It was convenient to have something that bypassed the whole gui issue. Since it really is a gui issue, I am not too offended that my own laziness got in my way. That said, it seemed to me that the use of the new window was a convenience added for just this kind of use, otherwise I would be using a snip, not just slamming a plot up. When plot-new-window? is #t, the call to plot evaluates to void. So it seems that my use case was the point. Without a reference to the new window, "the opposite problem"---if I understood correctly---can't happen. Can it? <div class="gmail_quote">On Apr 17, 2012 3:12 PM, "Robby Findler" <<a href="mailto:robby@eecs.northwestern.edu">robby@eecs.northwestern.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> FWIW, I think we'd want somehow, in the library, to show plot windows in a way that doesn't do any special threading/eventspace stuff, or else the opposite confusion can happen. How about, for this situation, having a function called 'show-plot!' that takes a plot and puts it into a window in a separate eventspace, collecting all of the plots? Robby On Tue, Apr 17, 2012 at 1:16 PM, Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>> wrote: > You could give each frame in its own eventspace. > > At Tue, 17 Apr 2012 11:45:20 -0600, Neil Toronto wrote: >> Would it be possible to change plot so that its windows always behave >> like this? Could I make it not require cooperation from the program that >> calls `plot-frame'? >> >> This is going to come up every time someone wants to pop up plot windows >> in a non-GUI, interactive loop. >> >> Neil ⊥ >> >> On 04/17/2012 10:48 AM, Matthew Flatt wrote: >> > All GUI activity like window drawing happens only in the main thread of >> > an eventspace. Your program also starts out in the main thread. So, >> > yes, drawing has to wait until your loop completes. >> > >> > One solution is to put your loop in a separate thread. The example >> > below creates a thread and passes it to `yield' to wait until the >> > thread is done. The `yield' function is special in that it lets other >> > GUI activity happen while it waits: >> > >> > #lang at-exp racket >> > (require plot >> > racket/gui/base) >> > (plot-new-window? #t) >> > (yield >> > (thread >> > (lambda () >> > (let loop () >> > (let ((dummy (read))) >> > (if (and (number? dummy) (zero? dummy)) >> > (void) >> > (begin >> > (plot (function (λ(x) (* x x)) -2 2)) >> > (loop)))))))) >> > >> > Although the above should work, it's not really a good idea to perform >> > GUI actions outside of the main thread. So, here's an improved version >> > that uses `queue-callback' to send the `plot' call back to the main >> > thread: >> > >> > #lang at-exp racket >> > (require plot >> > racket/gui/base) >> > (plot-new-window? #t) >> > (yield >> > (thread >> > (lambda () >> > (let loop () >> > (let ((dummy (read))) >> > (if (and (number? dummy) (zero? dummy)) >> > (void) >> > (begin >> > ;; queue a callback instead of `plot' directly: >> > (queue-callback >> > (lambda () >> > (plot (function (λ(x) (* x x)) -2 2)))) >> > (loop)))))))) >> > >> > For more information, see >> > >> > >> <a href="http://docs.racket-lang.org/gui/windowing-overview.html#(part._eventspaceinfo)" target="_blank">http://docs.racket-lang.org/gui/windowing-overview.html#(part._eventspaceinfo)</a> >> > >> > >> > At Tue, 17 Apr 2012 10:40:55 -0400, Deren Dohoda wrote: >> >> I was messing around with a spline utility last night and was using >> >> the plot-new-window? setting to get a plot. The goal was to share an >> >> exe with a coworker who doesn't have Racket. Just a command-line app >> >> but to get the plot to display I needed a window and this seemed >> >> awesome. The problem is I couldn't get the plot to display when the >> >> thread was in a procedure. The window would appear but it was like the >> >> plot backend wasn't free to draw to it. Here's a way to reproduce it >> >> on v5.2: >> >> >> >> #lang at-exp racket >> >> (require plot) >> >> (plot-new-window? #t) >> >> (let loop () >> >> (let ((dummy (read))) >> >> (if (and (number? dummy) (zero? dummy)) >> >> (void) >> >> (begin >> >> (plot (function (λ(x) (* x x)) -2 2)) >> >> (loop))))) >> >> >> >> So long as you are looping, new windows will appear without plot >> >> contents. When you finally quit (here by entering the number zero) all >> >> the plots are drawn in those windows. Any help? Did I do something >> >> horribly dumb? >> >> >> >> Thanks, >> >> Deren >> >> >> >> ____________________ >> >> Racket Users list: >> >> <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> >> > >> > ____________________ >> > Racket Users list: >> > <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> >> >> ____________________ >> Racket Users list: >> <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> > > ____________________ > Racket Users list: > <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> ____________________ Racket Users list: <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> </blockquote></div>