[MacRuby-devel] Mixing Objective-C and Ruby classes

isaac kearse isaackearse at gmail.com
Wed May 20 02:53:35 PDT 2009 

Hi Brian,

I tried running your minimal app but it crashed with a similar error.  Here
are all the gory details (including Problem Details and System Profile from
the crash reporter):
http://gist.github.com/114723

I have also put the whole directory structure for the minimal hotcocoa app
on github so we can be sure we are running exactly the same app:
http://github.com/isaac/shortcut/tree/master
I also got a few more warnings when compiling shortcut.m but I am assuming I
can just ignore them? (I included them at the bottom of the gist also)

Cheers,
Isaac

On Wed, May 20, 2009 at 1:10 PM, isaac kearse <isaackearse at gmail.com> wrote:

> Yeah I think you're right.  I was calling it inside a hotcocoa app but not
> in the application context.  I'll try it out tonight and let you know how it
> goes.
> Thanks a lot for walking me through this.
>
> On Wed, May 20, 2009 at 12:47 PM, Brian Chapados <chapbr at gmail.com> wrote:
>
>> I'm not sure how you're testing this, but beware of doing this from a
>> command line-only script or through macirb.  I suspect you need to be
>> in an Application context (or hook into the event loop through some
>> other means).  It works from a minimal hotcocoa app:
>> http://gist.github.com/114523
>>
>> I also made some slight modifications to your Obj-C code to add a
>> delegate that gives you a callback hook that you can define in Ruby.
>> There is probably a better way to do this, but this was fast.
>> see: http://gist.github.com/114521
>>
>> Note that I changed the keyboard shortcut to controlKey+optionKey, so
>> you'll need to press Control+Option+Space.
>>
>>
>> On Tue, May 19, 2009 at 4:33 PM, isaac kearse <isaackearse at gmail.com>
>> wrote:
>> > Hey thanks Brian that worked!
>> > I tried compiling with the Carbon Framework but I didn't think to try it
>> > with both Carbon and Foundation.  I still got the warning "makes pointer
>> > from integer without a cast" but I'm just ignoring that :)
>> > So the bundle was created and I compiled it and required it my app.
>> > But when I actually call it with "Shortcut.new.addShortcut" (from the
>> start
>> > method in my application.rb) I get a nasty error:
>> > isaac:~/src/tasks isaac$ macrake
>> > (in /Users/isaac/src/tasks)
>> >
>> /Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:12:
>> > [BUG] Segmentation fault
>> > MacRuby version 0.4 (ruby 1.9.1) [universal-darwin9.0, x86_64]
>> > -- stack frame ------------
>> > 0000 (0xc08000060): 00000004
>> > 0001 (0xc08000068): 00000000
>> > 0002 (0xc08000070): 00000004
>> > 0003 (0xc08000078): 00000000
>> > 0004 (0xc08000080): 00000004
>> > 0005 (0xc08000088): 00000000
>> > 0006 (0xc08000090): 00000004
>> > 0007 (0xc08000098): 80003ffe0
>> > 0008 (0xc080000a0): 00000004
>> > 0009 (0xc080000a8): 00000000
>> > 0010 (0xc080000b0): 00000004
>> > 0011 (0xc080000b8): 00000000
>> > 0012 (0xc080000c0): 00000004
>> > 0013 (0xc080000c8): 00000000
>> > 0014 (0xc080000d0): 8004f3380
>> > 0015 (0xc080000d8): 00000004
>> > 0016 (0xc080000e0): 00000000
>> > 0017 (0xc080000e8): 8004eb020
>> > 0018 (0xc080000f0): 00000004
>> > 0019 (0xc080000f8): 00000000 <- lfp <- dfp
>> > -- control frame ----------
>> > c:0008 p:---- s:0020 b:0020 l:000019 d:000019 CFUNC  :addShortcut
>> > c:0007 p:0019 s:0017 b:0017 l:000016 d:000016 METHOD
>> >
>> /Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:12
>> > c:0006 p:0103 s:0014 b:0014 l:000013 d:000013 TOP
>> >
>>  /Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:297
>> > c:0005 p:---- s:0012 b:0012 l:000011 d:000011 FINISH :set_encoding:
>> > c:0004 p:---- s:0010 b:0010 l:000009 d:000009 CFUNC  :load
>> > c:0003 p:0043 s:0006 b:0006 l:000005 d:000005 TOP
>> >  /Users/isaac/src/tasks/Tasks.app/Contents/Resources/rb_main.rb:2
>> > c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :inherited:
>> > c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP
>> > ---------------------------
>> > DBG> :
>> >
>> "/Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:12:in
>> > `addShortcut'"
>> > DBG> :
>> >
>> "/Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:12:in
>> > `start'"
>> > DBG> :
>> >
>> "/Users/isaac/src/tasks/Tasks.app/Contents/Resources/lib/application.rb:297:in
>> > `<top (required)>'"
>> > DBG> :
>> "/Users/isaac/src/tasks/Tasks.app/Contents/Resources/rb_main.rb:2:in
>> > `load'"
>> > DBG> :
>> "/Users/isaac/src/tasks/Tasks.app/Contents/Resources/rb_main.rb:2:in
>> > `<main>'"
>> > -- backtrace of native function call (Use addr2line) --
>> > 0x10010f2c1
>> > 0x100029334
>> > 0x100029418
>> > 0x1000c240d
>> > 0x7fff803763fa
>> > 0x0
>> > 0x7fff8108094d
>> > 0x105a31e8c
>> > 0x100121855
>> > 0x10010af7d
>> > 0x10010074f
>> > 0x1001056e2
>> > 0x10010596c
>> > 0x100030c96
>> > 0x100030d15
>> > 0x10010ada7
>> > 0x10010074f
>> > 0x1001056e2
>> > 0x10010596c
>> > 0x10002cd32
>> > 0x1000300f7
>> > 0x100118723
>> > 0x100000f84
>> > 0x100000f40
>> > -------------------------------------------------------
>> > Any ideas?
>> > Cheers,
>> > Isaac
>> > On Wed, May 20, 2009 at 10:59 AM, Brian Chapados <chapbr at gmail.com>
>> wrote:
>> >>
>> >> Those symbols are defined in the Carbon framework. Try compiling with:
>> >>
>> >> cc shortcut.m -o shortcut.bundle -g -framework Foundation -framework
>> >> Carbon -dynamiclib -fobjc-gc -arch i386 -arch x86_64
>> >>
>> >> On Tue, May 19, 2009 at 1:32 PM, isaac kearse <isaackearse at gmail.com>
>> >> wrote:
>> >> > Hi Guys,
>> >> > I am writing a hotcocoa app, and I want to register a global keyboard
>> >> > shortcut so that I can perform an action in my app from any
>> application.
>> >> > AFAIK you need to go down to Carbon to do this as documented here:
>> >> >
>> >> >
>> http://cocoasamurai.blogspot.com/2009/03/global-keyboard-shortcuts-with-carbon.html
>> >> > This is the code I have so far: http://gist.github.com/114372
>> >> > When I try and package this as a bundle using the technique that
>> Laurent
>> >> > demonstrated earlier in this thread I get these errors:
>> >> > isaac:~/src/tasks isaac$ gcc shortcut.m -o shortcut.bundle -g
>> -framework
>> >> > Foundation -dynamiclib -fobjc-gc -arch i386 -arch x86_64
>> >> > shortcut.m: In function ‘-[Shortcut addShortcut]’:
>> >> > shortcut.m:25: warning: passing argument 1 of ‘InstallEventHandler’
>> >> > makes
>> >> > pointer from integer without a cast
>> >> > shortcut.m:28: warning: passing argument 4 of ‘RegisterEventHotKey’
>> >> > makes
>> >> > pointer from integer without a cast
>> >> > Undefined symbols:
>> >> >   "_GetApplicationEventTarget", referenced from:
>> >> >       -[Shortcut addShortcut] in cckmYEc0.o
>> >> >       -[Shortcut addShortcut] in cckmYEc0.o
>> >> >   "_RegisterEventHotKey", referenced from:
>> >> >       -[Shortcut addShortcut] in cckmYEc0.o
>> >> >   "_InstallEventHandler", referenced from:
>> >> >       -[Shortcut addShortcut] in cckmYEc0.o
>> >> > ld: symbol(s) not found
>> >> > collect2: ld returned 1 exit status
>> >> > Undefined symbols:
>> >> >   "_GetApplicationEventTarget", referenced from:
>> >> >       -[Shortcut addShortcut] in ccIWfnrB.o
>> >> >       -[Shortcut addShortcut] in ccIWfnrB.o
>> >> >   "_RegisterEventHotKey", referenced from:
>> >> >       -[Shortcut addShortcut] in ccIWfnrB.o
>> >> >   "_InstallEventHandler", referenced from:
>> >> >       -[Shortcut addShortcut] in ccIWfnrB.o
>> >> > ld: symbol(s) not found
>> >> > collect2: ld returned 1 exit status
>> >> > lipo: can't open input file:
>> >> > /var/folders/sm/smWEZrv7GueXZu2JpgAAuU+++TI/-Tmp-//ccX5Acy0.out (No
>> such
>> >> > file or directory)
>> >> > I really have no idea what I'm doing here, so any ideas would be
>> >> > appreciated
>> >> > :)
>> >> > Cheers,
>> >> > Isaac
>> >> > On Mon, Apr 20, 2009 at 11:49 PM, victor jalencas
>> >> > <macruby-devel at principia.info> wrote:
>> >> >>
>> >> >> Many thanks John and Laurent.
>> >> >>
>> >> >>  After reading your messages I came back to XCode and discovered I
>> had
>> >> >> made a typo in the ObjC part of the code (which, curiously,
>> compiled)
>> >> >> and that's why my ruby code didn't find my selector.
>> >> >>
>> >> >>  As for calling ruby code from the obj-c side, I agree it's a bit
>> >> >> convoluted (not to mention deprecated). I hope there's a better way
>> to
>> >> >> do that in store for upcoming versions. If I understood well your
>> >> >> example, you first created the Obj-C subclass and later,
>> dynamically,
>> >> >> set its parent to be the ruby class. Anyway, seeing that the norm in
>> >> >> Cocoa is delegation rather than extension, and if all ruby classes
>> are
>> >> >> readily available in Obj-C, I think I'll manage with just calling
>> ruby
>> >> >> code instead of extending it. Apparently I lacked only calling the
>> >> >> sharedRuntime method, will need to experiment a bit more when I get
>> >> >> back to my Mac.
>> >> >>
>> >> >>
>> >> >>
>> >> >> cheers,
>> >> >> Victor
>> >> >>
>> >> >> --
>> >> >> --
>> >> >> Victor Jalencas <victor at carotena.net>
>> >> >> _______________________________________________
>> >> >> MacRuby-devel mailing list
>> >> >> MacRuby-devel at lists.macosforge.org
>> >> >> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>> >> >
>> >> >
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>> >> >
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