Add sendParentChangeNotification to QGraphicsItem

Fixes crash in creator. If flag is true notifications are sent. It is important
that positioners work correctly and don't leak.

Reviewed-By: Alexis Menard
(cherry picked from commit 3b43389b78925ce87d660c343c925fa280b91e11)

2 files changed, 16 insertions, 4 deletions

diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index b404692..3b18c31 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -7669,7 +7669,12 @@ void QGraphicsObject::updateMicroFocus()
 
 void QGraphicsItemPrivate::children_append(QDeclarativeListProperty<QGraphicsObject> *list, QGraphicsObject *item)
 {
-    QGraphicsItemPrivate::get(item)->setParentItemHelper(static_cast<QGraphicsObject *>(list->object), /*newParentVariant=*/0, /*thisPointerVariant=*/0);
+    QGraphicsObject *graphicsObject = static_cast<QGraphicsObject *>(list->object);
+    if (QGraphicsItemPrivate::get(graphicsObject)->sendParentChangeNotification) {
+        item->setParentItem(graphicsObject);
+    } else {
+        QGraphicsItemPrivate::get(item)->setParentItemHelper(graphicsObject, 0, 0);
+    }
 }
 
 int QGraphicsItemPrivate::children_count(QDeclarativeListProperty<QGraphicsObject> *list)
@@ -7691,8 +7696,13 @@ void QGraphicsItemPrivate::children_clear(QDeclarativeListProperty<QGraphicsObje
 {
     QGraphicsItemPrivate *d = QGraphicsItemPrivate::get(static_cast<QGraphicsObject *>(list->object));
     int childCount = d->children.count();
-    for (int index = 0; index < childCount; index++)
-        QGraphicsItemPrivate::get(d->children.at(0))->setParentItemHelper(0, /*newParentVariant=*/0, /*thisPointerVariant=*/0);
+    if (d->sendParentChangeNotification) {
+        for (int index = 0; index < childCount; index++)
+            d->children.at(0)->setParentItem(0);
+    } else {
+        for (int index = 0; index < childCount; index++)
+            QGraphicsItemPrivate::get(d->children.at(0))->setParentItemHelper(0, 0, 0);
+    }
 }
 
 /*!
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index 77e4054..c8a7699 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -238,6 +238,7 @@ public:
         pendingPolish(0),
         mayHaveChildWithGraphicsEffect(0),
         isDeclarativeItem(0),
+        sendParentChangeNotification(0),
         globalStackingOrder(-1),
         q_ptr(0)
     {
@@ -584,7 +585,8 @@ public:
     quint32 pendingPolish : 1;
     quint32 mayHaveChildWithGraphicsEffect : 1;
     quint32 isDeclarativeItem : 1;
-    quint32 padding : 23;
+    quint32 sendParentChangeNotification : 1;
+    quint32 padding : 22;
 
     // Optional stacking order
     int globalStackingOrder;