g_signal_connect (ia, "prepare", G_CALLBACK (on_prepare), ia);
g_signal_connect (ia, "cancel", G_CALLBACK (on_cancel), ia);
g_signal_connect (ia, "close", G_CALLBACK (on_close), ia);
g_signal_connect (ia, "prepare", G_CALLBACK (on_prepare), ia);
g_signal_connect (ia, "cancel", G_CALLBACK (on_cancel), ia);
g_signal_connect (ia, "close", G_CALLBACK (on_close), ia);