You could be right. But the class in the source code has inheritance from QWidget.
The QLabels didn't show with that properly as it was only first letter was seen from any label.
The trick with QPainter did it's job - there is a loop for all required text and painter draws it:
painter.drawText(x, y, text);
Draw text with different color and different size is not a big deal. With color seems to be fine - just call painter.setPen(color). And after - painter.setFont(font)
But now I am facing new problems - how can I make the window with all that information to be transparent?
Best regards
Pavel