Std barcode reader - keyboardevent for stream of chars - help :(

Question

Hi all,
It's the very first time for me in adobe forum so.. hi everyone
I've got a question related to my air application. This application has many controls like textinput button etc. etc.
I would like to catch a barcode (a very fast keyboard stream of chars) in the main application (this isn't a problem I already can do this) and, if it is a barcode then i would like to stop the propagation of the chars otherwise the propagation of the chars continue as usual
In order to catch the stream of chars I've used a timer, restarted every time i retrieve a character, if this timer expire and I have collect more the 5 chars I suppose the chars collected could be a barcode otherwise the chars (if they are less than 5) should be normal character from the user that use a keyboard
the effect is:
first case:
a fast keyboard chars coming (a.. ok this is a barcode)
stops the writing for example in the related textinput that has focus
elaborate the barcode
second case:
a character or two is arrived from the keyboard (ok this isn't a barcode)
continue with propagation and the related textinput show the character
is this possible?
I've tryed it.. but I can't find the solution, could anyone help me?
thank you
edit: if it isn't clear, please let me know, I can try to explain the problem in a better way

Answer 1

I tried to made some other test.
first test -------------
here I tried to record all the 3 events (i report only the script part)
<fx:Script>
     <![CDATA[
          import mx.events.FlexEvent;
          import spark.components.Application;
          var eventArray:Array  = new Array()
          var t:Timer = new Timer(5000)
          private function init():void
               NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, appKeyDown, true);
               NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_UP, appKeyUp, true);
               NativeApplication.nativeApplication.addEventListener(TextEvent.TEXT_INPUT, textinput, true);
          private function appKeyUp(e:KeyboardEvent):void
               trace("appKeyUp")
               var evttmp:KeyboardEvent = new KeyboardEvent(KeyboardEvent.KEY_UP)
               evttmp = e.clone() as KeyboardEvent
               eventArray.push(evttmp);
               e.stopPropagation()
               e.preventDefault()
          private function textinput(e:TextEvent):void
               trace("textinput")
               var evttmp:TextEvent = new TextEvent(TextEvent.TEXT_INPUT)
               evttmp = e.clone() as TextEvent
               eventArray.push(evttmp);
               e.stopPropagation()
               e.preventDefault()
          private function appKeyDown(e:KeyboardEvent):void
               trace("appKeyDown")
               var evttmp:KeyboardEvent = new KeyboardEvent(KeyboardEvent.KEY_DOWN)
               evttmp = e.clone() as KeyboardEvent
               eventArray.push(evttmp);
               t.addEventListener(TimerEvent.TIMER, timerout)
               t.start()
               e.stopPropagation()
               e.preventDefault()
          private function timerout(e:TimerEvent):void
               trace("timerout")  
               t.stop()
               NativeApplication.nativeApplication.removeEventListener(KeyboardEvent.KEY_DOWN, appKeyDown, true);
               NativeApplication.nativeApplication.removeEventListener(KeyboardEvent.KEY_UP, appKeyUp, true);
               NativeApplication.nativeApplication.removeEventListener(TextEvent.TEXT_INPUT, textinput, true);
               for(var i:int=0; i<eventArray.length; i++)
                    barcodeField.dispatchEvent(eventArray[i])
               NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, appKeyDown, true);
               NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_UP, appKeyUp, true);
               NativeApplication.nativeApplication.addEventListener(TextEvent.TEXT_INPUT, textinput, true);
     ]]>
</fx:Script>
the textinput event is never catch.
then I tried writing textinput event myself (in order to try if something appens) but I wasn't lucky
second test ---------
private function timerout(e:TimerEvent):void
     trace("timerout")  
     t.stop()
     NativeApplication.nativeApplication.removeEventListener(KeyboardEvent.KEY_DOWN, appKeyDown, true);
     NativeApplication.nativeApplication.removeEventListener(KeyboardEvent.KEY_UP, appKeyUp, true);
     barcodeField.dispatchEvent(eventArray[0])
     var text:TextEvent = new TextEvent(TextEvent.TEXT_INPUT, true, false, bcd);
     barcodeField.dispatchEvent(text);
     barcodeField.dispatchEvent(eventArray[1])