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

isaac kearse isaackearse at gmail.com
Tue May 19 18:10:14 PDT 2009 

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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