implementing GDC with applescriptobjc - multithreading

Question

I am making this simple ApplescriptObjC cocoa app just as an exercise for me to understand the multi treading, it is a text field and a label, I was trying to update the label in real time while typing in the text field, but it only get updated once I press enter but not in real time, any idea how I can make that work? here is the code.
Thanks
script AppDelegate
property parent : class "NSObject"
property prgLabel: missing value
property subjectFeild: missing value
on applicationWillFinishLaunching_(aNotification)
-- Insert code here to initialize your application before any files are opened
activate
end applicationWillFinishLaunching_
on applicationShouldTerminate_(sender)
-- Insert code here to do any housekeeping before your application quits
return current application's NSTerminateNow
end applicationShouldTerminate_
on textChange_(sender)
set SU to subjectFeild's stringValue() as string
prgLabel's setStringValue_(SU)
end textChange_
end script

Answer 1

1) Set the delegate of the textfield to be your app delegate.
2) Implement controlTextDidChange, which is called every time the text field changes during editing.
script AppDelegate
property parent : class "NSObject"
-- IBOutlets
property theWindow : missing value
property prgLabel: missing value
property subjectFeild: missing value
on applicationWillFinishLaunching:aNotification
subjectFeild's setDelegate:me
end applicationWillFinishLaunching_
on controlTextDidChange:notification
prgLabel's setStringValue:subjectFeild's stringValue()
end
end script