StageXL for Dart

void registerMouse() {
  var mouseEventListener = (MouseEvent me) {
      var deltax = me.localX - 203;
      var deltay = me.localY - 111;
      num angle_rad = math.atan2(deltay,deltax);
      
      particleEmitter.updateConfig(newAngle((angle_rad*180.0/math.PI)+180, me.localX));
  };
  glassPlate.onMouseDown.listen(mouseEventListener);
  glassPlate.onMouseMove.listen(mouseEventListener);
}