transformValues method

@override void transformValues()

Transforms the x and y values to screen coordinates.

Implementation

@override
void transformValues() {
  points.clear();
  _drawIndexes.clear();
  _highPoints.clear();
  _lowPoints.clear();
  _startControlHighPoints.clear();
  _endControlHighPoints.clear();

  _fillPath.reset();
  _strokePath.reset();
  if (_xValues.isEmpty || _yValues.isEmpty) {
    return;
  }

  _calculatePoints(_xValues, _yValues);
  final List<Offset> lerpHighPoints =
      _lerpPoints(_oldHighPoints, _highPoints);
  final List<Offset> lerpLowPoints = _lerpPoints(_oldLowPoints, _lowPoints);
  final List<Offset> lerpStartControlHighPoints =
      _lerpPoints(_oldStartControlHighPoints, _startControlHighPoints);
  final List<Offset> lerpEndControlHighPoints =
      _lerpPoints(_oldEndControlHighPoints, _endControlHighPoints);
  _createFillPath(_fillPath, lerpHighPoints, lerpLowPoints,
      lerpStartControlHighPoints, lerpEndControlHighPoints);

  switch (series.borderDrawMode) {
    case BorderDrawMode.all:
      _strokePath = _fillPath;
      break;
    case BorderDrawMode.top:
      _createTopStrokePath(
        _strokePath,
        lerpHighPoints,
        lerpStartControlHighPoints,
        lerpEndControlHighPoints,
      );
      break;
    case BorderDrawMode.excludeBottom:
      _createExcludeBottomStrokePath(
        _strokePath,
        lerpHighPoints,
        lerpLowPoints,
        lerpStartControlHighPoints,
        lerpEndControlHighPoints,
      );
      break;
  }
}