ToggleButton

The ToggleButton is a standard Motif widget. This object consists of a small 
square with a label string off to one side. If you click the first mouse button
anywhere inside the ToggleButton (in the square or on the label), the square 
either pushes in or pops out, opposite to its current state. When the square is 
pushed in, the ToggleButton is active. 

Note that when multiple ToggleButtons share a common parent, each button can
be set or unset independently of one another. This is in direct contrast to a
set of RadioButtons, in which only one button can be active at any given time.

See also: DebugDialog
