Be the former.
def register_pointer_focus(candidate, event): # 1. Pre-condition: candidate is alive and hittable assert candidate.is_alive() assert candidate.hit_test(event.x, event.y) == True # 2. Invalidate current focus without releasing events yet old_focus = system.pointer_focus system.pointer_focus = None pointer focus registration code
The best systems make pointer focus invisible. The worst make it unforgettable. Be the former
Your users’ pointers—and your sanity—will thank you. Have your own focus war story? The comments are open. Bring logs. Be the former. def register_pointer_focus(candidate