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42 #ifndef QDECLARATIVEGUARD_P_H
43 #define QDECLARATIVEGUARD_P_H
49 // This file is not part of the Qt API. It exists for the convenience
50 // of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp. This header
51 // file may change from version to version without notice, or even be removed.
56 #include <QtCore/qglobal.h>
57 #include <QtCore/qvariant.h>
63 class QDeclarativeGuard
66 QDeclarativeGuard<QObject> *next;
67 QDeclarativeGuard<QObject> **prev;
68 friend class QDeclarativeData;
70 inline QDeclarativeGuard();
71 inline QDeclarativeGuard(T *);
72 inline QDeclarativeGuard(const QDeclarativeGuard<T> &);
73 inline virtual ~QDeclarativeGuard();
75 inline QDeclarativeGuard<T> &operator=(const QDeclarativeGuard<T> &o);
76 inline QDeclarativeGuard<T> &operator=(T *);
78 inline bool isNull() const
81 inline T* operator->() const
82 { return static_cast<T*>(const_cast<QObject*>(o)); }
83 inline T& operator*() const
84 { return *static_cast<T*>(const_cast<QObject*>(o)); }
85 inline operator T*() const
86 { return static_cast<T*>(const_cast<QObject*>(o)); }
87 inline T* data() const
88 { return static_cast<T*>(const_cast<QObject*>(o)); }
91 virtual void objectDestroyed(T *) {}
94 inline void addGuard();
95 inline void remGuard();
100 Q_DECLARE_METATYPE(QDeclarativeGuard<QObject>)
102 #include "private/qdeclarativedata_p.h"
107 QDeclarativeGuard<T>::QDeclarativeGuard()
108 : o(0), next(0), prev(0)
113 QDeclarativeGuard<T>::QDeclarativeGuard(T *g)
114 : o(g), next(0), prev(0)
120 QDeclarativeGuard<T>::QDeclarativeGuard(const QDeclarativeGuard<T> &g)
121 : o(g.o), next(0), prev(0)
127 QDeclarativeGuard<T>::~QDeclarativeGuard()
129 if (prev) remGuard();
134 QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(const QDeclarativeGuard<T> &g)
137 if (prev) remGuard();
145 QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(T *g)
148 if (prev) remGuard();
157 #endif // QDECLARATIVEGUARD_P_H