... which was my original question. But thanks.
On Sat, Aug 28, 2010 at 9:36 PM, Robby Findler <ro...@eecs.northwestern.edu> wrote: > I guess you don't have the print handler set up right. > > On Sat, Aug 28, 2010 at 8:23 PM, Shriram Krishnamurthi <s...@cs.brown.edu> > wrote: >> The value I was returning is whatever kind of object is returned when >> you embed an image in the Definitions window. That is, this was a >> pasted, atomic image, not one created by a computation. I guess >> they're not treated the same, but I'm surprised that ASL processing >> the Definitions window didn't do the right conversion... >> >> On Thu, Aug 26, 2010 at 8:25 PM, Robby Findler >> <ro...@eecs.northwestern.edu> wrote: >>> At the moment there is a barn-door sized security hole in DrRacket, >>> whereby it will take any snip% instance from the user's program and >>> just display it in the repl. You can exploit this for Good by making >>> the current-print of your language turn some values into snips (like >>> images and things). 2htdp/image already does this, so that should just >>> work if you return those. Its hard to tell what value Shriram's >>> program was returning tho. But if it is a bitmap% object, he just has >>> to do >>> >>> (make-object image-snip% ...the-bitmap-goes-here...) >>> >>> We will close this hole at some point, when we have a reasonable way >>> to allow people to add new kinds of values without the security >>> breach. >>> >>> Robby >>> >>> On Thu, Aug 26, 2010 at 6:17 PM, Jay McCarthy <jay.mccar...@gmail.com> >>> wrote: >>>> From what I can tell, it comes from ensuring that DrRacket shares the >>>> htdp/image (or whatever) namespace with the running program so the >>>> structs are the same and DrRacket's default renderer is detecting it. >>>> I'm not sure how to replicate it though. (I tried for a bit so I could >>>> make #lang frtime work.) >>>> >>>> Jay >>>> >>>> On Thu, Aug 26, 2010 at 11:55 AM, Shriram Krishnamurthi >>>> <s...@cs.brown.edu> wrote: >>>>> What is the #lang magic that makes >>>>> >>>>>> (get-image-from-web "http://racket-lang.org/logo.png";) >>>>> (instantiate (class ...) ...) >>>>> >>>>> show the image rather than just its constructor? >>>>> >>>>> Shriram >>>>> _________________________________________________ >>>>> For list-related administrative tasks: >>>>> http://lists.racket-lang.org/listinfo/dev >>>>> >>>> >>>> >>>> >>>> -- >>>> Jay McCarthy <j...@cs.byu.edu> >>>> Assistant Professor / Brigham Young University >>>> http://teammccarthy.org/jay >>>> >>>> "The glory of God is Intelligence" - D&C 93 >>>> _________________________________________________ >>>> For list-related administrative tasks: >>>> http://lists.racket-lang.org/listinfo/dev >>> >> > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/dev _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
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