Gesture detection: Identifying global events

gistfile1.js

  // Add event listeners
  surface.addEventListener('MSPointerDown', function(event) {
    // Add pointer to track
    msGesture.addPointer(event.pointerId);
  });
  // Reset when gesture starts 
  surface.addEventListener('MSGestureStart', resetGesture);
  // Try to detect when gesture changes
  surface.addEventListener('MSGestureChange', detectGesture);