runtime/phonon/kcm/qsettingsgroup_p.h

   1 /*  This file is part of the KDE project
   2     Copyright (C) 2007 Matthias Kretz <kretz@kde.org>
   3
   4     This program is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) version 3.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18
  19 */
  20
  21 #ifndef PHONON_QSETTINGSGROUP_P_H
  22 #define PHONON_QSETTINGSGROUP_P_H
  23
  24 #include <QtCore/QSettings>
  25 #include <QtCore/QString>
  26 #include <QtCore/QVariant>
  27
  28 QT_BEGIN_HEADER
  29 QT_BEGIN_NAMESPACE
  30
  31 namespace Phonon
  32 {
  33 class QSettingsGroup
  34 {
  35     public:
  36         inline QSettingsGroup(QSettings *settings, const QString &name)
  37             : m_mutableSettings(settings),
  38             m_settings(settings),
  39             m_group(name + QLatin1Char('/'))
  40         {
  41         }
  42
  43         inline QSettingsGroup(const QSettings *settings, const QString &name)
  44             : m_mutableSettings(0),
  45             m_settings(settings),
  46             m_group(name + QLatin1Char('/'))
  47         {
  48         }
  49
  50         template<typename T>
  51         inline T value(const QString &key, const T &def) const
  52         {
  53             return qvariant_cast<T>(value(key, qVariantFromValue(def)));
  54         }
  55
  56         inline QVariant value(const QString &key, const QVariant &def) const
  57         {
  58             return m_settings->value(m_group + key, def);
  59         }
  60
  61         template<typename T>
  62         inline void setValue(const QString &key, const T &value)
  63         {
  64             Q_ASSERT(m_mutableSettings);
  65             m_mutableSettings->setValue(m_group + key, qVariantFromValue(value));
  66         }
  67
  68         inline void removeEntry(const QString &key)
  69         {
  70             Q_ASSERT(m_mutableSettings);
  71             m_mutableSettings->remove(m_group + key);
  72         }
  73
  74         bool hasKey(const QString &key) const
  75         {
  76             return m_settings->contains(m_group + key);
  77         }
  78
  79     private:
  80         QSettings *const m_mutableSettings;
  81         const QSettings *const m_settings;
  82         QString m_group;
  83 };
  84 } // namespace Phonon
  85
  86 QT_END_NAMESPACE
  87 QT_END_HEADER
  88
  89 #endif // PHONON_QSETTINGSGROUP_P_H