onPaint method Null safety

  1. @override
void onPaint(
  1. Canvas canvas
)
override

Draws segment in series bounds.

Implementation

@override
void onPaint(Canvas canvas) {
  final WaterfallSeries<dynamic, dynamic> _series =
      this._series as WaterfallSeries<dynamic, dynamic>;
  CartesianChartPoint<dynamic> oldPaint;
  final Path linePath = Path();

  if (fillPaint != null) {
    (_series.animationDuration > 0 &&
            !_seriesRenderer._renderingDetails!.isLegendToggled)
        ? _animateRangeColumn(
            canvas,
            _seriesRenderer,
            fillPaint!,
            segmentRect,
            _oldPoint != null ? _oldPoint!.region : _oldRegion,
            animationFactor)
        : canvas.drawRRect(segmentRect, fillPaint!);
  }
  if (strokePaint != null) {
    (_series.dashArray[0] != 0 && _series.dashArray[1] != 0)
        ? _drawDashedLine(canvas, _series.dashArray, strokePaint!, _path)
        : (_series.animationDuration > 0 &&
                !_seriesRenderer._renderingDetails!.isLegendToggled)
            ? _animateRangeColumn(
                canvas,
                _seriesRenderer,
                strokePaint!,
                segmentRect,
                _oldPoint != null ? _oldPoint!.region : _oldRegion,
                animationFactor)
            : canvas.drawRRect(segmentRect, strokePaint!);
  }
  if (connectorLineStrokePaint != null &&
      _currentPoint!.overallDataPointIndex! > 0) {
    oldPaint = _seriesRenderer
        ._dataPoints[_currentPoint!.overallDataPointIndex! - 1];
    _x1 = oldPaint.endValueRightPoint!.x;
    _y1 = oldPaint.endValueRightPoint!.y;
    if (_currentPoint!.isTotalSum! || _currentPoint!.isIntermediateSum!) {
      _x2 = _currentPoint!.endValueLeftPoint!.x;
      _y2 = _currentPoint!.endValueLeftPoint!.y;
    } else {
      _x2 = _currentPoint!.originValueLeftPoint!.x;
      _y2 = _currentPoint!.originValueLeftPoint!.y;
    }
    if (_series.animationDuration <= 0 ||
        animationFactor >=
            _seriesRenderer._chartState!._seriesDurationFactor) {
      if (_series.connectorLineSettings.dashArray![0] != 0 &&
          _series.connectorLineSettings.dashArray![1] != 0) {
        linePath.moveTo(_x1, _y1);
        linePath.lineTo(_x2, _y2);
        _drawDashedLine(canvas, _series.connectorLineSettings.dashArray!,
            connectorLineStrokePaint!, linePath);
      } else {
        canvas.drawLine(
            Offset(_x1, _y1), Offset(_x2, _y2), connectorLineStrokePaint!);
      }
    }
  }
}