complete jump keyframeEnter keyframeLeave response seek step update

complete detail::event::complete_t complete {} inlineconstexpr Event triggered when the animation is at completion. Fires whenever progress() is >= 1.0 (100%) after a step(), seek(), or jump() call. This means the callback will fire every time the tween is navigated to a completed state, not just the first time. Common use cases: Cleaning up resources after animation Chaining animations sequentially Triggering completion callbacks Transitioning to next state Playing sound effects or particle effects at end Note The callback fires every time the tween is at completion (progress >= 1.0). If you step to completion, then back, then forward to completion again, it will fire both times. Use response::unsubscribe if you want one-shot behavior. auto tween = tweeny::from(0).to(100).during(60U).build(); tween.on(tweeny::event::complete, [](auto& t) { printf("Animation at completion: %d\n", t.peek()); return tweeny::event::response::unsubscribe; // One-shot callback }); tween.step(60); // Fires complete callback tween.step(-10); // Now progress < 1.0 tween.step(10); // Would fire again, but we unsubscribed See also step For frame-by-frame events during animation response::unsubscribe For one-shot completion handlers