This add-on is deprecated as it's nowadays part of the framework core! ButtonGroup allows developer to group together commonly used buttons for minimum layout space. ButtonGroup groups buttons the way that only the outermost buttons have rounded corners. All the middle buttons and in case of only two buttons, the inner corner roundings are removed. This is effective way in many layouts having multiple buttons to group together logically or meaningfully significant buttons. Buttons inside group can easily be disabled and used just as normal buttons. ButtonGroup supports all Vaadin 7 built in themes: Reindeer, Runo and Chameleon. Version 1.2 for Vaadin 6 and Version 2.x for Vaadin 7.