qqmlcpponassignment_p.h

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// Copyright (C) 2021 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 QQMLCPPONASSIGNMENT_P_H
#define QQMLCPPONASSIGNMENT_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/qqmlpropertyvalueinterceptor_p.h>
#include <QtQml/qqmlpropertyvaluesource.h>
 
QT_BEGIN_NAMESPACE
 
/*! \internal
 
    Helper class that provides setTarget() functionality for both value
    interceptors and value sources.
 
    Property value sources could be problematic because QQuickAbstractAnimation
    changes access specifier of QQmlPropertyValueSource::setTarget() to private
    (unintentionally?). This API allows to avoid manual casts to base types as
    the C++ compiler would implicitly cast derived classes in this case.
*/
struct Q_QML_EXPORT QQmlCppOnAssignmentHelper
{
    // TODO: in theory, this API might just accept QObject * and int that would
    // give the QMetaProperty. using the meta property, one could create
    // QQmlProperty with a call to QQmlProperty::restore() (if there's an
    // overload that takes QMetaProperty instead of QQmlPropertyData - which is
    // also possible to add by using QQmlPropertyData::load())
    static void set(QQmlPropertyValueInterceptor *interceptor, const QQmlProperty &property);
    static void set(QQmlPropertyValueSource *valueSource, const QQmlProperty &property);
};
 
QT_END_NAMESPACE
 
#endif // QQMLCPPONASSIGNMENT_P_H