complete jump keyframeEnter keyframeLeave response seek step update

step detail::event::step_t step {} inlineconstexpr Event triggered after each step() call. Use this event to react to frame-by-frame progression of an animation. The callback receives a reference to the tween and can query its current state using peek() or progress(). Common use cases: Updating visual properties every frame Logging animation progress Synchronizing with other animations Implementing custom timing logic auto tween = tweeny::from(0).to(100).during(60U).build(); tween.on(tweeny::event::step, [](auto& t) { printf("Current value: %d\n", t.peek()); return tweeny::event::response::ok; }); tween.step(1); // Triggers the callback See also seek For events when jumping to specific frames complete For events when animation finishes