3.5 Miscellaneous button elements

3.5.2 Check buttons

1. Type the following in a Listener:

(setq check (make-instance 'check-button  
                       :selection-callback 'hello
                       :retract-callback 'test-callback
                       :text "Button"))

(contain check)

Figure 3.5 A check button

Notice the use of:retract-callback in the example above, to specify a callback when the element is deselected.

Like push buttons, check buttons can be disabled by specifying:enabled nil.

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