diff -r 73e448b2943d -r 68443f5be176 src/mainwindow.h
--- a/src/mainwindow.h	Thu Oct 03 23:44:28 2019 +0300
+++ b/src/mainwindow.h	Sat Oct 05 23:47:03 2019 +0300
@@ -1,9 +1,11 @@
 #pragma once
 #include <QMainWindow>
 #include <QTranslator>
+#include <QSettings>
 #include <memory>
 #include <vector>
 #include "documentmanager.h"
+#include "libraries.h"
 
 class MainWindow : public QMainWindow
 {
@@ -14,20 +16,25 @@
 private slots:
 	void newModel();
 	void openModel();
-	void languageChangeRequested();
+	void runSettingsEditor();
 protected:
-	void changeEvent(QEvent* event);
+	void changeEvent(QEvent* event) override;
+	void closeEvent(QCloseEvent* event) override;
 private:
 	std::unique_ptr<class Ui_MainWindow> ui;
 	DocumentManager documents;
 	QMap<Model*, QWidget*> modelWidgets;
+	QString currentLanguage = "en";
+	QTranslator translator;
+	QSettings settings;
+	LibraryManager libraries;
 	QWidget* createWidgetForModel(Model* model);
 	QWidget* getWidgetForModel(Model* model);
-	void loadLocales();
 	void updateTabs();
 	void updateTitle();
-	void changeLanguage(const QString& localeCode);
+	void saveSettings();
+	void restoreSettings();
+	void changeLanguage(QString localeCode);
 	static QString pathToTranslation(const QString& localeCode);
-	QString currentLanguage = "en";
-	QTranslator translator;
+
 };