| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** This file may be used under the terms of the GNU Lesser General Public |
| ** License version 2.1 as published by the Free Software Foundation and |
| ** appearing in the file LICENSE.LGPL included in the packaging of this |
| ** file. Please review the following information to ensure the GNU Lesser |
| ** General Public License version 2.1 requirements will be met: |
| ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
| ** |
| ** In addition, as a special exception, Nokia gives you certain additional |
| ** rights. These rights are described in the Nokia Qt LGPL Exception |
| ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU General |
| ** Public License version 3.0 as published by the Free Software Foundation |
| ** and appearing in the file LICENSE.GPL included in the packaging of this |
| ** file. Please review the following information to ensure the GNU General |
| ** Public License version 3.0 requirements will be met: |
| ** http://www.gnu.org/copyleft/gpl.html. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
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| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QDECLARATIVEGUARD_P_H |
| #define QDECLARATIVEGUARD_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp. This header |
| // file may change from version to version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/qglobal.h> |
| #include <QtCore/qvariant.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QObject; |
| template<class T> |
| class QDeclarativeGuard |
| { |
| QObject *o; |
| QDeclarativeGuard<QObject> *next; |
| QDeclarativeGuard<QObject> **prev; |
| friend class QDeclarativeData; |
| public: |
| inline QDeclarativeGuard(); |
| inline QDeclarativeGuard(T *); |
| inline QDeclarativeGuard(const QDeclarativeGuard<T> &); |
| inline virtual ~QDeclarativeGuard(); |
| |
| inline QDeclarativeGuard<T> &operator=(const QDeclarativeGuard<T> &o); |
| inline QDeclarativeGuard<T> &operator=(T *); |
| |
| inline bool isNull() const |
| { return !o; } |
| |
| inline T* operator->() const |
| { return static_cast<T*>(const_cast<QObject*>(o)); } |
| inline T& operator*() const |
| { return *static_cast<T*>(const_cast<QObject*>(o)); } |
| inline operator T*() const |
| { return static_cast<T*>(const_cast<QObject*>(o)); } |
| inline T* data() const |
| { return static_cast<T*>(const_cast<QObject*>(o)); } |
| |
| protected: |
| virtual void objectDestroyed(T *) {} |
| |
| private: |
| inline void addGuard(); |
| inline void remGuard(); |
| }; |
| |
| QT_END_NAMESPACE |
| |
| Q_DECLARE_METATYPE(QDeclarativeGuard<QObject>) |
| |
| #include "private/qdeclarativedata_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| template<class T> |
| QDeclarativeGuard<T>::QDeclarativeGuard() |
| : o(0), next(0), prev(0) |
| { |
| } |
| |
| template<class T> |
| QDeclarativeGuard<T>::QDeclarativeGuard(T *g) |
| : o(g), next(0), prev(0) |
| { |
| if (o) addGuard(); |
| } |
| |
| template<class T> |
| QDeclarativeGuard<T>::QDeclarativeGuard(const QDeclarativeGuard<T> &g) |
| : o(g.o), next(0), prev(0) |
| { |
| if (o) addGuard(); |
| } |
| |
| template<class T> |
| QDeclarativeGuard<T>::~QDeclarativeGuard() |
| { |
| if (prev) remGuard(); |
| o = 0; |
| } |
| |
| template<class T> |
| QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(const QDeclarativeGuard<T> &g) |
| { |
| if (g.o != o) { |
| if (prev) remGuard(); |
| o = g.o; |
| if (o) addGuard(); |
| } |
| return *this; |
| } |
| |
| template<class T> |
| QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(T *g) |
| { |
| if (g != o) { |
| if (prev) remGuard(); |
| o = g; |
| if (o) addGuard(); |
| } |
| return *this; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QDECLARATIVEGUARD_P_H |