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

on() [4/7] template<typename FirstValueType, typename... RemainingValueTypes> template<typename Callback> auto on ( detail::event::keyframeLeave_t , Callback && cb ) -> void Registers a callback for leaving a keyframe. The callback is invoked when the tween transitions out of a keyframe section. Receives the tween reference and event data containing the keyframe index. Parameters cb Callback with signature: event::response(tween&, event::keyframeLeave) auto t = tweeny::from(0).to(50).during(30U).to(100).during(30U).build(); t.on(event::keyframeLeave, [](auto& tween, auto evt) { printf("Left keyframe %zu\n", evt.key_frame); return event::response::ok; }); t.step(31); // Triggers: "Left keyframe 0"