[Rubycocoa-talk] Newbie Question: Threads

[Arcadio R. G. <arc...@gm...>]

Hi all,

I'm trying to build a very simple GUI for my Ruby application using  
Cocoa. I have no experience with Cocoa or ObjC, so that might be part  
of the problem.

Anyway, I have a Ruby text application and I would like to add this  
GUI as an observer. So far I have other observers that for instance  
write a log to a file, but none of them are graphical.

My problem is that I need to run the GUI in another thread since when  
I start it, the call to app.run (in the code below) never returns. As  
far as I know, I cannot use Ruby (green) threads.

Note that due to the design my project, I cannot invert control and  
run my application within the thread created by Cocoa. Also, my code  
is not (yet) compatible with Ruby 1.9, so I have to stick to 1.8.

Can anyone point how to execute app.run in another thread in the code  
shown below. I've tried using  
NSThread.detachNewThreadSelector_toTarget_withObject but haven't been  
successful.

Thanks!


require 'osx/cocoa'
include OSX


class AppDelegate < NSObject
   def init
     frame = [200.0, 300.0, 250.0, 100.0]
     @win =  
NSWindow.alloc.initWithContentRect_styleMask_backing_defer(frame,
                                                                        
15, 2, 0)
     @win.setTitle 'Test'
     @win.setLevel 0
     @bar = NSProgressIndicator.alloc.initWithFrame [10.0, 10.0, 80.0,  
80.0]
     @win.contentView.addSubview(@bar)
     @bar.setIndeterminate(false)
     @win.display
     @win.orderFrontRegardless
   end

   def step
     @bar.incrementBy(20)
   end
end


app = NSApplication.sharedApplication
app.setDelegate(AppDelegate.alloc.init)
app.run