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36 
37 #ifndef QPARAMETERIZABLEOBJECT_H
38 #define QPARAMETERIZABLEOBJECT_H
39 
40 //
41 //  W A R N I N G
42 //  -------------
43 //
44 // This file is not part of the Qt API.  It exists purely as an
45 // implementation detail.  This header file may change from version to
46 // version without notice, or even be removed.
47 //
48 // We mean it.
49 //
50 
51 #include <QtLocation/private/qlocationglobal_p.h>
52 #include <QObject>
53 #include <QQmlListProperty>
54 #include <QQmlParserStatus>
55 
56 QT_BEGIN_NAMESPACE
57 class QGeoMapParameter;
58 class Q_LOCATION_PRIVATE_EXPORT QParameterizableObject : public QObject
59 {
60     Q_OBJECT
61     Q_PROPERTY(QObject *parent READ parent NOTIFY parentChanged DESIGNABLE false FINAL)
62     Q_PROPERTY(QQmlListProperty<QObject> quickChildren READ declarativeChildren DESIGNABLE false)
63     Q_CLASSINFO("DefaultProperty", "quickChildren")
64 
65 public:
66     explicit QParameterizableObject(QObject *parent = nullptr);
67 
68     template <typename T = QObject>
quickChildren()69     QList<T*> quickChildren() const
70     {
71         QList<T*> res;
72         for (auto kid : qAsConst(m_children)) {
73             auto val = qobject_cast<T*>(kid);
74             if (val)
75                 res.push_back(val);
76         }
77         return res;
78     }
79 
80 Q_SIGNALS:
81     void parentChanged();
82 
83 protected:
84     virtual void appendChild(QObject *v);
85     virtual void clearChildren();
86 
87     static void append(QQmlListProperty<QObject> *p, QObject *v);
88     static int count(QQmlListProperty<QObject> *p);
89     static QObject *at(QQmlListProperty<QObject> *p, int idx);
90     static void clear(QQmlListProperty<QObject> *p);
91 
92     QQmlListProperty<QObject> declarativeChildren();
93     QList<QObject*> m_children;
94 };
95 QT_END_NAMESPACE
96 
97 #endif // QPARAMETERIZABLEOBJECT_H
98