QQmlBinding::dependencies: Handle QProperty

The method did not consider QProperty properties, as those do not show
up via the active guards mechanism.
At some point, we probably also want to introduce
QQmlAnyBinding::dependencies, as there are now bindings which do not
derive from QQmlBinding.

Pick-to: 6.2
Change-Id: Ib4b227a440e9494c09d92028f9eaa5ad1e87342f
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/qml/qml/qqmljavascriptexpression.cpp b/src/qml/qml/qqmljavascriptexpression.cpp
index f25fd0795c..b8b34d2071 100644
--- a/src/qml/qml/qqmljavascriptexpression.cpp
+++ b/src/qml/qml/qqmljavascriptexpression.cpp
@@ -537,6 +537,16 @@ void QPropertyChangeTrigger::trigger(QPropertyObserver *observer, QUntypedProper
     This->m_expression->expressionChanged();
 }
 
+QMetaProperty QPropertyChangeTrigger::property() const
+{
+    if (!target)
+        return {};
+    auto const mo = target->metaObject();
+    if (!mo)
+        return {};
+    return mo->property(propertyIndex);
+}
+
 QPropertyChangeTrigger *QQmlJavaScriptExpression::allocatePropertyChangeTrigger(QObject *target, int propertyIndex)
 {
     auto trigger = QQmlEnginePrivate::get(engine())->qPropertyTriggerPool.New( this );