gistfile1.cpp

bool exiter::is_handling(const sf::Event::EventType& ev_type) const {
  if (ev_type == sf::Event::Closed)
    return true;
  if (ev_type == sf::Event::KeyPressed)
    return true;
  else
    return controller::is_handling(ev_type);
}

bool exiter::handle(const sf::Event& event, runner& runner) {
  if (event.type == sf::Event::Closed ||
      event.key.code == sf::Keyboard::Key::Escape) {
    runner.get_renderer()->get_window()->close();
    return false;  // stop propagating
  } else
    return true;  // continue propagating
}

gistfile2.cpp

bool actor_spawner::is_handling(const sf::Event::EventType& ev_type) const {
  if (ev_type == sf::Event::MouseButtonPressed)
    return true;
  else
    return controller::is_handling(ev_type);
}

bool actor_spawner::handle(const sf::Event& event, runner& runner) {
  if (event.mouseButton.button == sf::Mouse::Button::Left) {
    runner.get_entity_manager()->add(new testcircle);
    return false;  // stop propagating
  } else
    return controller::handle(event, runner);  // continue propagating
}

gistfile3.cpp

bool coordinate_debugger::is_handling(
    const sf::Event::EventType& ev_type) const {
  if (ev_type == sf::Event::MouseButtonPressed)
    return true;
  if (ev_type == sf::Event::MouseButtonReleased)
    return true;
  if (_point && ev_type == sf::Event::MouseMoved)
    return true;
  else
    return controller::is_handling(ev_type);
}

bool coordinate_debugger::handle(const sf::Event& event, runner& runner) {
  if (event.type == sf::Event::MouseButtonPressed) {
    _point = std::make_shared<entities::debug_point>(sf::Vector2f {
      static_cast<float>(event.mouseButton.x),
          static_cast<float>(event.mouseButton.y)
    });
    runner.get_entity_manager()->add(_point);
    return false;
  } else if (event.type == sf::Event::MouseButtonReleased) {
    runner.get_entity_manager()->remove(_point);
    _point.reset();
    return false;
  } else if (event.type == sf::Event::MouseMoved) {
    _point->shape.setPosition(sf::Vector2f {
      static_cast<float>(event.mouseMove.x),
          static_cast<float>(event.mouseMove.y)
    });
  }
  return controller::handle(event, runner);  // continue propagating
}