void set_color_from_rgb (Gdk::Color&, uint32_t);
void set_color_from_rgba (Gdk::Color&, uint32_t);
-uint32_t contrasting_text_color (uint32_t c);
-
bool relay_key_press (GdkEventKey* ev, Gtk::Window* win);
bool key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev);
bool emulate_key_event (unsigned int);