And now, this works:
---8<---
import GI.repository;
void main(int argc, array(string) argv)
{
Clutter.init(argc, argv);
object stage = Clutter.Stage.get_default();
stage->set_size(512, 512);
object text = Clutter.Text.new_with_text("sans 24", "Hello");
stage->add_actor(text);
text->show();
object timeline = Clutter.Timeline.new(3000);
object alpha =
Clutter.Alpha.new_full(timeline, Clutter.AnimationMode.linear);
object behaviour =
Clutter.BehaviourEllipse.new(alpha, 256, 256, 200, 200,
Clutter.RotateDirection.cw, 0, 360);
behaviour->apply(text);
timeline->set_loop(1);
timeline->start();
stage->show();
Clutter.main();
}
---8<---
What fun!