Practical Template Programming - Learn C++ for Game Development - page 206

bool playerWon = false;
while (m_playerQuit == false && playerWon == false)
{
GivePlayerOptions();
stringstream playerInputStream;
GetPlayerInput(playerInputStream);
EvaluateInput(playerInputStream);
playerWon = m_dragon.IsAlive() == false && m_orc.IsAlive() == false;
}
if (playerWon == true)
{
cout << "Congratulations, you rid the dungeon of monsters!" << endl;
cout << "Type goodbye to end" << endl;
std::string input;
cin >>input;
}
DetachEvent(QuitEvent, this);
delete EventManager::GetSingletonPtr();
}
The RunGame method now has code to create an EventManager , to register the QuitEvent , and to
attach itself as a listener for that event. The last two lines also detach from the event and delete the
EventManager . The other main change is that EvaluateInput is no longer required to return the chosen
option. We now catch the event in the HandleEvent method, which you can see in Listing 21-23.
Listing 21-23. The Game::HandleEvent Method
void Game::HandleEvent(const Event* pEvent)
{
if (pEvent->GetID() == QuitEvent)
{
m_playerQuit = true;
}
}
Handling events is really easy. You just need to check the ID of the Event and carry out the required
action, which in this case is setting the m_playerQuit variable to true . If we had attached to more
events we could have used else if statements to check against more EventIDs .