1 files changed, 64 insertions, 0 deletions
diff --git a/src/qml/qml/qqmlpropertytopropertybinding_p.h b/src/qml/qml/qqmlpropertytopropertybinding_p.h
new file mode 100644
index 0000000000..d741c5a740
--- /dev/null
+++ b/src/qml/qml/qqmlpropertytopropertybinding_p.h
@@ -0,0 +1,64 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QQMLPROPERTYTOPROPERTYBINDINDING_P_H
+#define QQMLPROPERTYTOPROPERTYBINDINDING_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qqmlabstractbinding_p.h>
+#include <private/qqmlnotifier_p.h>
+#include <QtCore/qproperty.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_QML_EXPORT QQmlPropertyToPropertyBinding
+    : public QQmlAbstractBinding, public QQmlNotifierEndpoint
+{
+public:
+    QQmlPropertyToPropertyBinding(
+            QQmlEngine *engine, QObject *sourceObject, int sourcePropertyIndex,
+            QObject *targetObject, int targetPropertyIndex);
+
+    Kind kind() const final;
+    void setEnabled(bool e, QQmlPropertyData::WriteFlags flags) final;
+
+    void update(QQmlPropertyData::WriteFlags flags = QQmlPropertyData::DontRemoveBinding);
+
+private:
+    static void trigger(QPropertyObserver *, QUntypedPropertyData *);
+
+    void captureProperty(
+            const QMetaObject *sourceMetaObject, int notifyIndex,
+            bool isSourceBindable, bool isTargetBindable);
+
+    struct Observer : QPropertyObserver {
+        static void trigger(QPropertyObserver *observer, QUntypedPropertyData *);
+        Observer(QQmlPropertyToPropertyBinding *binding)
+            : QPropertyObserver(trigger)
+            , binding(binding)
+        {
+        }
+        QQmlPropertyToPropertyBinding *binding = nullptr;
+    };
+
+    std::unique_ptr<Observer> observer;
+    QQmlEngine *m_engine = nullptr;
+    QObject *m_sourceObject = nullptr;
+    int m_sourcePropertyIndex = -1;
+};
+
+void QQmlPropertyGuard_callback(QQmlNotifierEndpoint *e, void **);
+
+QT_END_NAMESPACE
+
+#endif