sf::View StateStack::updateView()
{
    //calculate the correct view size / ratio for window size
    m_context.defaultView.setSize(1920.f, 1080.f);
    m_context.defaultView.setCenter(960.f, 540.f);

    auto vModeWidth = static_cast<float>(m_context.appInstance.getVideoSettings().VideoMode.width);
    auto vModeHeight = static_cast<float>(m_context.appInstance.getVideoSettings().VideoMode.height);

    auto winSize = sf::Vector2f(vModeWidth, vModeHeight);
    float windowRatio = winSize.x / winSize.y;
    float viewRatio = 16.f / 9.f;

    float sizeY = windowRatio / viewRatio;
    float top = (1.f - sizeY) / 2.f;

    m_context.defaultView.setViewport({ { 0.f, top }, { 1.f, sizeY } });

    for (auto& state : m_stack)
        state->setContext(m_context);

    return m_context.defaultView;
}