Integrating our code

In order to prevent sounds or music from playing at inappropriate times, our state manager must notify the sound manager of any state changes:

void StateManager::SwitchTo(const StateType& l_type){
  ...
  m_shared->m_soundManager->ChangeState(l_type);
  ...
}

Since the sound manager also cares about states being removed, let's tell it when that happens:

void StateManager::RemoveState(const StateType& l_type){
  for (auto itr = m_states.begin();
    itr != m_states.end(); ++itr)
  {
    if (itr->first == l_type){
      ...
      m_shared->m_soundManager->RemoveState(l_type);
      return;
    }
  }
}

The only thing we have left to do now is actually integrating everything we worked on into the rest of our code base, starting with SharedContext.h:

...
#include "AudioManager.h"
#include "SoundManager.h"
...
struct SharedContext{
    SharedContext():
        ...
        m_audioManager(nullptr),
        m_soundManager(nullptr),...