Class
check-button-panel is a pane containing a group of buttons each of which can be selected or deselected. check-button-panel inherits all of its behavior frombutton-panel, which itself inherits most of its behavior fromchoice. Thus, thecheck-button-panel can accept items, callbacks, and so on.
(capi:contain (make-instance
'capi:check-button-panel
:title "Select some packages"
:items '("CAPI" "LISPWORKS" "CL-USER")))
(setq buttons (capi:contain
(make-instance
'capi:check-button-panel
:title "Select some packages"
:items '("CAPI" "LISPWORKS" "CL-USER")
:layout-class 'capi:column-layout)))
(capi:choice-selected-items buttons)