gmane.lisp.scheme.gambit

Re: gambit-objc v0.1.0 released

Jason Felice — 2013-05-20T01:42:24

It doesn't need Cocoa at all.  Right now it just depends on -lffi -lobjc
and Foundation.framework.  Foundation could be removed (I think it's just
for -retain and -release).  I know GNUstep's -lobjc is different from
Apple's, but it should have equivalent functionality that would be easy to
port to if it doesn't have the same functions.

Makefile twiddling would probably be required in unusual environments.

I'd be happy to help. :)

-Jason



On Sun, May 19, 2013 at 3:51 PM, Jeff Read <bitwize< at >gmail.com> wrote:

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Re: gambit-objc v0.1.0 released

Jeff Read — 2013-05-19T20:51:55

Quick question: Will this bridge work in the absence of a Cocoa runtime? I
use Objective-C in places that don't have a Cocoa/Openstep/GNUstep stack,
and something like this would be hella useful, even there.
On May 19, 2013 1:22 PM, "Jason Felice" <jason.m.felice< at >gmail.com> wrote:

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Re: gambit-objc v0.1.0 released

Jason Felice — 2013-05-19T17:21:42

Someone reminded me that I didn't include the link.  Duh.

It's here:

https://github.com/maitria/gambit-objc


On Sat, May 18, 2013 at 12:12 PM, Jason Felice <jason.m.felice< at >gmail.com>wrote:

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gambit-objc v0.1.0 released

Jason Felice — 2013-05-18T17:12:40

Hi!

I've just released gambit-objc 0.1.0.  This is the "it has the basics, and
the implementation is complete enough for real projects" release.

* It gives you access to Objective-C class objects.  The easiest way is:

  (import-classes (NSString NSDictionary))

  after which, you can refer to them.

* It dynamically dispatches Objective-C methods:

  (: NSString stringWithUTF8String: "hello, world")

* It supports marshaling of native Scheme objects to C/Objective-C types
for parameter and return values, including structures, selectors, all
integral types, and UTF8 strings.  It wraps Objective-C objects with
foreign.

* It has a objc-repl, an extended version of gsi which supports
square-brace syntax, like so:

  [NSString stringWithUTF8String: "Hello, world!"]

You'll find a minimal sample Cocoa app in the distribution as well.

There are many cool things that can be added.  I'd love to collaborate,
help people use it, and otherwise enable its adoption.

I'm really happy with how elegant it ended up (aft

Re: Gambit GUI

Ralph Moritz — 2013-05-14T04:46:32

Yes, please make your updated version of pstk available on GitHub or  
BitBucket!

On Tue, 14 May 2013 02:35:02 +0200, Adrien Piérard  
<pierarda< at >iro.umontreal.ca> wrote:

Re: Gambit GUI

Adrien Piérard — 2013-05-14T00:35:02

Fred,

I just discovered pstk last week.
If you've got a working, updated version, I would suggest you fork the
initial repo on bitbucket/github, and link your code to gambit's
dumping grounds.

P!


On 13 May 2013 13:19, Fred Weigel <fred.weigel< at >zylog.ca> wrote:

Re: Gambit GUI

Fred Weigel — 2013-05-13T20:19:39


Hendrick - On Linux I use pstk (dickey, holm, busch, 2004-2008). It has
suffered only the mildest bitrot (extra widgets in Ttk 8.5, correct version
checking). I can email you the version I am currently using, if you want.
(send me an email to fred (dot) weigel (at) zylog (dot) ca )

That gives you easy menus, text, and even graphics. The code is pretty much
portable to any system that supports tcl/tk (that includes Windows and Mac).

Re: Gambit GUI

Mikael — 2013-05-11T10:17:55

Not that I'm aware of.

Probably the very most relevant thing would be getting a OpenGL (as in,
hardware accelerated scrolling etc.), crossplatform toolkit running, that
would deliver for modern day apps.

2013/5/11 Hendrik Boom <hendrik< at >topoi.pooq.com>

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Garbage collection collusion?

Hendrik Boom — 2013-05-11T02:17:01

I've often thought that languages with garbage collectors should have 
some means for the garbage collectors to communicate with one another.

Gambit GUI

Hendrik Boom — 2013-05-10T23:58:48

Are any GUI toolkits a good fit with Gambit?

At the moment I only need a text interface, but the text would be change 
all over the screen (or window).  In the 80's I'd use cursor controls on 
a  VT100, but I suspect I can do better nowadays.

In the long run I'll probably want some menus and images.

Currently using Gambit on Linux. Portability to other platforms is not 
necessary, but would be nice.

Re: Apps with GUI running on android

Fred Weigel — 2013-05-10T21:15:31

A couple of warnings, now that I am playing around with Flowers Android Gambit-C

1 - The (splash) procedure must be called before editing of scripts on the
device can be done.
2 - The first script is always executed. Normally, this calls (splash).
3 - If you add a script, make THAT call splash, and any other startup code
before that.
4 - Edit the original "splash" script.

So, the script editing is a bit weird. The editing box is 9 lines by half
the screen on my phone. Maybe the html can be replaced to fix this.

5 - If you mess up the scripts, you should still get DIRECTLY into the REPL.
Scripts will be reset to default.

6 - You WILL need to keep separate copies of all your local scripts.

Re: Apps with GUI running on android

Adrien Piérard — 2013-05-09T20:18:22

Alright, thanks.
I'll investigate that when I have a bit more time.

Cheers,

P!


On 8 May 2013 13:26, Fred Weigel <fred.weigel< at >zylog.ca> wrote:

Re: Apps with GUI running on android

Fred Weigel — 2013-05-08T20:26:50

In Keith Flowers Gambit-C for Android, there is a "program.scm" file that
contains:

(define (set-page content handler)
(set! event-handler handler)
(set-webView-content content)
(show-webView))

and that's pretty much what you would do. The same file shows building and
html string for the content, and adding a function for the handler.

http://apps.keithflower.org/?page_id=152

to download the source archive.

I believe Android supports html5, so I would play with the <canvas> tag and
a bit of javascript (you can just dump the graphic you want into the webView
content to try). Interaction will be limited so a drawing program may not
be.. um.. a good thing to do, but basic stuff like editing the scripts, and
pushing buttons is done is program.scm, and can be "borrowed".

Anyway, you don't "post", you generate "events" using javascript embedded in
the content.

If your application started an "integrated" web server, you could "post" to
that web server. But, I think the content/handler approach brings everythi

Lisp in Summer Projects - welcome

Marc Feeley — 2013-05-09T04:16:46

If you are doing a project in Gambit Scheme (or any other Lisp), then you might be interested in this contest, with many cash prizes:

http://lispinsummerprojects.org/welcome 

Marc

Re: Apps with GUI running on android

Frederick LeMaster — 2013-05-08T05:00:55

Marc has some super old examples of talking to Qt from Gambit. You could
try using that with the new Qt 5 for Android (also experimental I think)
from Digia. Assuming you can setup a sane build environment, that should
work well.


On Fri, May 3, 2013 at 11:02 AM, Adrien Piérard
<pierarda< at >iro.umontreal.ca>wrote:

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Apps with GUI running on android

Adrien Piérard — 2013-05-03T03:02:59

Hi.

I've recently installed gambit on my android phone (
https://play.google.com/store/apps/details?id=org.keithflower.gambit )
and it seems to work fine. I would now like to know if it's possible
to create from this gambit an UI for the apps I want to develop?

I'm not looking at much, I'd just like to be able to print some text,
and then to print a keypad on which to feed data. Something as simple
as http://img.softpile.com/mobile/screenshots/38/2012042621504410.png

So, is it possible?

That webview thing seems to be available, and an old comment at
http://comments.gmane.org/gmane.lisp.scheme.gambit/5285 seems to say
that UIs could be written with it, but I don't really see how.
Assuming I have a form, where do I post to?

If there's another way to run apps written in Gambit and that use a
GUI, I'd be interested to hear about it.

Cheers,

P!

--
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Re: Experiencing freeze error in |##thread-effective-priority-downgrade!| , a btq became self-referencing so all stops, any thoughts on how fix?

Mikael — 2013-05-03T01:35:58

There's no priorities about any of the running threads, or any
configuration beyond thunk, thread-name object and that it was started. The
only thread operation beyond those two is thread-send and -receive.

Pasted and followed up on  https://github.com/feeley/gambit/issues/17 , can
continue there.

Thanks,
Mikael


2013/5/3 Marc Feeley <feeley< at >iro.umontreal.ca>

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Re: Experiencing freeze error in|##thread-effective-priority-downgrade!| ,a btq became self-referencing so all stops, any thoughts on how fix?

Marc Feeley — 2013-05-03T00:58:53

On 2013-05-02, at 8:05 PM, Mikael <mikael.rcv< at >gmail.com> wrote:


Could you describe the threads that are running?  Are they of different priorities, and if so, what are they?

Marc

P.S. For bugs like this, could you use the github issue tracker?  It will simplify tracking the issue.

Experiencing freeze error in |##thread-effective-priority-downgrade!| , a btq became self-referencing so all stops, any thoughts on how fix?

Mikael — 2013-05-03T00:05:13

Hi Marc!


Rarely I get an error that Gambit just stops, while eating up all the CPU
core.

It's so rare that I don't consider it a problem, though I'd be happy to see
it gone of course.

I believe 50% of the time it happens within 5 seconds after Gambit started
and thread-start! was invoked 1-5 times.

I ran into this error now, saw it something like four times in 6mo.

This is on Gambit gsc 4.6.6 on AMD64, compiled from source with
--enable-single-host and some more.

The Gambit session is running a couple of Gambit threads, absolutely
nothing exotic going on.

Had it in a GDB session so could reliably "profile" the error, output from
that GDB session below.

Saved the core file for later reference too.

It's in _thread.scm , and from what I can see it's in
|##thread-effective-priority-downgrade!|'s definition.

What it looks like to me is that by some reason we've got a
self-referencing btq-deq-next chain element, that
keeps it reiterating forever.

I base this on that ___r1 and ___r3 and ___r4 remain con

Re: Github issue tracking

Marc Feeley — 2013-05-02T23:50:15

On 2013-05-02, at 7:13 PM, Mikael <mikael.rcv< at >gmail.com> wrote:


Yes exactly.  I wish there was a way to copy the bugs from the bugzilla system to the github issue tracker, even the closed bugs, so that we could keep an archive of all the bugs.  But I don't have much time to invest in that now.

Marc

Re: Github issue tracking

Mikael — 2013-05-02T23:13:15

2013/4/7 Marc Feeley <feeley< at >iro.umontreal.ca>


So this means anything that used to go to Bugzilla should go to the Github
issue tracker now, and, the Bugzilla is an archive for old things only?


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