update method

void update(double dt)

Implementation

void update(double dt) {
  if (!_running) return;
  _elapsed = (_elapsed + dt).clamp(0.0, duration);
  value = _elapsed / duration;
  onFrame?.call(value, _elapsed);
  if (value >= 1.0) {
    _running = false;
    onFrame?.call(1.0, _elapsed);
    onComplete?.call();
  }
}