"Warning: 1090: migration problem" despite explicit registration of event handlers

Question

I have a game engine class that inherits from MovieClipand handles mouseDown events in a private instance method. For simplicity, I call an event handler onMouseDown. It looks like this:

private function onMouseDown(e:MouseEvent):void
{
    if (_isEnginePlaying)
    {
        _player.attack();
    }
}

I will register it in the class method init(addToStage handler itself), which looks like this:

private function init(e:Event):void
{
    removeEventListener(Event.ADDED_TO_STAGE, init);
    // ...
    stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
    // ...
}

This compiles and works correctly, but the compiler warns:

Warning: 1090: Migration issue: the onMouseDown event handler does not automatically start Flash Player at run time in ActionScript 3.0. You must first register this handler for the event using addEventListener ('mouseDown', callback_handler).

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Answer 1

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• onMouseDown. "on-on" AS2, , ; , . Adobe "-Handler" ( 1 2 3), onMouseDown mouseDownHandler:

  private function init(e:Event):void
  {
      removeEventListener(Event.ADDED_TO_STAGE, init);
      // ...
      stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
      // ...
  }
  
  private function mouseDownHandler(e:MouseEvent):void
  {
      if (_isEnginePlaying)
      {
          _player.attack();
      }
  }
  

• this , this :

  private function init(e:Event):void
  {
      removeEventListener(Event.ADDED_TO_STAGE, init);
      // ...
      addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
      // ...
  }
  

  this, .

• , , , , . - , , , , , , this, :

  private function stage_onMouseDown(e:MouseEvent):void
  {
      if (_isEnginePlaying)
      {
          _player.attack();
      }
  }
  

• , , , , , , , , .