The toggle-button gadget provides "on/off" switch behavior. This gadget typically appears as a recessed or prominent box. If the box is recessed, the gadget's value is t ; if it is prominent, the value is nil .
arm-callback will be invoked when the toggle button becomes armed (such as when the pointer moves into it, or a pointer button is pressed over it). When the toggle button is actually activated (by releasing the pointer button over it), value-changed-callback will be invoked. Finally, disarm-callback will be invoked after value-changed-callback , or when the pointer is moved outside of the toggle button.
Summary: The class that implements an abstract toggle button. It is a subclass of value-gadget and labelled-gadget-mixin .
Summary: This initializes the indicator type property for the gadget.
toggle-button-indicator-type [Generic Function]
Summary: Returns the indicator type for the toggle button. This will be either :one-of or :some-of . The indicator type controls the appearance of the toggle button. For example, many toolkits present a one-of-many choice differently from a some-of-many choice.
gadget-value [Generic Function]
Arguments: (value-gadget toggle-button )
Summary: Returns t if the button is selected; otherwise, it returns nil .
Summary: The class that implements a portable toggle button; a subclass of toggle-button .
Common Lisp Interface Manager 2.0 User's Guide - 7 Aug 2017