preAdd method

  1. @mustCallSuper
void preAdd(
  1. Component c

This method is called for every component added, both via add and addLater methods.

You can use this to setup your mixins, pre-calculate stuff on every component, or anything you desire. By default, this calls the first time resize for every component, so don't forget to call super.preAdd when overriding.


void preAdd(Component c) {
  if (c is Tapable) {
      this is HasTapableComponents,
      'Tapable Components can only be added to a BaseGame with HasTapableComponents',

  if (debugMode() && c is PositionComponent) {
    c.debugMode = true;

  if (c is HasGameRef) {
    (c as HasGameRef).gameRef = this;

  // first time resize
  if (size != null) {

  if (c is ComposedComponent) {