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** GNU General Public License Usage | |
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** file. Please review the following information to ensure the GNU General | |
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#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 |