A container for arranging buttons vertically
A button box should be used to provide a consistent layout of buttons throughout your application. The layout/spacing can be altered by the programmer, or if desired, by the user to alter the 'feel' of a program to a small degree.
A <gtk-vbutton-box> is created with gtk-vbutton-box-new. Buttons
are packed into a button box the same way widgets are added to any other
container, using gtk-container-add. You can also use
gtk-box-pack-start or gtk-box-pack-end, but for button boxes both
these functions work just like gtk-container-add, ie., they pack the
button in a way that depends on the current layout style and on whether the
button has had gtk-button-box-set-child-secondary called on it.
The spacing between buttons can be set with gtk-box-set-spacing. The
arrangement and layout of the buttons can be changed with
gtk-button-box-set-layout.