#include "imgui.h" #include "imgui_impl_glfw.h" #include "imgui_impl_opengl3.h" #include #include static void glfw_error_callback(int error, const char* description) { fprintf(stderr, "GLFW Error %d: %s\n", error, description); } int main(int, char**) { // Setup window glfwSetErrorCallback(glfw_error_callback); if (!glfwInit()) return 1; // Decide GL+GLSL versions const char* glsl_version = "#version 130"; glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); // Create window with graphics context GLFWwindow* window = glfwCreateWindow(800, 600, "ImGui Simple Menu", NULL, NULL); if (window == NULL) return 1; glfwMakeContextCurrent(window); glfwSwapInterval(1); // Enable vsync // Setup Dear ImGui context IMGUI_CHECKVERSION(); ImGui::CreateContext(); ImGuiIO& io = ImGui::GetIO(); (void)io; // Setup Dear ImGui style ImGui::StyleColorsDark(); // Setup Platform/Renderer backends ImGui_ImplGlfw_InitForOpenGL(window, true); ImGui_ImplOpenGL3_Init(glsl_version); // Main loop while (!glfwWindowShouldClose(window)) { // Poll and handle events glfwPollEvents(); // Start the Dear ImGui frame ImGui_ImplOpenGL3_NewFrame(); ImGui_ImplGlfw_NewFrame(); ImGui::NewFrame(); // Simple menu bar if (ImGui::BeginMainMenuBar()) { if (ImGui::BeginMenu("File")) { if (ImGui::MenuItem("Open", "Ctrl+O")) {} if (ImGui::MenuItem("Save", "Ctrl+S")) {} if (ImGui::MenuItem("Exit", "Alt+F4")) glfwSetWindowShouldClose(window, GLFW_TRUE); ImGui::EndMenu(); } if (ImGui::BeginMenu("Edit")) { if (ImGui::MenuItem("Undo", "Ctrl+Z")) {} if (ImGui::MenuItem("Redo", "Ctrl+Y")) {} ImGui::EndMenu(); } ImGui::EndMainMenuBar(); } // Example window ImGui::Begin("Hello, ImGui!"); ImGui::Text("This is a simple ImGui menu example."); ImGui::End(); // Rendering ImGui::Render(); int display_w, display_h; glfwGetFramebufferSize(window, &display_w, &display_h); glViewport(0, 0, display_w, display_h); glClearColor(0.1f, 0.1f, 0.1f, 1.0f); glClear(GL_COLOR_BUFFER_BIT); ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData()); glfwSwapBuffers(window); } // Cleanup ImGui_ImplOpenGL3_Shutdown(); ImGui_ImplGlfw_Shutdown(); ImGui::DestroyContext(); glfwDestroyWindow(window); glfwTerminate(); return 0; } cmake_minimum_required(VERSION 3.10) project(ImGuiSimpleMenu) set(CMAKE_CXX_STANDARD 17) find_package(OpenGL REQUIRED) find_package(glfw3 3.3 REQUIRED) add_executable(ImGuiSimpleMenu main.cpp) # ImGui source files (assume you have imgui/ in your project directory) # You need to download ImGui and place the 'imgui' folder in your project root. # The 'imgui' folder should contain imgui.cpp, imgui_draw.cpp, etc. # and a 'backends' subfolder with imgui_impl_glfw.cpp and imgui_impl_opengl3.cpp target_sources(ImGuiSimpleMenu PRIVATE imgui/imgui.cpp imgui/imgui_draw.cpp imgui/imgui_tables.cpp imgui/imgui_widgets.cpp imgui/imgui_demo.cpp # Optional, but useful for examples imgui/backends/imgui_impl_glfw.cpp imgui/backends/imgui_impl_opengl3.cpp ) target_include_directories(ImGuiSimpleMenu PRIVATE imgui imgui/backends ) target_link_libraries(ImGuiSimpleMenu PRIVATE OpenGL::GL glfw)