Laurent you are right, however I noticed a little gotcha:

If you use the following code:

    panel.beginSheetModalForWindow window, completionHandler: Proc.new do |result|
      return if (result == NSCancelButton)
      path = panel.filename
      dest_path = applicationSupportFolder
      guid = NSProcessInfo.processInfo.globallyUniqueString
      dest_path = "#{dest_path}/#{guid}"
      error = Pointer.new(:id)
      NSFileManager.defaultManager.copyItemAtPath(path, toPath:dest_path, error:error)
      NSApp.presentError(error) if error[0]
      movie.setValue(dest_path, forKey:"imagePath")
    end

You get an argument error: tried to create Proc object without a block (ArgumentError)

However using the curly brackets would work:

panel.beginSheetModalForWindow window, completionHandler: Proc.new{|result|
      return if (result == NSCancelButton)
      path = panel.filename
      dest_path = applicationSupportFolder
      guid = NSProcessInfo.processInfo.globallyUniqueString
      dest_path = "#{dest_path}/#{guid}"
      error = Pointer.new(:id)
      NSFileManager.defaultManager.copyItemAtPath(path, toPath:dest_path, error:error)
      NSApp.presentError(error) if error[0]
      movie.setValue(dest_path, forKey:"imagePath")
}

Finally, the only way to get the do/end proc approach to work is to use the parenthesis around the arguments:

   panel.beginSheetModalForWindow(window, completionHandler: Proc.new do |result|
      return if (result == NSCancelButton)
      path = panel.filename
      dest_path = applicationSupportFolder
      guid = NSProcessInfo.processInfo.globallyUniqueString
      dest_path = "#{dest_path}/#{guid}"
      error = Pointer.new(:id)
      NSFileManager.defaultManager.copyItemAtPath(path, toPath:dest_path, error:error)
      NSApp.presentError(error) if error[0]
      movie.setValue(dest_path, forKey:"imagePath")
   end)

- Matt

On Sun, Jan 9, 2011 at 2:22 PM, Laurent Sansonetti <lsansonetti@apple.com> wrote:

Hi Rolando,

The syntax is simple, you simply pass a Proc project.

Here is an example:

framework 'Foundation'
a = [1, 2, 3, 4, 5]
a.enumerateObjectsUsingBlock(Proc.new { |obj, index, stop|

p obj
stop.assign(true) if index == 2
})

It looks like the snippet you pasted should just work. Did you find a problem?

Laurent

On Jan 9, 2011, at 8:09 AM, Rolando Abarca wrote:

Hi all,

I've taken a look at the referred issue (#712), but I'm not sure of
the final implemented syntax. I'm trying to use a NSOpenPanel, so far
this is what I'm doing:

{{{
def loadSprite(sender)
   @panel.beginSheetModalForWindow(@window, completionHandler:lambda { |code|
   NSLog("code: #{code}")
   })
end
}}}

what's the Right Way(tm) to use a NSOpenPanel?
thanks!
--
Rolando Abarca M.
Games For Food S.p.A.
http://www.gamesforfood.com
Phone: +1 (408) 345-5433
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