qnode.h - mozsearch

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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QT3DCORE_QNODE_H

#define QT3DCORE_QNODE_H

#include <Qt3DCore/qnodeid.h>

#include <Qt3DCore/qt3dcore_global.h>

#include <QtCore/QObject>

#define Q_NODE_NULLPTR static_cast<Qt3DCore::QNode *>(nullptr)

QT_BEGIN_NAMESPACE

namespace Qt3DCore {

class QNode;

class QNodePrivate;

class QAspectEngine;

#if defined(QT_BUILD_INTERNAL)

class QBackendNodeTester;

#endif

using QNodeVector = QList<QNode *>;

using QNodePtr = QSharedPointer<QNode>;

class Q_3DCORESHARED_EXPORT QNode : public QObject

    Q_OBJECT

    Q_PROPERTY(Qt3DCore::QNode *parent READ parentNode WRITE setParent NOTIFY parentChanged)

    Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)

public:

    explicit QNode(QNode *parent = nullptr);

    virtual ~QNode();

    QNodeId id() const;

    QNode *parentNode() const;

    bool notificationsBlocked() const;

    bool blockNotifications(bool block);

    QNodeVector childNodes() const;

    bool isEnabled() const;

public Q_SLOTS:

    void setParent(QNode *parent);

    void setEnabled(bool isEnabled);

Q_SIGNALS:

    void parentChanged(QObject *parent);

    void enabledChanged(bool enabled);

    void nodeDestroyed();

protected:

    explicit QNode(QNodePrivate &dd, QNode *parent = nullptr);

private:

    Q_DECLARE_PRIVATE(QNode)

    // We only want setParent(QNode *) to be callable

    // when dealing with QNode objects

    void setParent(QObject *) = delete;

    Q_PRIVATE_SLOT(d_func(), void _q_postConstructorInit())

    Q_PRIVATE_SLOT(d_func(), void _q_addChild(Qt3DCore::QNode *))

    Q_PRIVATE_SLOT(d_func(), void _q_removeChild(Qt3DCore::QNode *))

    Q_PRIVATE_SLOT(d_func(), void _q_setParentHelper(Qt3DCore::QNode *))

    friend class QAspectEngine;

    friend class QAspectEnginePrivate;

    friend class QAbstractAspectPrivate;

    friend class QScene;

#if defined(QT_BUILD_INTERNAL)

    friend class QBackendNodeTester;

#endif

};

inline QNodeId qIdForNode(QNode *node){ return node ? node->id() : QNodeId(); }

template<typename T>

inline QNodeIdVector qIdsForNodes(const T &nodes)

    QNodeIdVector ids;

    ids.reserve(nodes.size());

    for (const auto n : nodes)

        ids.push_back(n->id());

    return ids;

struct QNodeIdTypePair

    QNodeIdTypePair() noexcept

        : id()

        , type(nullptr)

{}

    explicit QNodeIdTypePair(QNodeId _id, const QMetaObject *_type) noexcept

        : id(_id)

        , type(_type)

{}

    QNodeId id;

    const QMetaObject *type;

};

QT3D_DECLARE_TYPEINFO(Qt3DCore, QNodeIdTypePair, Q_PRIMITIVE_TYPE)

} // namespace Qt3DCore

QT_END_NAMESPACE

#endif