Thanks. Murphy's Law said that I 'saw the light' as soon as I sent the message. Happily my solution was the same as the one you sent.
Thanks for the Textmate tip.
Martin

2009/9/7 John Labovitz <johnl@johnlabovitz.com>
On 7 Sep 2009, at 9:45 AM, Martin Hawkins wrote:

I've been going through the MyRecorder example in the QTKit Capture
Programming Guide (which works fine) but am having problems with the MacRuby
syntax for the following:
 - (void)captureOutput:(QTCaptureFileOutput *)captureOutput
  didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
  forConnections:(NSArray *)connections
  dueToError:(NSError *)error


I don't see anything tricky here that would make this difficult to implement in MacRuby:

       def captureOutput(captureOutput, didFinishRecordingToOutputFileAtURL: outputFileURL, forConnections: connections, dueToError: error)
               ...
       end

(Note that I cheated here: I copied the ObjC method signature and used TextMate's "m<tab>" function to automatically convert it to MacRuby!)

--John
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