The Racket binding for Gtk (or Cocoa or Windows) in `racket/gui`
currently does not report multi-touch events. I agree that multi-touch
events could be supported without too much difficulty, probably, and a
pull request would be welcome --- but there's nothing in place right
now.
At Sat, 24 Sep 2016 10:09:28 -0700 (PDT), Johan Liseborn wrote:
> Hi all,
>
> Is it possible to detect and handle multi-touch events somehow in the Racket
> GUI system? I have tried to look through the documentation, but can only find
> mouse- and key events.
>
> As far as I understand, the Racket GUI stuff is based on GTK+, which I
> believe
> is able to handle multi-touch, so in principle, I assume it should be
> possible
> to have touch events exposed on the Racket level...
>
> I am currently working on a product where we are using Qt/C++, but the pain
> of
> C++ in this particular case is becoming unbearable to me, so I am looking for
> alternatives, and the available Qt language bindings seem pretty limited, so
> I
> started looking at GTK+. I am playing with SBCL and cl-cffi-gtk, which looks
> promising. But being a fan of Racket, I also wanted to explore that
> possibility!
>
> I asked this question on #racket some time ago, and got a pointer to Jays
> work
> with Racket on Android. I haven't been able to check that out yet, but I
> would
> really like something that is "mainstream Racket".
>
>
> Cheers,
>
> /johan
>
> --
> Johan Liseborn
>
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