SFML + SFGUI

#include <iostream>
#include <functional>
#include <SFML/Graphics.hpp>
#include <SFGUI/SFGUI.hpp>

void on_button_click()
{
  std::cout << "Test" << std::endl;
}

int main()
{
  sf::RenderWindow rwindow(sf::VideoMode(640, 480), "SFML + SFGUI test");
  sf::CircleShape shape(100.0f);
  shape.setFillColor(sf::Color::Green);

  sfg::SFGUI sfgui;
  sfg::Desktop desktop;

  auto window = sfg::Window::Create();
  window->SetTitle("Test window");

  auto button = sfg::Button::Create("Hello");
  button->GetSignal(sfg::Button::OnLeftClick).Connect(std::bind(&on_button_click));

  window->Add(button);
  desktop.Add(window);

  bool quit = false;
  while (!quit) {
    sf::Event event;
    while (rwindow.pollEvent(event)) {
      if (event.type == sf::Event::Closed) {
  rwindow.close();
  quit = true;
      }

      desktop.HandleEvent(event);
    }

    desktop.Update(1.0f);

    rwindow.clear();
    rwindow.draw(shape);
    sfgui.Display(rwindow);
    rwindow.display();
  }

  return 0;
}