phonon/phonon/qsettingsgroup_p.h

0001 /*  This file is part of the KDE project
0002     Copyright (C) 2007 Matthias Kretz <kretz@kde.org>
0003
0004     This library is free software; you can redistribute it and/or
0005     modify it under the terms of the GNU Lesser General Public
0006     License as published by the Free Software Foundation; either
0007     version 2.1 of the License, or (at your option) version 3, or any
0008     later version accepted by the membership of KDE e.V. (or its
0009     successor approved by the membership of KDE e.V.), Nokia Corporation
0010     (or its successors, if any) and the KDE Free Qt Foundation, which shall
0011     act as a proxy defined in Section 6 of version 3 of the license.
0012
0013     This library is distributed in the hope that it will be useful,
0014     but WITHOUT ANY WARRANTY; without even the implied warranty of
0015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0016     Lesser General Public License for more details.
0017
0018     You should have received a copy of the GNU Lesser General Public
0019     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
0020
0021 */
0022
0023 #ifndef PHONON_QSETTINGSGROUP_P_H
0024 #define PHONON_QSETTINGSGROUP_P_H
0025
0026 #include <QSettings>
0027 #include <QString>
0028 #include <QVariant>
0029
0030 #ifndef QT_NO_PHONON_SETTINGSGROUP
0031
0032
0033 namespace Phonon
0034 {
0035 class QSettingsGroup
0036 {
0037     public:
0038         inline QSettingsGroup(QSettings *settings, const QString &name)
0039             : m_mutableSettings(settings),
0040             m_settings(settings),
0041             m_group(name + QLatin1Char('/'))
0042         {
0043         }
0044
0045         inline QSettingsGroup(const QSettings *settings, const QString &name)
0046             : m_mutableSettings(nullptr),
0047             m_settings(settings),
0048             m_group(name + QLatin1Char('/'))
0049         {
0050         }
0051
0052         template<typename T>
0053         inline T value(const QString &key, const T &def) const
0054         {
0055             return qvariant_cast<T>(value(key, QVariant::fromValue<T>(def)));
0056         }
0057
0058         inline QVariant value(const QString &key, const QVariant &def) const
0059         {
0060             return m_settings->value(m_group + key, def);
0061         }
0062
0063         template<typename T>
0064         inline void setValue(const QString &key, const T &value)
0065         {
0066             Q_ASSERT(m_mutableSettings);
0067             m_mutableSettings->setValue(m_group + key, QVariant::fromValue<T>(value));
0068         }
0069
0070         inline void removeEntry(const QString &key)
0071         {
0072             Q_ASSERT(m_mutableSettings);
0073             m_mutableSettings->remove(m_group + key);
0074         }
0075
0076         inline bool hasKey(const QString &key) const
0077         {
0078             return m_settings->contains(m_group + key);
0079         }
0080
0081     private:
0082         QSettings *const m_mutableSettings;
0083         const QSettings *const m_settings;
0084         QString m_group;
0085 };
0086 } // namespace Phonon
0087
0088 #endif //QT_NO_PHONON_SETTINGSGROUP
0089
0090 #endif // PHONON_QSETTINGSGROUP_P_H