[plt-scheme] Interactive gui development in Emacs with MrEd

This is actually subtly wrong (because REPL interactions and GUI
callbacks will now be in separate threads, and that can lead to
strange behavior). There was a recent discussion of this here on the
mailing list, and the short version of the story is that the
implementation of -z in v4 is going to "do the right thing", ie what
you want.

Robby

On Sat, May 3, 2008 at 9:43 PM, Ben Simon <benjisimon at gmail.com> wrote:
> After kicking off mred -z, did you run the following in your emacs repl:
>   (current-eventspace (make-eventspace))
>
> Does that help?
>
> Here's where I first saw that advice:
>   http://www.neilvandyke.org/quack/quack.el
> ;; Evaluate
> ;;
> ;;   (current-eventspace (make-eventspace))
> ;;
> ;; as the first expression in the stdio REPL, and then it will work the
> ;; way you want.
> ;;
> ;; The GUI REPL creates a new eventspace for evaluating expressions, so
>  ;; the expressions are not evaluated in MrEd's main thread. The stdio
> ;; REPL, however, uses the main thread for evaluating expressions, so that
> ;; it acts just like MzScheme.
>
>
>
>
> On Sat, May 3, 2008 at 2:07 PM, Andrei Stebakov <lispercat at gmail.com> wrote:
>
> >
> >
> >
> > I am making my first steps with MrEd with gui apps (on MS WinXP)
> > I took a sample of "hello" application from
> http://programmingalchemy.blogspot.com/2007/05/open-source-cross-platform-gui.html
> >
> > and pasted that code in hello.scm in Emacs. I started MrEd -z and started
> to evaluate all forms one after another (with Ctr-x Ctrl-e).
> > Finally when I came to the final form (send frame show #t) and evaluated
> it, a window without any contents appeared, to get message to show on the
> window I had to switch back and forth from the app to emacs.
> > Looks like emacs is blocking the message thread of the MrEd application.
> > I am not sure if it's the right way to use MrEd in Emacs... I come from
> Common Lisp/Slime environment, so it seemed natural to me.
> > When I compile the file and make an exe, everything works.
> > How the interactive development with MrEd should look like when you add
> new UI elements and test them before you make the final exe?
> >
> > Thank you,
> > Andrew
> >
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>
>
> --
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