/// <summary>
/// Action executed when Indicator needs to be recalculated
/// </summary>
/// <returns></returns>
protected override bool TrueAction()
{
int size = _chartPanel._chartX.RecordCount;
if (size == 0)
{
return(false);
}
double?[] values = new double?[size];
StockChartX.CustomIndicatorNeedsDataEventArgs args =
new StockChartX.CustomIndicatorNeedsDataEventArgs(this, values);
for (int i = 0; i < size; i++)
{
values[i] = this[i].Value;
}
_chartPanel._chartX.FireCustomIndicatorNeedsData(args);
int usersValuesLength = args.Values.Length;
int minLength = Math.Min(size, usersValuesLength);
Clear();
for (int i = 0; i < minLength; i++)
{
AppendValue(_chartPanel._chartX._dataManager.GetTimeStampByIndex(i), args.Values[i]);
}
_chartPanel._enforceSeriesSetMinMax = true;
_chartPanel.SetMaxMin();
return(_calculateResult = PostCalculate());
}
private void _stockChartX_CustomIndicatorNeedsData(object sender, StockChartX.CustomIndicatorNeedsDataEventArgs e)
{
double?[] data = new double?[_stockChartX.RecordCount];
//do here some calculations and pass them back to the chart
int startValue = _r.Next(20, 40);
double lastValue = startValue;
//e.Values has the values already calculated from previous call
//Here we just re-fill the array with random values
for (int i = 0; i < data.Length; i++)
{
if (_r.NextDouble() > 0.5)
{
lastValue += _r.NextDouble() * 0.25;
}
else
{
lastValue -= _r.NextDouble() * 0.25;
}
data[i] = lastValue;
}
//pass calculated values back to the chart
e.Values = data;
}