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LispWorks IDE User Guide>
20 Example: Using The Interface Builder>
20.6 Defining the callbacks 20.6.3 Callbacks for menu itemsBoth menu items in the interface need a callback function. As with other callback functions, these are specified by defining a general callback, display-pane-selection , which displays, in a dialog, the current selection of any pane.
(defun display-pane-selection (reader data interface)
(declare (ignore data))
(capi:display-message "~S: ~S selected"
(capi:capi-object-name
(funcall reader interface))
(capi:choice-selected-items
(funcall reader interface))))
The following two functions call display-pane-selection , passing the reader of a pane as an argument. These functions are specified as the callbacks for the two menu items.
(defun display-graph-selection (&rest args)
(apply 'display-pane-selection 'graph-reader args))
(defun display-list-selection (&rest args)
(apply 'display-pane-selection 'list-reader args))
As with the other callback functions, specifying the callbacks in this way allows for easy extension of the example.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011
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