--- /dev/null
+#include <gtk/gtk.h>
+#include <GL/glut.h>
+#include "gtkgl.h"
+
+static gdouble rotate = 0;
+
+gboolean on_spin(GtkWidget *spin)
+{
+ /* Spin the cube when the toggle button is pressed */
+ if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(spin)))
+ rotate++;
+ gtk_widget_queue_draw(gtk_widget_get_toplevel(spin));
+ return TRUE;
+}
+
+gboolean on_draw(GtkWidget *draw)
+{
+ GtkAllocation alloc;
+ gtk_widget_get_allocation(draw, &alloc);
+
+ /* Start OpenGL Commands */
+ gtk_gl_begin(draw);
+
+ /* Setup View */
+ glViewport(0, 0, alloc.width, alloc.height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective(45, (gdouble)alloc.width/alloc.height, 0.01, 10);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslated(0, 0, -3);
+ glRotated(rotate+20, 1, 0, 0);
+ glRotated(rotate+30, 0, 1, 0);
+
+ /* Draw a Cube */
+ glClearColor(0, 0, 0.15, 0);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glLineWidth(4);
+
+ glColor3f(1, 0, 0);
+ glutSolidCube(1);
+
+ glColor3f(1, 1, 1);
+ glutWireCube(1);
+
+ /* Done with OpenGL */
+ gtk_gl_end(draw);
+
+ return TRUE;
+}
+
+int main(int argc, char **argv)
+{
+ /* Library initialization */
+ gtk_init(&argc, &argv);
+ glutInit(&argc, argv);
+
+ /* Create widgets */
+ GtkWidget *win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+ GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
+ GtkWidget *draw = gtk_drawing_area_new();
+ GtkWidget *spin = gtk_toggle_button_new_with_label("Spin");
+
+ /* Pack everything together */
+ gtk_container_add(GTK_CONTAINER(win), box);
+ gtk_box_pack_start(GTK_BOX(box), draw, TRUE, TRUE, 0);
+ gtk_box_pack_start(GTK_BOX(box), spin, FALSE, FALSE, 0);
+
+ /* Connect signals */
+ g_signal_connect(win, "destroy", gtk_main_quit, NULL);
+ g_signal_connect(draw, "draw", G_CALLBACK(on_draw), NULL);
+ g_timeout_add(1000/60, (GSourceFunc)on_spin, spin);
+
+ /* Enable OpenGL on drawing frame */
+ gtk_gl_enable(draw);
+
+ /* Show and run main loop */
+ gtk_widget_show_all(win);
+ gtk_main();
+
+ return 0;
+}