drawVerticalText method

@override void drawVerticalText(dynamic canvas, dynamic textStyle, int gridRows)

Implementation

@override
void drawVerticalText(canvas, textStyle, int gridRows) {
  double rowSpace = chartRect.height / gridRows;
  for (var i = 0; i <= gridRows; ++i) {
    double value = (gridRows - i) * rowSpace / scaleY + minValue;
    TextSpan span = TextSpan(text: "${format(value)}", style: textStyle);
    TextPainter tp =
        TextPainter(text: span, textDirection: TextDirection.ltr);
    tp.layout();

    double offsetX;
    switch (verticalTextAlignment) {
      case VerticalTextAlignment.left:
        offsetX = 0;
        break;
      case VerticalTextAlignment.right:
        offsetX = chartRect.width - tp.width;
        break;
    }

    if (i == 0) {
      tp.paint(canvas, Offset(offsetX, topPadding));
    } else {
      tp.paint(
          canvas, Offset(offsetX, rowSpace * i - tp.height + topPadding));
    }
  }
}