15.6 Defining the callbacks
(defun children-function (x) (when (< x 8) (list (* x 2) (1+ (* x 2)))))Note: The ROOTS attribute of a graph pane has a default value of
'(1). This is generated automatically by the interface builder.
Finally, the function
test-ib-example is used to create an instance of the example interface.
(defun test-ib-example () (capi:display (make-instance 'ib-example)))
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