g_signal_handler_block(textview, win->pager_expose_handler);
win->pager_keypress_handler = g_signal_connect( textview, "key-press-event", G_CALLBACK(pager_on_key_press_event), win );
g_signal_handler_block(textview, win->pager_keypress_handler);
g_signal_handler_block(textview, win->pager_expose_handler);
win->pager_keypress_handler = g_signal_connect( textview, "key-press-event", G_CALLBACK(pager_on_key_press_event), win );
g_signal_handler_block(textview, win->pager_keypress_handler);