QTextDocument* doc = new QTextDocument(0);
QFont font = doc->defaultFont();
font.setBold(false);
font.setFamily("Arial");
font.setPointSize(20);
doc->setDefaultFont(font);
//doc->setDefaultStyleSheet("body{font-family: Arial;font-weight:normal;}");
doc->setHtml("xD lub heeeheee");
QTextEdit* edit = new QTextEdit(0);
edit->setGeometry(QRect(QPoint(200, 200), QSize(200, 200)));
edit->setDocumentTitle("Peniski");
edit->setDocument(doc);
edit->show();