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Diffstat (limited to 'depends/settings/include/settingsobject.h')
| -rw-r--r-- | depends/settings/include/settingsobject.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/depends/settings/include/settingsobject.h b/depends/settings/include/settingsobject.h new file mode 100644 index 00000000..a2f03699 --- /dev/null +++ b/depends/settings/include/settingsobject.h @@ -0,0 +1,192 @@ +/* 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 SETTINGSOBJECT_H +#define SETTINGSOBJECT_H + +#include <QObject> +#include <QMap> + +#include "libsettings_config.h" + +class Setting; + +/*! + * \brief The SettingsObject handles communicating settings between the application and a settings file. + * The class keeps a list of Setting objects. Each Setting object represents one + * of the application's settings. These Setting objects are registered with + * a SettingsObject and can be managed similarly to the way a list works. + * + * \author Andrew Okin + * \date 2/22/2013 + * + * \sa Setting + */ +class LIBSETTINGS_EXPORT SettingsObject : public QObject +{ + Q_OBJECT +public: + explicit SettingsObject(QObject *parent = 0); + + /*! + * \brief Registers the given setting with this SettingsObject and connects the necessary signals. + * This will fail if there is already a setting with the same ID as + * the one that is being registered. + * \note Registering a setting object causes the SettingsObject to take ownership + * of the object. This means that setting's parent will be set to the object + * it was registered with. Because the object it was registered with has taken + * ownership, it becomes responsible for managing that setting object's memory. + * \warning Do \b not delete the setting after registering it. + * \param setting A pointer to the setting that will be registered. + * \return True if successful. False if registry failed. + */ + virtual bool registerSetting(Setting *setting); + + /*! + * \brief Unregisters the given setting from this SettingsObject and disconnects its signals. + * \note This does not delete the setting. Furthermore, when the setting is + * unregistered, the SettingsObject drops ownership of the setting. This means + * that if you unregister a setting, its parent is set to null and you become + * responsible for freeing its memory. + * \param setting The setting to unregister. + */ + virtual void unregisterSetting(Setting *setting); + + + /*! + * \brief Gets the setting with the given ID. + * \param id The ID of the setting to get. + * \return A pointer to the setting with the given ID. + * Returns null if there is no setting with the given ID. + * \sa operator []() + */ + virtual Setting *getSetting(const QString &id) const; + + /*! + * \brief Same as getSetting() + * \param id The ID of the setting to get. + * \return A pointer to the setting with the given ID. + * \sa getSetting() + */ + inline Setting *operator [](const QString &id) { return getSetting(id); } + + + /*! + * \brief Gets the value of the setting with the given ID. + * \param id The ID of the setting to get. + * \return The setting's value as a QVariant. + * If no setting with the given ID exists, returns an invalid QVariant. + */ + virtual QVariant get(const QString &id) const; + + /*! + * \brief Sets the value of the setting with the given ID. + * If no setting with the given ID exists, returns false and logs to qDebug + * \param id The ID of the setting to change. + * \param value The new value of the setting. + * \return True if successful, false if it failed. + */ + virtual bool set(const QString &id, QVariant value); + + /*! + * \brief Reverts the setting with the given ID to default. + * \param id The ID of the setting to reset. + */ + virtual void reset(const QString &id) const; + + /*! + * \brief Gets a QList with pointers to all of the registered settings. + * The order of the entries in the list is undefined. + * \return A QList with pointers to all registered settings. + */ + virtual QList<Setting *> getSettings(); + + /*! + * \brief Checks if this SettingsObject contains a setting with the given ID. + * \param id The ID to check for. + * \return True if the SettingsObject has a setting with the given ID. + */ + virtual bool contains(const QString &id); + +signals: + /*! + * \brief Signal emitted when one of this SettingsObject object's settings changes. + * This is usually just connected directly to each Setting object's + * settingChanged() signals. + * \param setting A reference to the Setting object that changed. + * \param value The Setting object's new value. + */ + void settingChanged(const Setting &setting, QVariant value); + + /*! + * \brief Signal emitted when one of this SettingsObject object's settings resets. + * This is usually just connected directly to each Setting object's + * settingReset() signals. + * \param setting A reference to the Setting object that changed. + */ + void settingReset(const Setting &setting); + +protected slots: + /*! + * \brief Changes a setting. + * This slot is usually connected to each Setting object's + * settingChanged() signal. The signal is emitted, causing this slot + * to update the setting's value in the config file. + * \param setting A reference to the Setting object that changed. + * \param value The setting's new value. + */ + virtual void changeSetting(const Setting &setting, QVariant value) = 0; + + /*! + * \brief Resets a setting. + * This slot is usually connected to each Setting object's + * settingReset() signal. The signal is emitted, causing this slot + * to update the setting's value in the config file. + * \param setting A reference to the Setting object that changed. + */ + virtual void resetSetting(const Setting &setting) = 0; + +protected: + /*! + * \brief Connects the necessary signals to the given Setting. + * \param setting The setting to connect. + */ + virtual void connectSignals(const Setting &setting); + + /*! + * \brief Disconnects signals from the given Setting. + * \param setting The setting to disconnect. + */ + virtual void disconnectSignals(const Setting &setting); + + /*! + * \brief Function used by Setting objects to get their values from the SettingsObject. + * \param setting The + * \return + */ + virtual QVariant retrieveValue(const Setting &setting) = 0; + + friend class Setting; + +private: + QMap<QString, Setting *> m_settings; +}; + +/*! + * \brief A global settings object. + */ +LIBSETTINGS_EXPORT extern SettingsObject *globalSettings; + +#endif // SETTINGSOBJECT_H |