Re: [Rubycocoa-talk] Calling Ruby from existing Cocoa App

[David <dba...@gm...>]

Thanks for the explanation..  I also spent some time investigating it =20=

last night (probably because I'm stubborn :) ) and was able to come =20
to a similar result.  I started an entry on the RubyCocoa Wiki so =20
that it will be easier for anybody in the future to not have to spend =20=

time figuring out what to do..  Feel free to edit it or add this info =20=

to your documentation..

The easier it is for a newby to get this stuff to work the more =20
people there will be using it.  I originally tried getting PyObjc to =20
work and even asked on the mailing list but never got a =20
straightforward answer on how to make the bridge transparent..  =20
especially as transparent as the Ruby-Obj-C bridge appears to be.. :) =20=

So now I'm using Ruby instead..

David

On Jan 31, 2006, at 12:46 AM, Tim Burks wrote:

> Hi David,
>
> Thanks for your comments on the documentation.
>
> I too have wanted to mix RubyCocoa into an existing application, but I
> hadn't tried it until this evening, when I successfully converted one
> of my pure Objective-C Cocoa projects to RubyCocoa.  Here's my story:
>
> First I added the RubyCocoa framework to the project in Xcode. In my
> case, I right-clicked on the project name in the Groups & Files panel
> in Xcode, then selected Add->Existing Frameworks... and navigated to
> /Library/Frameworks/RubyCocoa.framework.
>
> Next I replaced the contents of main.m with the following, taken from
> the RubyCocoa Xcode templates:
> ---
> #import <RubyCocoa/RBRuntime.h>
>
> int main(int argc, const char *argv[])
> {
>     return RBApplicationMain("rb_main.rb", argc, argv);
> }
> ---
> This is necessary to make sure that Ruby is properly initialized and
> it also gives you a way to run some Ruby code when your  program
> starts.   As far as I know, you *must* replace your main() to use
> RubyCocoa, but you probably didn't have anything special there anyway
> -- just a call to NSApplicationMain, which your converted app will
> make with Ruby.
>
> Then I added rb_main.rb to my project using Add->Existing Files... and
> then finding and selecting one from a template-based RubyCocoa
> application.  For reference, this short file contains the following
> Ruby code:
> ---
> require 'osx/cocoa'
>
> def rb_main_init
>   path =3D OSX::NSBundle.mainBundle.resourcePath.to_s
>   rbfiles =3D Dir.entries(path).select {|x| /\.rb\z/ =3D~ x}
>   rbfiles -=3D [ File.basename(__FILE__) ]
>   rbfiles.each do |path|
>     require( File.basename(path) )
>     OSX::NSLog "require #{File.basename(path)}"
>   end
> end
>
> if $0 =3D=3D __FILE__ then
>   rb_main_init
>   OSX.NSApplicationMain(0, nil)
> end
> ---
> It loads any ruby files in your application's resource directory and
> then calls NSApplicationMain.
>
> Then I built and tested my application.  Everything seemed to work
> just as before, but now my formerly mild-mannered Objective-C program
> can speak Ruby.
>
> =46rom here forward, you can add Ruby files to your application and =
know
> that all inline code in them will get executed when rb_main_init loads
> the files during startup.
>
> In my case, I added a console object that I've been writing/debugging
> that let's me run irb inside a Cocoa app.  Accessing my Objective-C
> objects was a puzzle at first, but I managed to get to my top-level
> document object (a game) from the NSDocumentController:
>> game_controller =3D =
OSX::NSDocumentController.sharedDocumentController
>> game =3D game_controller.documents.objectAtIndex(0)
>
> =46rom there, I could directly call the methods of my object from =
Ruby:
>> game.start
>> game.sendEvent_forPlayer(10, 0)
>> game.stop
>
> I'll test it more in the next few days, but as far as I can tell, the
> transplant went smoothly.
>
> Hope that helps,
>
> Tim
>
>
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