getViewOffset method

double getViewOffset(
  1. AntdEdge viewportAlignLine
)

Implementation

double getViewOffset(AntdEdge viewportAlignLine) {
  var fSetViewOffset = -viewportOffset;
  if (viewportAlignLine == AntdEdge.start) {
    return fSetViewOffset;
  }

  var viewportDimension = position.viewportDimension;
  if (viewportAlignLine == AntdEdge.center) {
    return -viewportDimension / 2 + fSetViewOffset;
  }
  if (viewportAlignLine == AntdEdge.end) {
    return -viewportDimension + fSetViewOffset;
  }
  return fSetViewOffset;
}