transformValues method

@override void transformValues()

Transforms the x and y values to screen coordinates.

Implementation

@override
void transformValues() {
  if (x.isNaN || top.isNaN || bottom.isNaN) {
    segmentRect = null;
    _oldSegmentRect = null;
    points.clear();
    return;
  }

  points.clear();
  final PointToPixelCallback transformX = series.pointToPixelX;
  final PointToPixelCallback transformY = series.pointToPixelY;
  final num left = x + series.sbsInfo.minimum;
  final num sbsMaximum = series.sbsInfo.maximum;
  final num right = x + sbsMaximum;

  final double centerY = (bottom + top) / 2;
  final double x1 = transformX(left, top);
  final double y1 = transformY(left, top);
  final double x2 = transformX(right, bottom);
  final double y2 = transformY(right, bottom);

  final BorderRadius borderRadius = series._borderRadius;
  segmentRect = toRRect(x1, y1, x2, y2, borderRadius);
  _oldSegmentRect ??= toRRect(
    transformX(left, centerY),
    transformY(left, centerY),
    transformX(right, centerY),
    transformY(right, centerY),
    borderRadius,
  );

  if (currentSegmentIndex > 0) {
    final WaterfallSegment<T, D> oldSegment =
        series.segments[currentSegmentIndex - 1] as WaterfallSegment<T, D>;
    final num oldSegmentRight = oldSegment.x + sbsMaximum;
    final num oldSegmentTop = oldSegment.top;
    points.add(Offset(
      transformX(oldSegmentRight, oldSegmentTop),
      transformY(oldSegmentRight, oldSegmentTop),
    ));

    if (isTotalSum || isIntermediateSum) {
      points.add(Offset(x1, y1));
    } else {
      series.isTransposed
          ? points.add(Offset(x2, y1))
          : points.add(Offset(x1, y2));
    }
  }
}