diff options
Diffstat (limited to 'src/corelib/itemmodels/qabstractitemmodel_p.h')
| -rw-r--r-- | src/corelib/itemmodels/qabstractitemmodel_p.h | 90 |
1 files changed, 52 insertions, 38 deletions
diff --git a/src/corelib/itemmodels/qabstractitemmodel_p.h b/src/corelib/itemmodels/qabstractitemmodel_p.h index e8f00975ed..e34dc3262c 100644 --- a/src/corelib/itemmodels/qabstractitemmodel_p.h +++ b/src/corelib/itemmodels/qabstractitemmodel_p.h @@ -1,41 +1,5 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #ifndef QABSTRACTITEMMODEL_P_H #define QABSTRACTITEMMODEL_P_H @@ -157,6 +121,56 @@ public: }; Q_DECLARE_TYPEINFO(QAbstractItemModelPrivate::Change, Q_RELOCATABLE_TYPE); +namespace QtPrivate { + +/*! + \internal + This is a workaround for QTBUG-75172. + + Some predefined model roles are supposed to use certain enum/flag + types (e.g. fetching Qt::TextAlignmentRole is supposed to return a + variant containing a Qt::Alignment object). + + For historical reasons, a plain `int` was used sometimes. This is + surprising to end-users and also sloppy on Qt's part; users were + forced to use `int` rather than the correct datatype. + + This function tries both the "right" type and plain `int`, for a + given QVariant. This fixes the problem (using the correct datatype) + but also keeps compatibility with existing code using `int`. + + ### Qt 7: get rid of this. Always use the correct datatype. +*/ +template <typename T> +T legacyEnumValueFromModelData(const QVariant &data) +{ + static_assert(std::is_enum_v<T>); + if (data.userType() == qMetaTypeId<T>()) { + return data.value<T>(); + } else if (std::is_same_v<std::underlying_type_t<T>, int> || + std::is_same_v<std::underlying_type_t<T>, uint>) { + return T(data.toInt()); + } + + return T(); +} + +template <typename T> +T legacyFlagValueFromModelData(const QVariant &data) +{ + if (data.userType() == qMetaTypeId<T>()) { + return data.value<T>(); + } else if (std::is_same_v<std::underlying_type_t<typename T::enum_type>, int> || + std::is_same_v<std::underlying_type_t<typename T::enum_type>, uint>) { + return T::fromInt(data.toInt()); + } + + return T(); +} + +} // namespace QtPrivate + + QT_END_NAMESPACE #endif // QABSTRACTITEMMODEL_P_H |