Value | Symbolic name | Description | 
|   0 | GTK_BUTTONBOX_DEFAULT_STYLE | 
   The current default style for button arrangement, which can be reset.  The
   default setting is GTK_BUTTONBOX_EDGE.
   | 
|   1 | GTK_BUTTONBOX_SPREAD | 
   Specifies that the buttons should be spaced evenly across the area of the
   buttonbox, with a full-sized space at either edge of the column or row.
   | 
|   2 | GTK_BUTTONBOX_EDGE | 
   Specifies that the buttons should be spaced evenly across the area of the
   buttonbox, with no space at either edge of the column or row.
   | 
|   3 | GTK_BUTTONBOX_START | 
   Specifies that the buttons should be packed from the top or left edge of
   the buttonbox, and spaced according to their spacing and internal
   padding settings.
   | 
|   4 | GTK_BUTTONBOX_END | 
   Specifies that the buttons should be packed from the bottom or right edge
   of the buttonbox, and spaced according to their spacing and internal
   padding settings.
   |