main.cpp

#include "imgui.h" // necessary for ImGui::*, imgui-SFML.h doesn't include imgui.h

#include "imgui-SFML.h" // for ImGui::SFML::* functions and SFML-specific overloads

#include <SFML/Graphics/CircleShape.hpp>
#include <SFML/Graphics/RenderWindow.hpp>
#include <SFML/System/Clock.hpp>
#include <SFML/Window/Event.hpp>

#include <iostream>

int main() {
    sf::RenderWindow window(sf::VideoMode(1280, 720), "ImGui + SFML = <3");
    window.setFramerateLimit(60);
    ImGui::SFML::Init(window);
    // Comment/uncomment this to disable/enable viewports
    // Must be using docking branch of ImGui
    //ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_ViewportsEnable 
    //                           |  ImGuiConfigFlags_DockingEnable;

    sf::CircleShape shape(100.f);
    shape.setFillColor(sf::Color::Green);

    sf::Clock deltaClock;
    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            ImGui::SFML::ProcessEvent(window, event);

            if (event.type == sf::Event::Closed) {
                window.close();
            }
        }

        ImGui::SFML::Update(window, deltaClock.restart());

        ImGui::ShowDemoWindow();

        ImGui::Begin("Hello, world!");
        ImGui::Button("Look at this pretty button");
        ImGui::End();

        window.clear();
        window.draw(shape);
        ImGui::SFML::Render(window);
        // Comment/uncomment this to disable/enable viewports
        // Must be using docking branch of ImGui
        //if (ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable) {
        //    ImGui::UpdatePlatformWindows();
        //    ImGui::RenderPlatformWindowsDefault();
        //}
        window.display();
    }

    ImGui::SFML::Shutdown();

    return 0;
}