When MaxLimit/MinLimit are set the null what is the best way to determine the X Axis Minimum and Maximum values

[langejay]

Currently I am doing it by running an algorithm over my data, which is fine but given it is already determined when the graph is rendered, it would be good if that information is provided to you.

I am using this information to calculate the appropriate UnitWidth.

Is there a way to find out the displayed/Chart pixels as well. My unit width calculation is currently using the following code that I would like to improve, as it estimates the chart pixel width.

`

private void UpdateUnitWidth()
{

  double? min = XAxis.MinLimit;
  if (min == null)
  {
    List<double> mins = VM.GetXMin();
    if (mins.Count > 0) min = mins.Min();
  }

  double? max = XAxis.MaxLimit;
  if (max == null)
  {
    List<double> maxs = VM.GetXMax();
    if (maxs.Count > 0) max = maxs.Max();
  }

  if (min != null && max != null && min != max) {

    var pixelWidth = this.ActualWidth;
    if (pixelWidth > 0)
    {
      double dataWidth = (double)max - (double)min;
      double approxUnitsPerPixel = dataWidth / (pixelWidth - 70); // 70 approximate account for padding, axisy etc
      if (approxUnitsPerPixel < 1) XAxis.UnitWidth = 1;
      else XAxis.UnitWidth = approxUnitsPerPixel * 8;
    }
  }
}

`