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66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*
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* autoqpointer.h - QPointer which on destruction deletes object
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* This is a (mostly) verbatim, private copy of kdepim/kalarm/lib/autoqpointer.h
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*
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* Copyright © 2009 by David Jarvie <djarvie@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef MESSAGEVIEWER_AUTOQPOINTER_H
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#define MESSAGEVIEWER_AUTOQPOINTER_H
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#include <QPointer>
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#include <QObject>
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#include <kdemacros.h>
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namespace MessageViewer {
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/**
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* A QPointer which when destructed, deletes the object it points to.
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*
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* @author David Jarvie <djarvie@kde.org>, Marc Mutz <mutz@kde.org>
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*/
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template <class T>
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class AutoQPointer
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{
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Q_DISABLE_COPY( AutoQPointer )
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struct SafeBool { void func() {} };
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typedef void (SafeBool::*save_bool)();
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QPointer<QObject> o;
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public:
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AutoQPointer() : o() {}
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explicit AutoQPointer( T * p ) : o(p) {}
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~AutoQPointer() { delete o; }
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T * data() const { return static_cast<T*>(o.data()); }
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T * get() const { return data(); }
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bool isNull() const { return o.isNull(); }
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T * operator->() const { return data(); }
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T & operator*() const { return *data(); }
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#if 0 // enable when all users of operator T*() have been converted to use .get()
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operator save_bool() const { return isNull() ? 0 : &SafeBool::func ; }
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#else
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// unsafe - use explicit .get()
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KDE_DEPRECATED operator T*() const { return get(); }
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// unsafe - only provided to prevent the above warning in bool contexts
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operator bool() const { return get(); }
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#endif
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};
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}
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#endif // MESSAGEVIEWER_AUTOQPOINTER_H
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