protected override Highlight GetClosestHighlight(int index, float x, float y)
{
var highlights = GetHighlightsAtIndex(index);
float distanceToCenter = Chart.DistanceToCenter(x, y) / Chart.Factor;
Highlight closest = null;
float distance = float.MaxValue;
for (int i = 0; i < highlights.Count; i++)
{
Highlight high = highlights[i];
float cdistance = Math.Abs(high.Y - distanceToCenter);
if (cdistance < distance)
{
closest = high;
distance = cdistance;
}
}
return(closest);
}
/// <summary>
/// Returns the Highlight of the DataSet that contains the closest value on the
/// y-axis.
/// </summary>
/// <param name="closestValues">contains two Highlight objects per DataSet closest to the selected x-position(determined by
/// rounding up an down)</param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="axis"> the closest axis</param>
/// <param name="minSelectionDistance"></param>
/// <returns></returns>
public Highlight GetClosestHighlightByPixel(IList <Highlight> closestValues, float x, float y,
YAxisDependency axis, float minSelectionDistance)
{
Highlight closest = null;
float distance = minSelectionDistance;
for (int i = 0; i < closestValues.Count; i++)
{
Highlight high = closestValues[i];
if (high.Axis == axis)
{
float cDistance = GetDistance(x, y, high.XPx, high.YPx);
if (cDistance < distance)
{
closest = high;
distance = cDistance;
}
}
}
return(closest);
}
protected float GetHighlightPos(Highlight h)
{
return(h.YPx);
}
