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151 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2004-06-15
* Description : Albums manager interface.
*
* SPDX-FileCopyrightText: 2006-2026 by Gilles Caulier <caulier dot gilles at gmail dot com>
* SPDX-FileCopyrightText: 2006-2011 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#pragma once
// Qt includes
#include <QList>
// Local includes
#include "album.h"
#include "albummanager.h"
namespace Digikam
{
/**
* You can use AlbumPointer to store a guarded pointer to Album
* or one of the subclasses (use template parameter).
* The pointer will be set to 0 when the album object is deleted.
*/
template <class T = Album>
class AlbumPointer
{
public:
AlbumPointer() = default;
// cppcheck-suppress noExplicitConstructor
AlbumPointer(T* const a) // krazy:exclude=explicit<--- Class 'AlbumPointer < DAlbum >' has a constructor with 1 argument that is not explicit. [+]Class 'AlbumPointer < DAlbum >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Class 'AlbumPointer < Album >' has a constructor with 1 argument that is not explicit. [+]Class 'AlbumPointer < Album >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Class 'AlbumPointer' has a constructor with 1 argument that is not explicit. [+]Class 'AlbumPointer' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions.
: album(a)
{
AlbumManager::instance()->addGuardedPointer(album, &album);
}
// cppcheck-suppress noExplicitConstructor
AlbumPointer(const AlbumPointer<T>& p) // krazy:exclude=explicit
: album(p.album)
{
AlbumManager::instance()->addGuardedPointer(album, &album);
}
~AlbumPointer()
{
AlbumManager::instance()->removeGuardedPointer(album, &album);
}
AlbumPointer<T>& operator=(T* const a)
{
Album* const oldAlbum = album;
album = a;
AlbumManager::instance()->changeGuardedPointer(oldAlbum, album, &album);
return *this;
}
AlbumPointer<T>& operator=(const AlbumPointer<T>& p)
{
Album* const oldAlbum = album;
album = p.album;
AlbumManager::instance()->changeGuardedPointer(oldAlbum, album, &album);
return *this;
}
T* operator->() const
{
return static_cast<T*>(const_cast<Album*>(album));
}
T& operator*() const
{
return *static_cast<T*>(const_cast<Album*>(album));
}
operator T* () const
{
return static_cast<T*>(const_cast<Album*>(album));
}
bool operator!() const
{
return !album;
}
private:
Album* album = nullptr;
friend class AlbumManager;
};
// ------------------------------------------------------------------------------------
template <class T = Album>
class AlbumPointerList : public QList<AlbumPointer<T> >
{
public:
AlbumPointerList() = default;
~AlbumPointerList() = default;
explicit AlbumPointerList(const AlbumPointerList<T>& list)
: QList<AlbumPointer<T> >(list)
{
}
explicit AlbumPointerList(const QList<T*>& list)
{
operator=(list);
}
// cppcheck-suppress operatorEqRetRefThis
AlbumPointerList<T>& operator=(const AlbumPointerList<T>& list)<--- 'operator=' should return reference to 'this' instance.
{
return QList<AlbumPointer<T> >::operator=(list);
}
AlbumPointerList<T>& operator=(const QList<T*>& list)
{
for (T* const t : std::as_const(list))
{
this->append(AlbumPointer<T>(t));
}
return *this;
}
};
} // namespace Digikam
Q_DECLARE_METATYPE(Digikam::AlbumPointer<>)
Q_DECLARE_METATYPE(Digikam::AlbumPointer<Digikam::PAlbum>)
Q_DECLARE_METATYPE(Digikam::AlbumPointer<Digikam::TAlbum>)
Q_DECLARE_METATYPE(Digikam::AlbumPointer<Digikam::SAlbum>)
Q_DECLARE_METATYPE(Digikam::AlbumPointer<Digikam::DAlbum>)
|