drawDataSet method

void drawDataSet(Canvas c, IBubbleDataSet dataSet)

Implementation

void drawDataSet(Canvas c, IBubbleDataSet dataSet) {
  if (dataSet.getEntryCount() < 1) return;

  Transformer trans = _provider!.getTransformer(dataSet.getAxisDependency())!;

  double phaseY = animator!.getPhaseY();

  xBounds!.set(_provider!, dataSet);

  sizeBuffer[0] = 0;
  sizeBuffer[2] = 1;

  trans.pointValuesToPixel(sizeBuffer);

  bool normalizeSize = dataSet.isNormalizeSizeEnabled();

  // calcualte the full width of 1 step on the x-axis
  final double maxBubbleWidth = (sizeBuffer[2]! - sizeBuffer[0]!).abs();
  final double maxBubbleHeight =
      (viewPortHandler!.contentBottom() - viewPortHandler!.contentTop())
          .abs();
  final double referenceSize = min(maxBubbleHeight, maxBubbleWidth);

  for (int j = xBounds!.min!; j <= xBounds!.range! + xBounds!.min!; j++) {
    final BubbleEntry entry = dataSet.getEntryForIndex(j)!;

    pointBuffer[0] = entry.x;
    pointBuffer[1] = entry.y * phaseY;
    trans.pointValuesToPixel(pointBuffer);

    double shapeHalf = getShapeSize(
            entry.size, dataSet.getMaxSize(), referenceSize, normalizeSize) /
        2;

    if (!viewPortHandler!.isInBoundsTop(pointBuffer[1]! + shapeHalf) ||
        !viewPortHandler!.isInBoundsBottom(pointBuffer[1]! - shapeHalf)) {
      continue;
    }

    if (!viewPortHandler!.isInBoundsLeft(pointBuffer[0]! + shapeHalf)) {
      continue;
    }

    if (!viewPortHandler!.isInBoundsRight(pointBuffer[0]! - shapeHalf)) break;

    final Color color = dataSet.getColor2(entry.x.toInt());

    renderPaint!.color = color;
    c.drawCircle(
        Offset(pointBuffer[0]!, pointBuffer[1]!), shapeHalf, renderPaint!);
  }
}