forward method

Cmd forward({ double? from, Curve curve = Curves.linear, })

Starts animating forward (toward upperBound).

Returns a Cmd that schedules the first animation frame tick. The hosting State must return this Cmd from handleInit or handleUpdate.

If from is provided the controller jumps to that value before animating. The optional curve defaults to Curves.linear.

When duration is null or Duration.zero, the animation completes synchronously and processTick is not required.

Implementation

Cmd forward({double? from, Curve curve = Curves.linear}) {
  if (from != null) _value = from.clamp(lowerBound, upperBound);
  _targetValue = upperBound;
  _startValue = _value;
  _curve = curve;
  _status = AnimationStatus.forward;
  _startTime = null;
  _repeating = false;
  _notifyStatusListeners();
  if (duration == null || duration == Duration.zero) {
    _value = _targetValue;
    _completeAnimation();
    return Cmd.none();
  }
  return _scheduleTick();
}