| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL21$ |
| ** Commercial License Usage |
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| ** accordance with the commercial license agreement provided with the |
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| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 2.1 or version 3 as published by the Free |
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| ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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| ****************************************************************************/ |
| |
| #ifndef QPOINTER_H |
| #define QPOINTER_H |
| |
| #include <QtCore/qsharedpointer.h> |
| |
| #ifndef QT_NO_QOBJECT |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QVariant; |
| |
| template <class T> |
| class QPointer |
| { |
| template<typename U> |
| struct TypeSelector |
| { |
| typedef QObject Type; |
| }; |
| template<typename U> |
| struct TypeSelector<const U> |
| { |
| typedef const QObject Type; |
| }; |
| typedef typename TypeSelector<T>::Type QObjectType; |
| QWeakPointer<QObjectType> wp; |
| public: |
| inline QPointer() { } |
| inline QPointer(T *p) : wp(p, true) { } |
| // compiler-generated copy/move ctor/assignment operators are fine! |
| inline ~QPointer() { } |
| |
| inline QPointer<T> &operator=(T* p) |
| { wp.assign(static_cast<QObjectType*>(p)); return *this; } |
| |
| inline T* data() const |
| { return static_cast<T*>( wp.data()); } |
| inline T* operator->() const |
| { return data(); } |
| inline T& operator*() const |
| { return *data(); } |
| inline operator T*() const |
| { return data(); } |
| |
| inline bool isNull() const |
| { return wp.isNull(); } |
| |
| inline void clear() |
| { wp.clear(); } |
| }; |
| template <class T> Q_DECLARE_TYPEINFO_BODY(QPointer<T>, Q_MOVABLE_TYPE); |
| |
| template <class T> |
| inline bool operator==(const T *o, const QPointer<T> &p) |
| { return o == p.operator->(); } |
| |
| template<class T> |
| inline bool operator==(const QPointer<T> &p, const T *o) |
| { return p.operator->() == o; } |
| |
| template <class T> |
| inline bool operator==(T *o, const QPointer<T> &p) |
| { return o == p.operator->(); } |
| |
| template<class T> |
| inline bool operator==(const QPointer<T> &p, T *o) |
| { return p.operator->() == o; } |
| |
| template<class T> |
| inline bool operator==(const QPointer<T> &p1, const QPointer<T> &p2) |
| { return p1.operator->() == p2.operator->(); } |
| |
| template <class T> |
| inline bool operator!=(const T *o, const QPointer<T> &p) |
| { return o != p.operator->(); } |
| |
| template<class T> |
| inline bool operator!= (const QPointer<T> &p, const T *o) |
| { return p.operator->() != o; } |
| |
| template <class T> |
| inline bool operator!=(T *o, const QPointer<T> &p) |
| { return o != p.operator->(); } |
| |
| template<class T> |
| inline bool operator!= (const QPointer<T> &p, T *o) |
| { return p.operator->() != o; } |
| |
| template<class T> |
| inline bool operator!= (const QPointer<T> &p1, const QPointer<T> &p2) |
| { return p1.operator->() != p2.operator->() ; } |
| |
| template<typename T> |
| QPointer<T> |
| qPointerFromVariant(const QVariant &variant) |
| { |
| return QPointer<T>(qobject_cast<T*>(QtSharedPointer::weakPointerFromVariant_internal(variant).data())); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT_NO_QOBJECT |
| |
| #endif // QPOINTER_H |