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 [email protected]. > > To post to this group, send email to [email protected]. > > 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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