DXCalculatedSeries Class
The base class for all series that calculate its values by another series’s data.
Namespace: DevExpress.Xamarin.iOS.Charts
Assembly: DevExpress.Xamarin.iOS.Charts.dll
NuGet Package: DevExpress.XamarinForms.Charts
Declaration
public class DXCalculatedSeries :
DXSeriesRemarks
The Calculated Series displays values that it computes by data points another series provides. The series utilizes a formula a concrete descendant implements to calculate values. The concrete formula can utilize values of several data points or can use several values of a data point. The source series’ available data types depend on the concrete calculated series.
Note
You should use the DXCalculatedSeries class’ descendants to display calculated data in DXChart instead of utilizing this class directly.
This topic contains general series customization information. Refer to descendant class descriptions to learn more about their data requirements and features.
How to: Specify Series Data
This example demonstrates how to implement the calculated series’ data source:
// In the ViewDidLoad method.
DXStockSeries stockSeries = InitStock();
this.chart.AddSeries(stockSeries);
this.chart.AddSeries(
new DXMovingAverageIndicator {
Data = new CalculatedSeriesData(stockSeries),
ValueLevel = DXValueLevel.Close,
PointsCount = 21,
DisplayName = "MA (21)",
ShowInLegend = true
}
);
// ...
public class CalculatedSeriesData: DXCalculatedSeriesData {
DXSeries series;
public CalculatedSeriesData(DXSeries series) {
this.series = series;
}
public override DXSeries Source => series;
}
The code above uses the classes and members below:
Symbol | Description |
|---|---|
The Simple Moving Average overlay indicator. | |
Gets or sets data the series display on the Chart. | |
| |
|
Important
The source series’s data must be compatible with the type of a calculated series’ that utilizes this source series. For example, the DXMassIndexIndicator requires the DXFinancialSeriesData source series data type. Refer to calculated seres descendants to learn the source series data limitations.
How to: Configure Series Hint Options
The chart Hint interacts with series to request values to display, to ask series what axis lines the Crosshair should display, etc.
The following code specifies how the hint displays the series:
series.HintOptions = new DXSeriesCrosshairOptions {
PointTextPattern = "{S}: ${V$##}K",
ShowInLabel = true,
AxisLineHidden = false,
AxisLabelHidden = true,
};
The series can utilize the classes and properties below to configure how the hint displays it:
Symbol | Description |
|---|---|
| |
| |
| |
| |
| |
|
Note
Properties the DXSeriesCrosshairOptions class introduces do not affect the hint when the hint’s Behavior is set to DXTooltipHintBehavior. At the same time, all properties the class inherits from its parent influence the hint.