title: How to know if its zoom in or zoom out on flex/air TransformGestureEvent
body: <p>Using flex / air 2.6 working on an Android device, I am using a canvas with a TransformGestureEvent for zoom in on a map. The listening of the efect is working ok, but I can´t seem to find the information on wether the user intended zoom in or zoom out (fingers getting closer or getting apart).</p>
  
  <p>I expected the intention of the gesture to be identifiable with the offsetX and offsetY properties of the event, as you will do on a swipe gesture event. But I always get 0 for both properties, no matter how I do the gesture in the device.</p>
  
  <p>How can I know if the fingers getting closer or getting apart in a gesture zoom event?</p>
  
  <p>Thanks</p>
  
  <p>Maria</p>