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Diffstat (limited to 'qtinterface/qt4/Qt/qpointer.h')
| -rw-r--r-- | qtinterface/qt4/Qt/qpointer.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/qtinterface/qt4/Qt/qpointer.h b/qtinterface/qt4/Qt/qpointer.h new file mode 100644 index 0000000..65270ab --- /dev/null +++ b/qtinterface/qt4/Qt/qpointer.h @@ -0,0 +1,168 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation ([email protected]) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial Usage +** Licensees holding valid Qt Commercial licenses may use this file in +** accordance with the Qt Commercial License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Nokia. +** +** 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 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at [email protected]. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QPOINTER_H +#define QPOINTER_H + +#include <QtCore/qobject.h> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(Core) + +template <class T> +class QPointer +{ + QObject *o; +public: + inline QPointer() : o(0) {} + inline QPointer(T *p) : o(p) + { QMetaObject::addGuard(&o); } + inline QPointer(const QPointer<T> &p) : o(p.o) + { QMetaObject::addGuard(&o); } + inline ~QPointer() + { QMetaObject::removeGuard(&o); } + inline QPointer<T> &operator=(const QPointer<T> &p) + { if (this != &p) QMetaObject::changeGuard(&o, p.o); return *this; } + inline QPointer<T> &operator=(T* p) + { if (o != p) QMetaObject::changeGuard(&o, p); return *this; } + + 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)); } +}; + + +#if (!defined(Q_CC_SUN) || (__SUNPRO_CC >= 0x580)) // ambiguity between const T * and T * + +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; } + +#else + +template<class T> +inline bool operator==(const void *o, const QPointer<T> &p) +{ return o == p.operator->(); } + +template<class T> +inline bool operator==(const QPointer<T> &p, const void *o) +{ return p.operator->() == o; } + +#endif + +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->(); } + + +#if (!defined(Q_CC_SUN) || (__SUNPRO_CC >= 0x580)) // ambiguity between const T * and T * + +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; } + +#else + +template<class T> +inline bool operator!= (const void *o, const QPointer<T> &p) +{ return o != p.operator->(); } + +template<class T> +inline bool operator!= (const QPointer<T> &p, const void *o) +{ return p.operator->() != o; } + +#endif + +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->() ; } + +// Make MSVC < 1400 (2005) handle "if (NULL == p)" syntax +#if defined(Q_CC_MSVC) && (_MSC_VER < 1400) +template<class T> +inline bool operator== (int i, const QPointer<T> &p) +{ Q_ASSERT(i == 0); return !i && p.isNull(); } + +template<class T> +inline bool operator!= (int i, const QPointer<T> &p) +{ Q_ASSERT(i == 0); return !i && !p.isNull(); } +#endif + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QPOINTER_H |