title: Can a Marionette.js Behavior trigger an Event?
body: <p>I have a Behavior in Marionette that handles the logic for detecting swipe events. My subviews each incorporate this behavior to know when a swipe gesture has occurred on them. My question is once my Behavior has determined a swipe has occurred, how does it get this information out to its View? </p>
  
  <p>Even better if the Behavior could trigger some event that could be listened for, not by its corresponding View but by the Layout View (the parent view). </p>
  
  <p>Is this sort of thing possible? Thanks!</p>