Hi Vincent, Thanks for looking into this. I changed the code so that make-plot-snip is now typed and the problem goes away. I will now have to find a way to put this fix into my code, as the solution is not particularly elegant and relies on undocumented features (type-environment and parse-syntax).
I inserted my fixed version below, in case you have any suggestions on how to improve it. However, I'm not sure I understand your explanation. I was expecting most of the interactions for drawing the window to be between the frame, the plot-canvas and the plot-snip. The first two objects are created in an untyped environment and the plot-snip, while typed, is inserted into the snip-canvas in an untyped environment as well. Adding a type declaration to make-plot-snip should not have helped much as the interaction between the snip-canvas and the plot-snip is an untyped-typed boundary. So basically, adding type declaration to make-plot-snip fixes the problem, but I have no idea why. Best Regards, Alex, #lang typed/racket/gui (require plot) ; Racket 6.3 ;; make-snip-frame is similar to the one in ;; C:\Program Files\Racket\share\pkgs\plot-gui-lib\plot\private\gui\gui.rkt (module glue typed-racket/base-env/extra-env-lang (provide make-snip-frame) (module types typed/racket/base (require (only-in typed/racket/gui Snip% Frame%)) (provide (all-defined-out)) (define-type Make-Snip-Frame (-> (Instance Snip%) Positive-Real Positive-Real String (Instance Frame%)))) (module untyped-functions racket/gui (require mrlib/snip-canvas) (provide make-snip-frame) (define (make-snip-frame snip width height label) (define frame (new frame% [label label] [width (+ 20 width)] [height (+ 20 height)])) (new snip-canvas% [parent frame] [make-snip (lambda (w h) snip)] [horiz-margin 5] [vert-margin 5] [horizontal-inset 5] [vertical-inset 5]) frame)) (require 'types (for-syntax (submod 'types #%type-decl)) 'untyped-functions) (type-environment [make-snip-frame (parse-type #'Make-Snip-Frame)])) (require 'glue) ;; This works as expected when resizing the window and zooming the graph (define (plot-working) (parameterize ([plot-width 150] [plot-height 150] [plot-x-label #f] [plot-y-label #f]) (send (plot-frame (function sqr -2 2)) show #t))) ;; This does not work in version 6.2 or newer but works fine in version 6.1.1. ;; Try resizing the frame and zooming the plot to see the problem. Compare it ;; with the frame produced by `plot-working` (define (plot-not-working) (parameterize ([plot-width 150] [plot-height 150] [plot-x-label #f] [plot-y-label #f]) ;; this is essentially what plot-frame does sans error checking (send (make-snip-frame (plot-snip (function sqr -2 2)) 150 150 "hello") show #t))) On Tuesday, December 8, 2015 at 3:09:43 AM UTC+8, Vincent St-Amour wrote: > > Alex, > > I've looked into this a little bit more, and it looks like the > `not-working` function (which is, as you say, doing essentially the same > thing as `plot-frame`) is actually kind of working, but is actually > stuttering very badly. > > An important detail here is that `plot` is written in Typed Racket, > whereas your code uses regular, untyped Racket. Interfacing Typed Racket > and Racket code may involve a lot of dynamic checks, which can have > significant overhead, and cause that kind of stuttering. > > *Where* that boundary lies, though, matters a lot. > > If you use `plot-frame`, its (typed) implementation uses the (typed) > version of `make-snip-frame` from inside the `plot` library. The > boundary then lies between your driver code and `plot-frame`. That's not > a very heavily trafficked boundary, so the overhead is minimal. > > If you use your hand-rolled equivalent of `plot-frame`, you're using > your own, untyped version of `make-snip-frame`, so the boundary lies > between the typed `plot-snip` and your untyped `make-snip-frame`. That > seems to be a more trafficked boundary, hence the stuttering. > > (To complicate matters, Neil uses some tricks to add types to > `make-snip-frame` after the fact, without boundary overhead, which is > why the version you copied looked (and kind of was) untyped.) > > Just to confirm, I've converted your file to Typed Racket, and used the > typed version of `make-snip-frame`, and the problem goes away. > > > So the bottom line is, using `pict-snip` from untyped code may be too > slow to be usable. You may want to write the portion of your program > that uses it in Typed Racket. > > Vincent > > > > > On Sun, 06 Dec 2015 05:30:23 -0600, > Alex Harsanyi wrote: > > > > Hi Vincent, > > > > This is still a problem in Racket 6.3. I tried to debug the problem but > > I was unsuccessful. Tried to use a pasteboard% instead, but the > > plot-snip% did not work correctly with that either. Do you have any > > advice on where to start looking? > > > > What I'm trying to do is embed plot-snip% objects inside a GUI. Is there > > a way to do that? I could only find plot-frame which always creates a > > new frame. > > > > For reference, this is that application that is affected: > > https://github.com/alex-hhh/ActivityLog2. The last Racket version that > > works with this is 6.1.1 > > > > Best Regards, > > Alex. > > > > On Tuesday, October 6, 2015 at 4:26:54 AM UTC+8, Vincent St-Amour wrote: > > > > Hi Alex, > > > > Sorry for the late response. > > > > I can confirm the behavior you observed. I don't see anything wrong > > with > > your code at first glance, so I'm not sure what the problem is. > > > > Neil: Any ideas? > > > > Vincent > > > > > > > > On Sun, 04 Oct 2015 20:36:35 -0500, > > Alex Harsanyi wrote: > > > > > > Hi, > > > > > > I posted this question a while ago but I didn't receive any > > response. I > > > just retested the code with the current snapshot (6.2.900.17) and > > it has > > > the same behavior (bug?). > > > > > > Could someone please test this code on their machine and at least > > > confirm whether it works correctly or not for them? > > > > > > If there's a bug in the code below, could you point out what it > > is? As I > > > mentioned, the code works fine in 6.1.1 and I cannot find anything > > that > > > has changed in this area in version 6.2. > > > > > > Note that in recent Racket snapshots snip-canvas% has moved, so, > > in the > > > code below, the "(require unstable/gui/snip)" should be replaced > > with " > > > (require mrlib/snip-canvas)". > > > > > > Thanks, > > > Alex. > > > > > > On Friday, July 24, 2015 at 3:57:13 PM UTC+8, Alex Harsanyi wrote: > > > > > > > > > Hi, > > > > > > I'm using the plot-snip function to have interactive plots inside > > > other GUI elements in my application. This worked fine under > > Racket > > > 6.1.1 but fails under Racket 6.2 (bot versions are 64 bit on > > > Windows). The program below illustrates the problem: the function > > > `working` creates a plot window using plot-frame. The plot is > > > resized correctly and the interactive zoom works as expected. The > > > function `not-working` tries to do the same, but creates the plot > > > using plot-snip than adds it to a snip canvas. It does essentially > > > what plot-frame does, without the error checking (I copied out the > > > functions from he plot package). With this version, the plot is > > not > > > resized correctly inside the window and zoom in and out does not > > > work correctly. Both functions work as expected under Racket > > version > > > 6.1.1. > > > > > > The program makes use of snip-canvas% which is in unstable/gui, > > but > > > as far as I can tell, it has not changed between the two versions. > > > > > > Does anyone know what needs to be done to get this to work, or is > > > this a bug in the plot package? > > > > > > Thanks, > > > Alex. > > > > > > #lang racket/gui > > > (require plot) > > > (require unstable/gui/snip) > > > > > > ;; snip-frame% and make-snip-frame are copied from > > > ;; C:\Program > > > Files\Racket\share\pkgs\plot-gui-lib\plot\private\gui\gui.rkt > > > > > > (define snip-frame% > > > (class frame% > > > (define/override (on-traverse-char event) > > > (define key-code (send event get-key-code)) > > > (case key-code > > > [(escape) (send this show #f)] > > > [else (super on-traverse-char event)])) > > > > > > (super-new))) > > > > > > (define (make-snip-frame snip width height label) > > > (define (make-snip w h) snip) > > > > > > (define frame > > > (new snip-frame% [label label] [width (+ 20 width)] [height (+ 20 > > > height)])) > > > > > > (new snip-canvas% > > > [parent frame] > > > [make-snip make-snip] > > > [horiz-margin 5] [vert-margin 5] > > > [horizontal-inset 5] [vertical-inset 5]) > > > > > > frame) > > > > > > ;; This works as expected when resizing the window and zooming the > > > graph > > > (define (working) > > > (parameterize ([plot-width 150] > > > [plot-height 150] > > > [plot-x-label #f] > > > [plot-y-label #f]) > > > (send (plot-frame (function sqr -2 2)) show #t))) > > > > > > ;; This does not > > > (define (not-working) > > > (parameterize ([plot-width 150] > > > [plot-height 150] > > > [plot-x-label #f] > > > [plot-y-label #f]) > > > ;; this is essentially what plot-frame does sans error checking > > > (send (make-snip-frame (plot-snip (function sqr -2 2)) 200 200 > > > "hello") show #t))) > > > > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Racket Developers" group. > > > To unsubscribe from this group and stop receiving emails from it, > > send > > > an email to racket-dev+...@googlegroups.com. > > > To post to this group, send email to racke...@googlegroups.com. > > > To view this discussion on the web visit > > > > > > https://groups.google.com/d/msgid/racket-dev/c2517296-2a7a-4e49-b617-21cfac413710% > > > 40googlegroups.com. > > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Racket Developers" group. 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