touchwiz, vaadin 7 and progressindicator

Hi all
I am trying to create a small survey app using touchwiz and vaadin 7; I need to start a timer and show the time left to the user.
The plan was using a progressindicator ( updating the caption ) attached to the left of a navigationview ( setLeftComponent) but it looks like the progressindicator has been deprecated in favor of progressbar.
I have a thread that simply counts the seconds passed and updates the value of the progressbar and have set UI.getCurrent().setPollInterval(1000);

but the bar doesn’t show ( neither it does after manually refreshing ) .

Any clues ?