17 Mar
2008
17 Mar
'08
11:59 p.m.
Two questions...
1) What's the best way to remove an observer that's been set on some slot?
2) If there's an observer like
(defobserver image-files ((self widget)) (loop for (name file-pathname) in (set-difference new-value old-value :key 'car) do (tk-format `(:pre-make-tk ,self) "image create photo ~(~a.~a~) -file {~a} -height ~a -width ~a" (^path) name (namestring file-pathname) (^height)(^width))))
....can I make one that specializes on a subclass of widget that overrides the first? How does one do this?
-- Andy