic classes by identifying lazy groups

Classes with a polymorphicIdValue have an expression which
may reference a related class. We use that to identify
a lazy group, which has to be initialized at once.

This is now completely solved.

Pick-to: 6.7
Fixes: PYSIDE-2675
Change-Id: I957a1b2b95d37b96cc2e98082fc7f92e601322cb
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 16 insertions, 0 deletions

diff --git a/sources/pyside6/tests/QtCore/qobject_event_filter_test.py b/sources/pyside6/tests/QtCore/qobject_event_filter_test.py
index 1cf07fbab..ab7a1b6ad 100644
--- a/sources/pyside6/tests/QtCore/qobject_event_filter_test.py
+++ b/sources/pyside6/tests/QtCore/qobject_event_filter_test.py
@@ -63,6 +63,17 @@ class FilteredObject(QObject):
             self.app.quit()
 
 
+class PolymorphicIdFilterObject(QObject):
+    """PYSIDE-2675: Check whether QChildEvent.added() is accessible via PolymorphicId"""
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.added = False
+
+    def event(self, event):
+        self.added = event.added()
+        return False
+
+
 class TestQObjectEventFilterPython(UsesQApplication):
     '''QObject.eventFilter - Reimplemented in python
     Filters 5 TimerEvents and then bypasses the other events to the
@@ -93,6 +104,11 @@ class TestQObjectEventFilterPython(UsesQApplication):
         self.assertEqual(filtered.times_called, 5)
         self.assertEqual(self.obj_filter.events_handled, 5)
 
+    def testPolymorphicId(self):
+        testObject = PolymorphicIdFilterObject()
+        t2 = QObject(testObject)  # noqa: F841
+        self.assertTrue(testObject.added)
+
     @unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
     def testInstallEventFilterRefCountAfterDelete(self):
         '''Bug 910 - installEventFilter() increments reference count on target object