public void AddObserver(ITetrisStateObserver observer)
{
if (!_observers.Contains(observer))
{
_observers.Add(observer);
}
}
/*
* Removes a game state observer from the list of observers to notify.
*/
public void RemoveStateObserver(ITetrisStateObserver observer)
{
_stateLogic.RemoveObserver(observer);
}
public void RemoveObserver(ITetrisStateObserver observer)
{
_observers.Remove(observer);
}
/*
* Enables an object to be updated of changes in game state.
* Attaching an observer is necessary for implementing a Tetris front-end since that is, for example,
* how updates to the game board are made accessible.
* Remember to call RemoveStateObserver if you want your observer to die before this tetris game dies.
*/
public void AddStateObserver(ITetrisStateObserver observer)
{
_stateLogic.AddObserver(observer);
}