допилил ownerWidget в DataBaseLMS

DataBaseLMS/databaselms.cpp

@@ -9,9 +9,9 @@
 const QString DataBaseLMS::TypeUserDBInstructor = "instructor";
 const QString DataBaseLMS::TypeUserDBTrainee = "trainee";
 
-DataBaseLMS::DataBaseLMS(QWidget *ownerWidget):
+DataBaseLMS::DataBaseLMS(QWidget *ownerWidget, QObject *parent):
+    QObject(parent),
     db(nullptr),
-    transactionBegined(false),
     ownerWidget(ownerWidget)
 {
 
@@ -22,6 +22,12 @@ DataBaseLMS::~DataBaseLMS()
     deleteConnection();
 }
 
+void DataBaseLMS::slot_LanguageChanged(QString language)
+{
+    qtLanguageTranslator.load(QString(QStringLiteral("translations/DataBaseLMS_")) + language, QStringLiteral("."));
+    QCoreApplication::installTranslator(&qtLanguageTranslator);
+}
+
 bool DataBaseLMS::createConnection()
 {
     dbSettings = getDataBaseSettings();
@@ -52,9 +58,6 @@ bool DataBaseLMS::createConnection()
 
 void DataBaseLMS::deleteConnection()
 {
-    if(transactionBegined)
-        QSqlDatabase::database().rollback();
-
     if(db != nullptr)
     {
         if(db->isOpen())
@@ -87,7 +90,7 @@ DataBaseSettings DataBaseLMS::getDataBaseSettings()
     QFile file("config/settings.xml");
     if(!file.open(QIODevice::ReadOnly))
     {
-        QMessageBox::critical(ownerWidget, "Attention!", "The file could not be opened: config/settings.xml");
+        QMessageBox::critical(ownerWidget, tr("Attention!"), tr("The file could not be opened:") + "config/settings.xml");
         return settings;
     }
     QXmlStreamReader xmlReader(&file);