GTK Signals (Cont.)

In the example above, our callback will cause the GTK application to send itself a 'destroy' event. Here is how we handle this event:

 /* Here we connect the "destroy" event to a signal handler.
  * This event occurs when we call gtk_widget_destroy() on
  * the window, or if we return FALSE in the "delete_event"
  * callback.
  */
 gtk_signal_connect(GTK_OBJECT (main_window), "destroy",
                    GTK_SIGNAL_FUNC (exit_cb), NULL);

And the callback itself is defined like this:

 /* exit the application. */
 void
 exit_cb(GtkWidget *widget, gpointer data)
 {
     gtk_main_quit();
 }