ChangeArbiter/SceneChange: use id as change subject

Instead of having a QNode* or QObservable as the subject of a change, we use
it's unique NodeId instead. That will prevent the ChangeArbiter from trying to
distribute changes by looking at a QNode/QObservable id when the
QNode/QObservable might have been destroyed in the meantime.

Change-Id: Ia419d5b841434fd65522c8c65de552089cfe97cf
Task-number: QTBUG-44628
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/render/frontend/qparameter.cpp b/src/render/frontend/qparameter.cpp
index 5ecf24092..9a1ec67c5 100644
--- a/src/render/frontend/qparameter.cpp
+++ b/src/render/frontend/qparameter.cpp
@@ -117,7 +117,7 @@ void QParameter::setValue(const QVariant &dv)
         if (txt != Q_NULLPTR && !txt->parent())
            txt->setParent(this);
 
-        QScenePropertyChangePtr change(new QScenePropertyChange(NodeUpdated, this));
+        QScenePropertyChangePtr change(new QScenePropertyChange(NodeUpdated, QSceneChange::Node, id()));
         change->setPropertyName(d->m_name.toUtf8().data());
         if (txt != Q_NULLPTR)
             change->setValue(QVariant::fromValue(QNode::clone(txt)));