I am using QT to develop a rich UI application.
Simple example would be, I have to show a boiler with the water level inside the feed tank.
Now in this case the progress bar would be in the foreground and the label in the background.
Regards,
Use QWidget::move() to set the position, QWidget::resize() to set the size and reimplement the parent's resizeEvent() handler if you need to re-position the widgets if their parent resizes.