1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2017 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtLocation module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL3$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPLv3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or later as published by the Free 28 ** Software Foundation and appearing in the file LICENSE.GPL included in 29 ** the packaging of this file. Please review the following information to 30 ** ensure the GNU General Public License version 2.0 requirements will be 31 ** met: http://www.gnu.org/licenses/gpl-2.0.html. 32 ** 33 ** $QT_END_LICENSE$ 34 ** 35 ****************************************************************************/ 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