internal override object GetCombineGroupKey(DataPoint point)
{
object value = point.GetValueForAxis(this);
if (value != null)
{
return(value);
}
return(base.GetCombineGroupKey(point));
}
/// <summary>
/// Gets the stack sum value for each DataPoint in a stack group used by a CombineStrategy.
/// The result is the transformed value of the stack sum of the DataPoint values.
/// </summary>
/// <param name="point">The data point.</param>
/// <param name="transformedStackSumValue">The transformed value of the stack sum of the DataPoint values.</param>
/// <param name="positive">Determines whether the point value is positive relative to the plot origin.</param>
/// <param name="positiveValuesSum">The present sum of positive DataPoint values in the stack. Updated if the DataPoint value is positive.</param>
/// <param name="negativeValuesSum">The present sum of negative DataPoint values in the stack. Updated if the DataPoint value is negative.</param>
/// <returns>Value that indicates whether the <paramref name="transformedStackSumValue"/> is calculated successfully.</returns>
internal override bool TryGetStackSumValue(DataPoint point, out double transformedStackSumValue, out bool positive, ref double positiveValuesSum, ref double negativeValuesSum)
{
double doubleValue = DefaultOrigin;
if (!point.isEmpty)
{
var objectValue = point.GetValueForAxis(this);
if (!(objectValue is Range))
{
doubleValue = (double)objectValue;
}
}
double transformedValue = this.TransformValue(doubleValue);
if (double.IsNaN(transformedValue))
{
// Invalid state
transformedStackSumValue = double.NaN;
positive = false;
return(false);
}
positive = transformedValue >= DefaultOrigin;
if (positive)
{
positiveValuesSum += doubleValue;
transformedStackSumValue = this.TransformValue(positiveValuesSum);
}
else
{
negativeValuesSum += doubleValue;
transformedStackSumValue = this.TransformValue(negativeValuesSum);
}
return(true);
}
internal virtual object GetCategoryValue(DataPoint point)
{
return(point.GetValueForAxis(this));
}