copyOldSegmentValues method

@override void copyOldSegmentValues(double seriesAnimationFactor, double segmentAnimationFactor)

Implementation

@override
void copyOldSegmentValues(
  double seriesAnimationFactor,
  double segmentAnimationFactor,
) {
  if (series.animationType == AnimationType.loading) {
    points.clear();
    _drawIndexes.clear();
    _oldHighPoints.clear();
    _oldLowPoints.clear();
    return;
  }

  if (series.animationDuration > 0) {
    if (points.isEmpty) {
      _oldHighPoints.clear();
      _oldLowPoints.clear();
      return;
    }

    final int oldPointsLength = _oldHighPoints.length;
    final int newPointsLength = _highPoints.length;
    if (oldPointsLength == newPointsLength) {
      for (int i = 0; i < oldPointsLength; i++) {
        _oldHighPoints[i] =
            _oldHighPoints[i].lerp(
              _highPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
        _oldLowPoints[i] =
            _oldLowPoints[i].lerp(
              _lowPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
      }
    } else if (oldPointsLength < newPointsLength) {
      for (int i = 0; i < oldPointsLength; i++) {
        _oldHighPoints[i] =
            _oldHighPoints[i].lerp(
              _highPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
        _oldLowPoints[i] =
            _oldLowPoints[i].lerp(
              _lowPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
      }
      _oldHighPoints.addAll(_highPoints.sublist(oldPointsLength));
      _oldLowPoints.addAll(_lowPoints.sublist(oldPointsLength));
    } else {
      for (int i = 0; i < newPointsLength; i++) {
        _oldHighPoints[i] =
            _oldHighPoints[i].lerp(
              _highPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
        _oldLowPoints[i] =
            _oldLowPoints[i].lerp(
              _lowPoints[i],
              segmentAnimationFactor,
              _bottom,
            )!;
      }
      _oldHighPoints.removeRange(newPointsLength, oldPointsLength);
      _oldLowPoints.removeRange(newPointsLength, oldPointsLength);
    }
  } else {
    _oldHighPoints.clear();
    _oldLowPoints.clear();
  }
}