| // dear imgui: standalone example application for FreeGLUT + OpenGL2, using legacy fixed pipeline |
| // If you are new to dear imgui, see examples/README.txt and documentation at the top of imgui.cpp. |
| // (Using GLUT or FreeGLUT is not recommended unless you really miss the 90's) |
| |
| #include "imgui.h" |
| #include "../imgui_impl_freeglut.h" |
| #include "../imgui_impl_opengl2.h" |
| #include <GL/freeglut.h> |
| |
| #ifdef _MSC_VER |
| #pragma warning (disable: 4505) // unreferenced local function has been removed |
| #endif |
| |
| static bool show_demo_window = true; |
| static bool show_another_window = false; |
| static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); |
| |
| void my_display_code() |
| { |
| // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!). |
| if (show_demo_window) |
| ImGui::ShowDemoWindow(&show_demo_window); |
| |
| // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window. |
| { |
| static float f = 0.0f; |
| static int counter = 0; |
| |
| ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it. |
| |
| ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too) |
| ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state |
| ImGui::Checkbox("Another Window", &show_another_window); |
| |
| ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f |
| ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color |
| |
| if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated) |
| counter++; |
| ImGui::SameLine(); |
| ImGui::Text("counter = %d", counter); |
| |
| ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); |
| ImGui::End(); |
| } |
| |
| // 3. Show another simple window. |
| if (show_another_window) |
| { |
| ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked) |
| ImGui::Text("Hello from another window!"); |
| if (ImGui::Button("Close Me")) |
| show_another_window = false; |
| ImGui::End(); |
| } |
| } |
| |
| void glut_display_func() |
| { |
| // Start the Dear ImGui frame |
| ImGui_ImplOpenGL2_NewFrame(); |
| ImGui_ImplFreeGLUT_NewFrame(); |
| |
| my_display_code(); |
| |
| // Rendering |
| ImGui::Render(); |
| ImGuiIO& io = ImGui::GetIO(); |
| glViewport(0, 0, (GLsizei)io.DisplaySize.x, (GLsizei)io.DisplaySize.y); |
| glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w); |
| glClear(GL_COLOR_BUFFER_BIT); |
| //glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound, but prefer using the GL3+ code. |
| ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData()); |
| |
| glutSwapBuffers(); |
| glutPostRedisplay(); |
| } |
| |
| // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. |
| // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application. |
| // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application. |
| // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags. |
| |
| int main(int argc, char** argv) |
| { |
| // Create GLUT window |
| glutInit(&argc, argv); |
| glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS); |
| glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_MULTISAMPLE); |
| glutInitWindowSize(1280, 720); |
| glutCreateWindow("Dear ImGui FreeGLUT+OpenGL2 Example"); |
| |
| // Setup GLUT display function |
| // We will also call ImGui_ImplFreeGLUT_InstallFuncs() to get all the other functions installed for us, |
| // otherwise it is possible to install our own functions and call the imgui_impl_freeglut.h functions ourselves. |
| glutDisplayFunc(glut_display_func); |
| |
| // Setup Dear ImGui context |
| ImGui::CreateContext(); |
| ImGuiIO& io = ImGui::GetIO(); (void)io; |
| //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls |
| |
| // Setup Platform/Renderer bindings |
| ImGui_ImplFreeGLUT_Init(); |
| ImGui_ImplFreeGLUT_InstallFuncs(); |
| ImGui_ImplOpenGL2_Init(); |
| |
| // Setup Style |
| ImGui::StyleColorsDark(); |
| //ImGui::StyleColorsClassic(); |
| |
| // Load Fonts |
| // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. |
| // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple. |
| // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit). |
| // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call. |
| // - Read 'misc/fonts/README.txt' for more instructions and details. |
| // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ ! |
| //io.Fonts->AddFontDefault(); |
| //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f); |
| //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f); |
| //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f); |
| //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f); |
| //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese()); |
| //IM_ASSERT(font != NULL); |
| |
| glutMainLoop(); |
| |
| // Cleanup |
| ImGui_ImplOpenGL2_Shutdown(); |
| ImGui_ImplFreeGLUT_Shutdown(); |
| ImGui::DestroyContext(); |
| |
| return 0; |
| } |