On Nov 17, 2011, at 11:03 AM, Robby Findler wrote: > This seems like the kind of thing where the stepper takes control over > the GUI in the same way that the OS can take over the GUI of a > program. Instead of a spinning beach ball, tho, it would be good if > the stepper dim the windows and write some message on top of them, > telling the user to go to the stepper window to advance the program. > > I don't think that we have the right hooks for that yet, but you could > probably do some clever namespace hacking to replace frame% with > something that collaborated with the stepper and then use that > namespace to start the user's program.
Oog... this all sounds really complicated. I have something really simple in mind. The user's thread increments a counter every time it sends a step to the stepper. When it gets to 10K, it sends a "here's a semaphore, I'm going to block on it" message. The stepper then throws up a modal dialog (yes, I'm guessing this blocks all of the DrRacket interface) with three(?) choices: Halt the program, keep running for another 10K steps, or keep running forever. Shall we take this off racket-users? John > > Robby > > On Thu, Nov 17, 2011 at 12:56 PM, John Clements > <cleme...@brinckerhoff.org> wrote: >> >> On Nov 17, 2011, at 10:53 AM, Matthias Felleisen wrote: >> >>> >>> On Nov 17, 2011, at 1:47 PM, John Clements wrote: >>> >>>> Suppose you run a big-bang program that puts a dot on the screen every >>>> time you press a key. Now suppose it runs for 1K steps and halts. The >>>> user sees that the window is frozen, but probably won't figure out that >>>> the way to un-freeze it is to go to the stepper window and advance past >>>> the end of the currently-computed steps. >>> >>> Perhaps 'universe' should have a 'stepper' entry point so that it can >>> signal to programmers that it is waiting for stepper input. -- Matthias >> >> This sounds complicated (for you and me to implement). What would the user >> see? >> >> John >> >> >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/users >>
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