Gambit-iphone Juillet 2009

gambit-iphone@iro.umontreal.ca

8 participants
4 discussions

Touch Translation
by Ryan Spangler 20 Jul '09

20 Jul '09

Hey all, I was looking into porting the touch events into gambit, but I am pretty new to gambit and the c ffi specifically. The touch events are somewhat complex, taking an NSSet * and a UIEvent *. From what I can tell, the NSSet contains all current touch points (so if you have three fingers down, the NSSet contains three touch points) and the UIEvent has a history of all the touch points and where they have been since the first "touchesBegan" event, though I am not sure of the specific structure of these objects yet. I am wondering what is the best way to translate these into scheme data structures? Thanks for any guidance on this, and I also noticed that James was talking about working on touch facilities as well. Maybe we could join forces on this? Or maybe you are already done? - Ryan

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emacs/slime repl integration
by Ryan Spangler 17 Jul '09

17 Jul '09

So after using the repl for some time, it has become clear that it needs to be integrated into emacs. For one, copy/paste on the mac doesn't work with X11, and beyond that, if it was in emacs I could develop the whole program in the repl, and save the relevant bits to a file afterwards. An ideal way to develop. I'm not too up on emacs internals, anyone have any idea what it would take? Could slime read from the repl's port? If we are lucky this wouldn't even be too much work, I am just wondering how to begin? Any guidance would be greatly appreciated, thanks! - Ryan

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Trouble getting the Gambit iPhone example app running
by Guillaume Germain 15 Jul '09

15 Jul '09

Hi all, I've been trying to get James' example Gambit/iPhone application running without much success. Currently, when I run the application in the simulator, the following things happen based on the "hardware version" of the simulator: - Version 2.0: crash ("The application tosser quit unexpectedly...") - Version 2.1, 2.2 and 2.2.1: simulator returns to main menu after about a second - Version 3.0: simulator just stand there with a black screen, nothing is shown. I'm on Mac OS X 10.5.7, using the latest iPhone SDK (iphone_sdk_3.0__leopard__9m2736__final.dmg) Here's what I did: * Installed Gambit-C - downloaded the latest Gambit development tarball (gambc-v4_4_4-devel.tar.gz) - exported the CC variable with the following statement: export CC='/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator2.0.sdk' - did a "./configure --prefix=/usr/local/Gambit-C/iPhoneSimulator && make && sudo make install" * Retrieved James' example from github - did "git clone git://github.com/jlongster/gambit-iphone-example.git" - In Makefile: -- changed the commented version of the 'gcc' and 'sdk' variables to use those for the simulator -- removed the comment at the end of line 46 ("app_name=tosser.app # You'll probably have to customize some of these") because the comment is interfering with the definition of the variable 'app_name' and breaking the "tosser.app" target. - Did a "make deploy", started the simulator (the "tosser" app is there with a white icon) and when I try to run it I get the result described above. I've tried multiple things (pointing to a different version of the SDK, like 2.2, 3.0, etc). but I keep getting the same result (except with SDK 3.0 where the example doesn't build right now). I was wondering whether anybody else ran into the same problem and had a solution... Am I supposed to be running a remote debugger at the same time in order to see something happen? Is there something else I'm doing wrong? Thanks in advance, Guillaume

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Re: [Gambit-iphone] Touch Translation
by Ryan Spangler 13 Jul '09

13 Jul '09

Andrew: Aha! I was wondering how to keep track of which touch is which, did not realize you could get the id of the object as an integer and use that as a key (I've programmed in scheme forever, but learning objective-c now). I was just passing the x and y of a single touch across, and ignoring multiple touches. Thanks! I would be curious to see the code. James: That sounds great. I am wondering what your strategy is for exposing an objective-c object to scheme like that, as so far I have only been able to send basic data types (int, double etc) between c and scheme. Something like keeping some reference to the c object and implementing the various methods in scheme? In particular, I would like to make a list of x,y pairs that get sent from the c event handler to the corresponding scheme function, is that possible? I imagine there could be some way to construct scheme lists from c, but not sure how that could be done at the moment. As I say, I am still learning the ropes around here. Thanks for the replies! - Ryan --- On Sun, 7/12/09, James Long <longster(a)gmail.com> wrote: From: James Long <longster(a)gmail.com> Subject: Re: [Gambit-iphone] Touch Translation To: "Andrew Andkjar" <andkjar(a)obtech.net> Cc: "Ryan Spangler" <patch_work8848(a)yahoo.com>, "gambit-iphone(a)iro.umontreal.ca" <gambit-iphone(a)iro.umontreal.ca> Date: Sunday, July 12, 2009, 11:54 AM Hey Ryan, I have not worked much on access to Touch events yet, and you're probably looking for specific FFI code as an example. Andrew, it would be great if you could share your code! I was thinking of exposing access to the UITouch and other event objects so that you could benefit from the normal Cocoa API. When I do this, I will share this code. Thanks, James On Sun, Jul 12, 2009 at 1:30 PM, Andrew Andkjar<andkjar(a)obtech.net> wrote: > In the iPhone app I'm developing I am currently traversing the set of touch > events in Objective-C and calling into touch-<began | moved | ended> > Gambit-C callbacks I've defined that take an integer touch id and x,y > coordinates. Active touches are tracked in Scheme in a hash table keyed on > touch id. This has been suiting my multi-touch tracking needs so far. I'd > be happy to share some code if there's interest. > 'AA > On Jul 11, 2009, at 6:03 PM, Ryan Spangler <patch_work8848(a)yahoo.com> wrote: > > Hey all, > > I was looking into porting the touch events into gambit, but I am pretty new > to gambit and the c ffi specifically. The touch events are somewhat > complex, taking an NSSet * and a UIEvent *. From what I can tell, the NSSet > contains all current touch points (so if you have three fingers down, the > NSSet contains three touch points) and the UIEvent has a history of all the > touch points and where they have been since the first "touchesBegan" event, > though I am not sure of the specific structure of these objects yet. I am > wondering what is the best way to translate these into scheme data > structures? > > Thanks for any guidance on this, and I also noticed that James was talking > about working on touch facilities as well. Maybe we could join forces on > this? Or maybe you are already done? > > - Ryan > > > _______________________________________________ > Gambit-iphone mailing list > Gambit-iphone(a)iro.umontreal.ca > https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-iphone > > _______________________________________________ > Gambit-iphone mailing list > Gambit-iphone(a)iro.umontreal.ca > https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-iphone > >

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Gambit-iphone Juillet 2009