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
![http://racket-lang.org/logo.png"](http://racket-lang.org/logo.png"){kind=link}