Updating the docs is good regardless, I agree. Robby
On Wed, Apr 6, 2011 at 11:42 AM, Jay McCarthy <jay.mccar...@gmail.com> wrote: > It would've help me find the problem, but I already knew to look at > the doc page for what to override, so if that is updated, I don't > think I could be blamed. > > Jay > > 2011/4/5 Robby Findler <ro...@eecs.northwestern.edu>: >> Does it make sense to have snip%'s copy method signal an error instead >> of returning a (useless) snip%? or maybe it could check and see if >> this is a subclass and signal an error in that case? >> >> Robby >> >> On Tuesday, April 5, 2011, Matthias Felleisen <matth...@ccs.neu.edu> wrote: >>> >>> Please! >>> >>> On Apr 5, 2011, at 3:06 PM, Jay McCarthy wrote: >>> >>>> Should I update the docs to mention that as one that must be overridden? >>>> >>>> Jay >>>> >>>> 2011/4/5 Robby Findler <ro...@eecs.northwestern.edu>: >>>>> copy. >>>>> >>>>> Robby >>>>> >>>>> On Tue, Apr 5, 2011 at 1:34 PM, Jay McCarthy <jay.mccar...@gmail.com> >>>>> wrote: >>>>>> I'm trying to create a useful snip that displays a different sub-snip >>>>>> every second. I think I've overridden every method required to get a >>>>>> "useful" snip, but nothing gets display in DrRacket and the functions >>>>>> aren't called ever. Are there other methods that need to be >>>>>> overridden? >>>>>> >>>>>> The code is below... >>>>>> >>>>>> Jay >>>>>> >>>>>> #lang racket/base >>>>>> (require (for-syntax racket/base) >>>>>> racket/class >>>>>> racket/function >>>>>> racket/runtime-path >>>>>> racket/snip) >>>>>> >>>>>> (define reactive-snip% >>>>>> (class* snip% () >>>>>> (init-field sub-snips) >>>>>> >>>>>> (printf "Snips: ~a\n" sub-snips) >>>>>> >>>>>> (define (the-snip) >>>>>> (list-ref sub-snips >>>>>> (modulo (current-seconds) (length sub-snips)))) >>>>>> >>>>>> (define-syntax-rule (delegate id) >>>>>> (define/override (id . a) >>>>>> (define some-snip (the-snip)) >>>>>> (printf "Delegating (~a ~a) to ~a\n" >>>>>> 'id a >>>>>> some-snip) >>>>>> (send/apply some-snip id a))) >>>>>> >>>>>> (delegate get-extent) >>>>>> (delegate draw) >>>>>> (delegate get-text) >>>>>> ; set-unmodified or modified >>>>>> >>>>>> (super-new))) >>>>>> >>>>>> (define-runtime-path img1 '(lib "PLT-206-larval.png" "icons")) >>>>>> (define-runtime-path img2 '(lib "PLT-206-mars.jpg" "icons")) >>>>>> >>>>>> (define sub-snips >>>>>> (map (curry make-object image-snip%) >>>>>> (list img1 img2))) >>>>>> >>>>>> (define x >>>>>> (make-object >>>>>> reactive-snip% >>>>>> sub-snips)) >>>>>> >>>>>> sub-snips >>>>>> >>>>>> x >>>>>> >>>>>> -- >>>>>> Jay McCarthy <j...@cs.byu.edu> >>>>>> Assistant Professor / Brigham Young University >>>>>> http://faculty.cs.byu.edu/~jay >>>>>> >>>>>> "The glory of God is Intelligence" - D&C 93 >>>>>> _________________________________________________ >>>>>> For list-related administrative tasks: >>>>>> http://lists.racket-lang.org/listinfo/users >>>>>> >>>>> >>>> >>>> >>>> >>>> -- >>>> Jay McCarthy <j...@cs.byu.edu> >>>> Assistant Professor / Brigham Young University >>>> http://faculty.cs.byu.edu/~jay >>>> >>>> "The glory of God is Intelligence" - D&C 93 >>>> >>>> _________________________________________________ >>>> For list-related administrative tasks: >>>> http://lists.racket-lang.org/listinfo/users >>> >>> >> > > > > -- > Jay McCarthy <j...@cs.byu.edu> > Assistant Professor / Brigham Young University > http://faculty.cs.byu.edu/~jay > > "The glory of God is Intelligence" - D&C 93 > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
