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5.11 The toggle Widget

Syntax:

     type ::= (toggle [keyword argument]...)

The widget has two possible states, ‘on’ and ‘off’, which correspond to a t or nil value, respectively.

The following extra properties are recognized:

:on
A string representing the ‘on’ state. By default the string ‘on’.
:off
A string representing the ‘off’ state. By default the string ‘off’.
:on-glyph
Name of a glyph to be used instead of the ‘:on’ text string, on emacsen that supports this.
:off-glyph
Name of a glyph to be used instead of the ‘:off’ text string, on emacsen that supports this.