mirror of https://github.com/saitohirga/WSJT-X.git
110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
#ifndef MULTISETTINGS_HPP__
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#define MULTISETTINGS_HPP__
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#include <QObject>
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#include <QVariant>
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#include <QString>
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#include "pimpl_h.hpp"
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class QSettings;
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class QMainWindow;
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class QMenu;
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//
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// MultiSettings - Manage multiple configuration names
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//
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// Responsibilities:
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//
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// MultiSettings allows a Qt application to be run with alternative
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// settings as stored in a QSettings INI style file. As far as the
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// application is concerned it uses the QSettings instance returned
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// by the MultiSettings::settings() method as if it were the one and
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// only QSettings object. The alternative settings are stored as
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// QSettings groups which are children of a root level group called
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// MultiSettings. The current settings are themselves stored at the
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// root so the QSettings group name MultiSettings is reserved. Also
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// at the root level a key called CurrentMultiSettingsConfiguration
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// is reserved to store the current configuration name.
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//
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//
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// Example Usage:
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//
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// #include <QApplication>
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// #include "MultiSettings.hpp"
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// #include "MyMainWindow.hpp"
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//
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// int main (int argc, char * argv[]) {
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// QApplication a {argc, argv};
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// MultiSettings multi_settings;
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// int result;
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// do {
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// MyMainWindow main_window {&multi_settings};
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// main_window.show ();
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// result = a.exec ();
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// } while (!result && !multi_settings.exit ());
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// return result;
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// }
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//
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// In the main window call MultiSettings::create_menu_actions() to
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// populate an existing QMenu widget with the configuration switching
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// and maintenance actions. This would normally be done in the main
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// window class constructor:
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//
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// MyMainWindow::MyMainWindow (MultiSettings * multi_settings) {
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// QSettings * settings {multi_settings->settings ()};
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// // ...
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// multi_settings->create_menu_actions (this, ui->configurations_menu);
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// // ...
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// }
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//
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class MultiSettings
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: public QObject
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{
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Q_OBJECT
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public:
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// config_name will be selected if it is an existing configuration
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// name otherwise the last used configuration will be selected or
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// the default configuration if none exist
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explicit MultiSettings (QString const& config_name = QString {});
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MultiSettings (MultiSettings const&) = delete;
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MultiSettings& operator = (MultiSettings const&) = delete;
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~MultiSettings ();
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// Add multiple configurations navigation and maintenance actions to
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// a provided menu. The provided main window object instance will
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// have its close() function called when a "Switch To" configuration
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// action is triggered.
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void create_menu_actions (QMainWindow *, QMenu *);
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// switch to this configuration if it exists
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Q_SLOT void select_configuration (QString const& name);
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QString configuration_name () const;
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// Access to the QSettings object instance.
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QSettings * settings ();
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// Access to values in a common section
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QVariant common_value (QString const& key, QVariant const& default_value = QVariant {}) const;
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void set_common_value (QString const& key, QVariant const& value);
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void remove_common_value (QString const& key);
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// Call this to determine if the application is terminating, if it
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// returns false then the application main window should be
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// recreated, shown and the application exec() function called
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// again.
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bool exit ();
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// emitted when the name of the current configuration changes
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Q_SIGNAL void configurationNameChanged (QString name) const;
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private:
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class impl;
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pimpl<impl> m_;
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};
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#endif
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