Managing multiple RenderWindow's in sfml

Question

I seem to be having a bit of trouble when managing multiple windows in SFML C++. When I try to manage multiple windows, they both open correctly and I can interact in the larger one, however, the smaller one, which upon creation is overlapping the larger window, I can not interact with until I move the large window away. An image is below to help with the visual. Also below is the main loop for my code.

The main loop of the code is as follows:

while (MainWin.isOpen() || F1Menu.isOpen())
{
    sf::Event Event;
    if (MainWin.pollEvent(Event))
    {
        switch (Event.type)
        {
            case sf::Event::Closed:
                MainWin.close();
                if (F1Menu.isOpen())
                    F1Menu.close();
            break;

            case sf::Event::Resized:
                MainView.reset(sf::FloatRect(0.f, 0.f, (MainWin.getSize().x*0.9f), (MainWin.getSize().y*0.9)));
                MainWin.setView(MainView);
            break;

            case sf::Event::KeyPressed:
                if (Event.key.code == sf::Keyboard::F1)
                    F1Menu.create(sf::VideoMode(200, 500), "SFML 2D - F1 Menu");
                else if (Event.key.code == sf::Keyboard::Escape)
                {
                    MainWin.close();
                    if (F1Menu.isOpen())
                        F1Menu.close();
                }
            break;
        }
    }

    if (F1Menu.pollEvent(Event))
    {
        switch (Event.type)
        {
            case sf::Event::Closed:
                F1Menu.close();
            break;

            case sf::Event::MouseButtonReleased:
                if (Event.mouseButton.button == sf::Mouse::Left)
                    if (LMButton.mouseIn(F1Menu))
                        LoadMap("MapA.dat");
            break;

            case sf::Event::MouseMoved:
                if (LMButton.mouseIn(F1Menu))
                    LMButton.setColor(sf::Color::Yellow);
                else
                    LMButton.setColor(sf::Color::White);
            break;
        }
    }

    moveClock.restart();
    if (sf::Keyboard::isKeyPressed(sf::Keyboard::W))
    {
        player.move(0, -4 * time);
        player.setDirection(sfm::Direction::Up);
    }

    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::S))
    {
        player.move(0, 4 * time);
        player.setDirection(sfm::Direction::Down);
    }

    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::A))
    {
        player.move(-4 * time, 0);
        player.setDirection(sfm::Direction::Left);
    }

    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::D))
    {
        player.move(4 * time, 0);
        player.setDirection(sfm::Direction::Right);
    }

    if (F1Menu.isOpen())
    {
        F1Menu.clear();
        F1Menu.draw(LMButton);
        F1Menu.display();
    }

    if (MainWin.isOpen())
    {
        MainWin.clear();
        if (SplashScreen.didAnimate)
            SplashScreen.Animate(MainWin, sfg::Animation::FadeIn);
        if (inMenu)
        {

        }
        if (isPlaying)
        {
            DrawMap(MainWin);
            MainWin.draw(player);
        }
        MainWin.display();
    }
}

Answer 1

In my knowledge, you aren't able to poll two separate windows with one sf::Event object. this is because when polling events, you are essentially popping off of the event stack and handling each one. The signature of pollEvent is

bool pollEvent(sf::Event &event);

note that there is no const qualifier here, because each processed event gets popped off the event stack. By the time you finish polling your main window there are no events left for your other window. This could be the cause of your window being unable to focus. Your second window should use it's own separate sf::Event

On a side note I would highly recommend encapsulating your data inside classes. You can find a great reference here on how to go about doing so. It's great coding practice and helps minimize confusion when bug hunting