pointToCanvas method

Offset pointToCanvas(ChartDataPoint point, Size size, double minX, double maxX, double minY, double maxY,)

Convert data point to canvas coordinates (optimized)

Implementation

Offset pointToCanvas(
  ChartDataPoint point,
  Size size,
  double minX,
  double maxX,
  double minY,
  double maxY,
) {
  // Validate inputs
  if (!point.x.isFinite || !point.y.isFinite) {
    return Offset(size.width / 2, size.height / 2);
  }

  if (!size.width.isFinite ||
      !size.height.isFinite ||
      size.width <= 0 ||
      size.height <= 0) {
    return const Offset(0, 0);
  }

  if (!minX.isFinite || !maxX.isFinite || !minY.isFinite || !maxY.isFinite) {
    return Offset(size.width / 2, size.height / 2);
  }

  // Pre-calculate ranges for better performance
  final xRange = maxX - minX;
  final yRange = maxY - minY;

  // Avoid division by zero or invalid ranges
  if (xRange <= 0 || !xRange.isFinite || yRange <= 0 || !yRange.isFinite) {
    return Offset(size.width / 2, size.height / 2);
  }

  // Calculate coordinates with validation
  final x = ((point.x - minX) / xRange) * size.width;
  final y = size.height - ((point.y - minY) / yRange) * size.height;

  // Validate calculated values are finite before returning
  if (!x.isFinite || !y.isFinite) {
    return Offset(size.width / 2, size.height / 2);
  }

  return Offset(x, y);
}