qt-everywhere-src-5.14.1/qtlocation/src/location/declarativemaps/qparameterizableobject_p.h

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#ifndef QPARAMETERIZABLEOBJECT_H
#define QPARAMETERIZABLEOBJECT_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 <QtLocation/private/qlocationglobal_p.h>
#include <QObject>
#include <QQmlListProperty>
#include <QQmlParserStatus>

QT_BEGIN_NAMESPACE
class QGeoMapParameter;
class Q_LOCATION_PRIVATE_EXPORT QParameterizableObject : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QQmlListProperty<QObject> quickChildren READ declarativeChildren DESIGNABLE false)
    Q_CLASSINFO("DefaultProperty", "quickChildren")

public:
    explicit QParameterizableObject(QObject *parent = nullptr);

    template <typename T = QObject>
    QList<T*> quickChildren() const
    {
        QList<T*> res;
        for (auto kid : qAsConst(m_children)) {
            auto val = qobject_cast<T*>(kid);
            if (val)
                res.push_back(val);
        }
        return res;
    }

protected:
    virtual void appendChild(QObject *v);
    virtual void clearChildren();

    static void append(QQmlListProperty<QObject> *p, QObject *v);
    static int count(QQmlListProperty<QObject> *p);
    static QObject *at(QQmlListProperty<QObject> *p, int idx);
    static void clear(QQmlListProperty<QObject> *p);

    QQmlListProperty<QObject> declarativeChildren();
    QList<QObject*> m_children;
};
QT_END_NAMESPACE

#endif // QPARAMETERIZABLEOBJECT_H