// DroneController.hx
if(mause.started()){
x = pickClosest(mause)
if(x.distanceIsOk && x.hasTrait("Pickable")){ // not to far
    x.getTrait(Pickable).pick();
}
}

// Pickable.hx - add to all buttons, set values - 1,2,3.. clear, back
class Pickable {
  @prop
  public var value: string = null;
  public var signal: Signal;

  new(){
    signal = new Signal()<String>;
  }

  fn pick(){
   if(value) signal.dispatch(value);
  }
}

// DoorController.hx

....

onInit(){
  for(x in allButtons){
   y = x.getTrait(Pickable);
   // can also set value here y.value = 'xxxx';
   y.signal.add(function(value: string){ // so we can also remove later
      this.registerButtonPress(x, value);
   });
  }
}

registerButtonPress(btn, value){
  doorDisplayTr = object.getChild('display..').getTrait('DoorDisplay'); /// better on init once
  switch value {
    enterArray.push(something);// Populate arr orsmth
    Event.send()//for anim
    doorDisplayTr.chaneCode(enterArray);
  }
}