title: Detecting a long press on openlayers map
body: <p>I have a map that presently catches the double-click event and fires some code to set a waypoint on the map and it works great.  </p>
  
  <p>What I'd really like to do is detect a long press for tablet/mobile users as I think the double-click method (which is working fine on my ipad) is not as precise as it is with a mouse pointer.  I assume that I'll have to somehow tie in to onmousedown/onmouseup and set a timer/threshold but I'm struggling to get something like this working. </p>