g_signal_connect(G_OBJECT(widget), "expose_event",
G_CALLBACK
(colorlabel_drawing_area_expose_event_cb),
GINT_TO_POINTER
((gint)CR(color.red, color.green, color.blue)));
g_signal_connect(G_OBJECT(widget), "expose_event",
G_CALLBACK
(colorlabel_drawing_area_expose_event_cb),
GINT_TO_POINTER
((gint)CR(color.red, color.green, color.blue)));