before task parser

testDB/testDBpgSQL/mainwindow.h

@@ -2,6 +2,9 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QTranslator>
+#include <QEvent>
+
 #include "instructorsandtraineeswidget.h"
 
 QT_BEGIN_NAMESPACE
@@ -16,8 +19,19 @@ public:
     MainWindow(QWidget *parent = nullptr);
     ~MainWindow();
 
+protected:
+    void changeEvent(QEvent * event) override;
+
+signals:
+    //сигнал об изменении языка интерфейса
+    void signal_LanguageChanged(QString language);
+
+private slots:
+    void on_comboBox_currentIndexChanged(const QString &arg1);
+
 private:
     Ui::MainWindow *ui;
+    QTranslator qtLanguageTranslator;
 
     InstructorsAndTraineesWidget* m_instructorsAndTraineesWidget;
 };