/// <summary>
/// This method creates the Highlight object that also indicates which value of a stacked BarEntry has been
/// selected.
/// </summary>
/// <param name="high">the Highlight to work with looking for stacked values</param>
/// <param name="dataSet"></param>
/// <param name="xVal"></param>
/// <param name="yVal"></param>
/// <returns></returns>
public Highlight GetStackedHighlight(Highlight high, IDataSet <BarEntry> dataSet, float xVal, float yVal)
{
BarEntry entry = dataSet.EntryForXValue(xVal, yVal);
if (entry == null)
{
return(null);
}
// not stacked
if (entry.YVals == null)
{
return(high);
}
else
{
var ranges = entry.Ranges;
if (ranges.Count > 0)
{
int stackIndex = GetClosestStackIndex(ranges, yVal);
var pixels = Chart.GetTransformer(dataSet.AxisDependency).PointValueToPixel(high.X, ranges[stackIndex].To);
Highlight stackedHigh = new Highlight(
entry.X,
entry.Y,
(float)pixels.X,
(float)pixels.Y,
high.DataSetIndex,
stackIndex,
high.Axis
);
return(stackedHigh);
}
}
return(null);
}
/// <summary>
/// An array of `Highlight` objects corresponding to the selected xValue and dataSetIndex.
/// </summary>
protected virtual IList <Highlight> BuildHighlights(IDataSet set, int dataSetIndex, float xVal, DataSetRounding rounding)
{
IList <Highlight> highlights = new List <Highlight>();
//noinspection unchecked
IList <Entry> entries = set.EntriesForXValue(xVal);
if (entries.Count == 0)
{
// Try to find closest x-value and take all entries for that x-value
Entry closest = set.EntryForXValue(xVal, float.NaN, rounding);
if (closest != null)
{
//noinspection unchecked
entries = set.EntriesForXValue(closest.X);
}
}
if (entries.Count == 0)
{
return(highlights);
}
foreach (Entry e in entries)
{
var pixels = Chart.GetTransformer(
set.AxisDependency).PointValueToPixel(e.X, e.Y);
highlights.Add(new Highlight(
e.X, e.Y,
(float)pixels.X, (float)pixels.Y,
dataSetIndex, set.AxisDependency));
}
return(highlights);
}
