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+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SETTING_H
+#define SETTING_H
+
+#include <QObject>
+#include <QVariant>
+
+#include "libsettings_config.h"
+
+class SettingsObject;
+
+/*!
+ *
+ */
+class LIBMMCSETTINGS_EXPORT Setting : public QObject
+{
+ Q_OBJECT
+public:
+ /*!
+ * \brief Constructs a new Setting object with the given parent.
+ * \param parent The Setting's parent object.
+ */
+ explicit Setting(QString id, QVariant defVal = QVariant(), QObject *parent = 0);
+
+ /*!
+ * \brief Gets this setting's ID.
+ * This is used to refer to the setting within the application.
+ * \warning Changing the ID while the setting is registered with a SettingsObject results in undefined behavior.
+ * \return The ID of the setting.
+ */
+ virtual QString id() const { return m_id; }
+
+ /*!
+ * \brief Gets this setting's config file key.
+ * This is used to store the setting's value in the config file. It is usually
+ * the same as the setting's ID, but it can be different.
+ * \return The setting's config file key.
+ */
+ virtual QString configKey() const { return id(); }
+
+ /*!
+ * \brief Gets this setting's value as a QVariant.
+ * This is done by calling the SettingsObject's retrieveValue() function.
+ * If this Setting doesn't have a SettingsObject, this returns an invalid QVariant.
+ * \return QVariant containing this setting's value.
+ * \sa value()
+ */
+ virtual QVariant get() const;
+
+ /*!
+ * \brief Gets this setting's actual value (I.E. not as a QVariant).
+ * This function is just shorthand for get().value<T>()
+ * \return The setting's actual value.
+ */
+ template<typename T>
+ inline T value() const { return get().value<T>(); }
+
+
+ /*!
+ * \brief Gets this setting's default value.
+ * \return The default value of this setting.
+ */
+ virtual QVariant defValue() const;
+
+signals:
+ /*!
+ * \brief Signal emitted when this Setting object's value changes.
+ * \param setting A reference to the Setting that changed.
+ * \param value This Setting object's new value.
+ */
+ void settingChanged(const Setting &setting, QVariant value);
+
+public slots:
+ /*!
+ * \brief Changes the setting's value.
+ * This is done by emitting the settingChanged() signal which will then be
+ * handled by the SettingsObject object and cause the setting to change.
+ * \param value The new value.
+ */
+ virtual void set(QVariant value);
+
+protected:
+ QString m_id;
+ QVariant m_defVal;
+};
+
+#endif // SETTING_H