Popup the details from a selected table row

Hi,

I need to add a popup displaying, the contents/fields in detail on selecting a table row.
After going through the vaadin tutorials i got up a doubt regard which UI (popup/sub window/notification) can be used for this purpose.

(My scenario in detail - At present am displaying a table with two fields visible. When I select a particular row, I need a popup for displaying the contents in detail. Tried popup but it using only a string for selecting and not a table row)

Pls provide a valuable suggestion. Thanks in advance.