qquickattachedpropertypropagator_p.h

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// Copyright (C) 2025 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 QQUICKATTACHEDPROPERTYPROPAGATOR_P_H

#define QQUICKATTACHEDPROPERTYPROPAGATOR_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 <QtCore/qobject.h>

#include <QtCore/qloggingcategory.h>

#include <QtQuick/qtquickexports.h>

QT_BEGIN_NAMESPACE

QT_DECLARE_EXPORTED_QT_LOGGING_CATEGORY(lcAttachedPropertyPropagator, Q_QUICK_EXPORT)

// This type is a copy of the type of the same name from Controls.

// It exists here because QQuickContextMenu needs to derive from it,

// but that type is in Templates, which can't depend on Controls.

// This allows us to use the same name as the type in Controls.

namespace QtPrivate {

class QQuickAttachedPropertyPropagatorPrivate;

class Q_QUICK_EXPORT QQuickAttachedPropertyPropagator : public QObject

    Q_OBJECT

public:

    explicit QQuickAttachedPropertyPropagator(QObject *parent = nullptr);

    ~QQuickAttachedPropertyPropagator();

    QList<QQuickAttachedPropertyPropagator *> attachedChildren() const;

    QQuickAttachedPropertyPropagator *attachedParent() const;

    static QQuickAttachedPropertyPropagator *attachedObject(const QMetaObject *attachedType,

        QObject *attachee, bool create = false);

    static QQuickAttachedPropertyPropagator *fallbackAttachedObject(

        const QMetaObject *attachedType, QObject *attachee);

protected:

    QQuickAttachedPropertyPropagator(QQuickAttachedPropertyPropagatorPrivate &dd, QObject *parent);

    void initialize();

    virtual void attachedParentChange(QQuickAttachedPropertyPropagator *newParent,

        QQuickAttachedPropertyPropagator *oldParent);

private:

#ifndef QT_NO_DEBUG_STREAM

    friend Q_QUICK_EXPORT QDebug operator<<(QDebug debug,

        const QQuickAttachedPropertyPropagator *propagator);

#endif

    Q_DECLARE_PRIVATE(QQuickAttachedPropertyPropagator)

};

} // namespace QtPrivate

QT_END_NAMESPACE

#endif // QQUICKATTACHEDPROPERTYPROPAGATOR_P_H