Components: toolbar and toolbarbutton.

A toolbar is used to place a series of buttons, such as toolbar buttons. The toolbar buttons could be used without toolbars, so a toolbar could be used without tool buttons. However, tool buttons change their appearance if they are placed inside a toolbar.

The toolbar has two orientation: horizontal and vertical. It controls how the buttons are placed.

<toolbar>
    <toolbarbutton label="button1"/>    
    <toolbarbutton label="button2"/>    
</toolbar>