A tab widget is a widget that organizes contents in tab panes.
A WTabWidget combines a horizontal WMenu with a WStackedWidget in a tab-like look. A tab widget will place the tab bar on top of the contents, and fit the contents below it. It is similar to a WNavigationBar but with less options like a title or multiple menus.
The tab widget is styled by the current CSS theme. The look (of the header) can be overridden using the Wt-tabs CSS class and addition to selectors like ul, li and span.