/// <summary>
/// Ask the current state if the state needs to be changed
/// and change the state accordingly
/// </summary>
private void CheckForNewState()
{
//Holds the instance of the state that is to
//be changed to. And if it should be a popUp
//or not
var newState = _currentState.ChangeState;
var popUp = _currentState.PopUpState;
//If the newState is null, there will not be any state change,
//and therefore we will return
if (newState == null) return;
if (popUp && !_pausedStates.Contains(newState))
{
//Remember the current state
_pausedStates.Push(_currentState);
//Pause the current state
_currentState.Pause();
//Change the state to the new state
_currentState = newState;
//Show the new state
_currentState.Show();
}
else
{
//Check if the newState is in the pause stack and hide the
//states that is between the current and the new state
State pausedState = null;
while (_pausedStates.Count > 0)
{
pausedState = _pausedStates.Pop();
if (pausedState == newState)
break;
pausedState.Hide();
pausedState = null;
}
//Hide the current state
_currentState.Hide();
//set the new state to the current state
_currentState = newState;
//Resume the current state if it was found in the paused states
//else start it from the begining through show()
//If pausedState != null then the newState exists in the _pausedStates
if (pausedState != null)
_currentState.Resume();
else
_currentState.Show();
}
}