Cpp-OpenGL-GUI

Graphical user interface written in C++ using FreeGLUT.

Quick overview of the features:

Getting started

MainWindow

The main window wraps glutCreateWindow, handles the keyboard/mouse input events, and limits the fps of the gui.

To create the main window with the title "MainWindow" at (100, 100) point on screen with a width of 960 pixels and a height of 540 pixels:

GLUI::MainWindow* main_window = new GLUI::MainWindow("MainWindow", 100, 100, 960, 540);

For proper operation, you must forward the events of glut to the main window:

glutKeyboardFunc(on_keyboard_down);
glutKeyboardUpFunc(on_keyboard_up);
glutSpecialFunc(on_special_down);
glutSpecialUpFunc(on_special_up);
glutMouseFunc(on_mouse);
glutMotionFunc(on_mouse_motion);
glutPassiveMotionFunc(on_mouse_motion_passive);

void on_keyboard_down(unsigned char key, int x, int y) {
	main_window->on_keyboard_down(key, x, y);
}
void on_keyboard_up(unsigned char key, int x, int y) {
	main_window->on_keyboard_up(key, x, y);
}
void on_special_down(int key, int x, int y) {
	main_window->on_special_down(key, x, y);
}
void on_special_up(int key, int x, int y) {
	main_window->on_special_up(key, x, y);
}
void on_mouse(int button, int state, int x, int y) {
	main_window->on_mouse(button, state, x, y);
}
void on_mouse_motion(int x, int y) {
	main_window->on_mouse_motion(x, y);
}
void on_mouse_motion_passive(int x, int y) {
	main_window->on_mouse_motion_passive(x, y);
}

To render the gui components:

glutDisplayFunc(on_display);

void on_display() {
	glClearColor(0.1f, 0.2f, 0.3f, 1.0f);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	main_window->render();
	glutSwapBuffers();
}

It does not matter how many times you call the render method, it will draw itself only as many times what it's configured fps defines.

Window

Windows are almost behave like windows in Windows (the OS), you can move/resize/collapse them.

To create a window at (10, 10) in the parent component, with a width of 800 pixels and a height of 500 pixels:

GLUI::Window* window = new GLUI::Window("Window 0", 10, 10, 800, 500);
main_window->add_component(window);