jump on on on on on on on peek peek progress seek step tween tween tween_value_t

on() [6/7] template<typename FirstValueType, typename... RemainingValueTypes> template<typename Callback> auto on ( detail::event::step_t , Callback && cb ) -> void Registers a callback for step() events. The callback is invoked after each step() call. It receives a reference to the tween and must return event::response::ok to continue receiving events, or event::response::unsubscribe to auto-remove. Parameters cb Callback with signature: event::response(tween&) auto t = tweeny::from(0).to(100).during(100U).build(); t.on(event::step, [](auto& tween) { printf("Stepped to: %d\n", tween.peek()); return event::response::ok; }); t.step(10); // Prints: "Stepped to: 10"