QApplication::layoutDirection() always returns LeftToRight even if the language is a right to left one

QApplication::layoutDirection() always returns LeftToRight even if the language is a right to left one

e.g. to reproduce:

#include <QtGui>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QTextEdit* t= new QTextEdit();
qDebug() <<" Direction = " << app.layoutDirection(); // should return 1 but always returning 0
t->show();
return app.exec();
}