Prints an item as a string.
capi
print-collection-item item collection
item⇩ |
An item or an Lisp object. |
collection⇩ |
A collection or any Lisp object. |
The generic function print-collection-item
prints item as a string. It is used when item is known to be an item in collection.
An item in a collection prints using the first of these which returns non-nil: the item's text, the item's print-function, the collection's print-function or the item's data. An item not known to be in the collection is printed simply using print-object.
The method on (t collection)
uses the collection's print-function.
(setq collection (make-instance 'capi:collection :items '(1 2 3 4 5) :print-function #'(lambda (x) (format nil "<~A:>" x))))
(capi:print-collection-item 2 collection)
In this example we provide our own print-collection-item
method:
(defclass my-tree-view (capi:tree-view) ()) (defmethod capi:print-collection-item ((item capi:item) (tree my-tree-view)) (string-capitalize (svref (capi:item-data item) 0))) (capi:contain (make-instance 'my-tree-view :roots (list (make-instance 'capi:item :data (vector "foo")))))
CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:32:42