// 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 / dynamic? = null;
  public var callback: Void->Void = null; // Or use events, but they suck?

  fn pick(){
   if(value && callback) callback(value);
  }
}

// DoorController.hx

....

onInit(){
  for(x in allButtons){
   y = x.getTrait(Pickable);
   // can also set value here y.value = 'xxxx';
   y.callback = function(value: string){
      this.registerButtonPress(value);
   }
  }
}

registerButtonPress(value){
  switch value {
    // Do shit
  }
}