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#ifndef QT3DCORE_QNODECREATEDCHANGEGENERATOR_H
#define QT3DCORE_QNODECREATEDCHANGEGENERATOR_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <Qt3DCore/qnode.h>
#include <Qt3DCore/qnodecreatedchange.h>
#include <Qt3DCore/qt3dcore_global.h>
#include <QtCore/qvector.h>

#include <Qt3DCore/private/qnode_p.h>

QT_BEGIN_NAMESPACE

namespace Qt3DCore {

class QT3DCORE_PRIVATE_EXPORT QNodeCreatedChangeGenerator
{
public:
    QNodeCreatedChangeGenerator(QNode *rootNode);

    QVector<QNodeCreatedChangeBasePtr> creationChanges() const { return m_creationChanges; }

private:
    void createCreationChange(QNode *node)
    {
        const auto creationChange = node->createNodeCreationChange();
        m_creationChanges.push_back(creationChange);

        // Store the metaobject of the node in the QNode so that we have it available
        // to us during destruction in the QNode destructor. This allows us to send
        // the QNodeId and the metaobject as typeinfo to the backend aspects so they
        // in turn can find the correct QBackendNodeMapper object to handle the destruction
        // of the corresponding backend nodes.
        QNodePrivate *d = QNodePrivate::get(node);
        d->m_typeInfo = const_cast<QMetaObject*>(creationChange->metaObject());

        // Mark this node as having been handled for creation so that it is picked up
        d->m_hasBackendNode = true;
    }

    QVector<QNodeCreatedChangeBasePtr> m_creationChanges;
};

} // namespace Qt3DCore

QT_END_NAMESPACE

#endif // QT3DCORE_QNODECREATEDCHANGEGENERATOR_H
