drawDataLabelWithBackground method

void drawDataLabelWithBackground(int index, Canvas canvas, String dataLabel, Offset offset, int angle, TextStyle style, Paint fillPaint, Paint strokePaint,)

Implementation

void drawDataLabelWithBackground(
  int index,
  Canvas canvas,
  String dataLabel,
  Offset offset,
  int angle,
  TextStyle style,
  Paint fillPaint,
  Paint strokePaint,
) {
  final EdgeInsets margin = dataLabelSettings.margin;
  final Offset settingsOffset = dataLabelSettings.offset;
  if (!dataLabelSettings.showZeroValue && dataLabel == '0') {
    return;
  }
  if (!offset.dx.isNaN && !offset.dy.isNaN) {
    if (dataLabel.isNotEmpty) {
      // TODO(VijayakumarM): Check and optimize.
      if (fillPaint.color != Colors.transparent ||
          (strokePaint.color != const Color.fromARGB(0, 25, 5, 5) &&
              strokePaint.strokeWidth > 0)) {
        final TextPainter textPainter = TextPainter(
          text: TextSpan(text: dataLabel, style: style),
          textDirection: TextDirection.ltr,
        )..layout();
        final RRect labelRect = RRect.fromRectAndRadius(
            Rect.fromLTWH(
              offset.dx + settingsOffset.dx,
              offset.dy - settingsOffset.dy,
              textPainter.width + margin.horizontal,
              textPainter.height + margin.vertical,
            ),
            Radius.circular(dataLabelSettings.borderRadius));
        canvas.save();
        canvas.translate(labelRect.center.dx, labelRect.center.dy);
        canvas.rotate((angle * pi) / 180);
        canvas.translate(-labelRect.center.dx, -labelRect.center.dy);
        if (strokePaint.color != Colors.transparent &&
            strokePaint.strokeWidth > 0) {
          canvas.drawRRect(labelRect, strokePaint);
        }

        if (fillPaint.color != Colors.transparent) {
          canvas.drawRRect(labelRect, fillPaint);
        }
        canvas.restore();
      }
    }
  }
  drawDataLabel(
      index,
      canvas,
      dataLabel,
      offset.dx + settingsOffset.dx + margin.left,
      offset.dy - settingsOffset.dy + margin.top,
      angle,
      style);
}