RangeBarSeries.PointColorizer Property
Gets or sets a colorizer that specifies how to color-code bars.
Namespace: DevExpress.XamarinForms.Charts
Assembly: DevExpress.XamarinForms.Charts.dll
NuGet Package: DevExpress.XamarinForms.Charts
Declaration
public IRangePointColorizer PointColorizer { get; set; }Property Value
| Type | Description |
|---|---|
| IRangePointColorizer | A colorizer object. |
Remarks
A point colorizer allows you to specify one or more conditions based on which a chart applies colors to series points (bars).
You can use a predefined colorizer or implement a custom colorizer for series points.
Use a Predefined Colorizer
The ChartView ships with point and value range colorizers that use predefined algorithms to select point colors.
- Point Colorizer
Assign a ColorEachPointColorizer object to the PointColorizer property of the series to access colors from the default or custom palette.
- Value Range Colorizer
You can color series points based on their Y-axis values.
- Assign a RangeValueBandPointColorizer object to the PointColorizer property of the series.
- Populate the colorizer’s ColorStops collection with ColorStop objects. Each ColorStop object defines a value range (a pair of Y-axis values) and color. If a Y-axis value falls within the range, the point is painted with this color. Use the ValueLevel property to specify which of two point values (Low or High) should be evaluated.
Implement a Custom Colorizer
- Point Colorizer
The ChartView can color points of a series according to a custom algorithm based on point arguments/values and values of the chart’s bound data source.
Create a class that implements the IRangeCustomPointColorizer or IIndexBasedCustomPointColorizer interface and assign this class instance to the PointColorizer property of the series.
- Value Range Colorizer
A predefined value range colorizer colors points according to their Y-axis values. If you require a series point color to indicate a value of the specified data source field, implement a custom value range colorizer. To do this:
- Assign a CustomValueBandPointColorizer object to the PointColorizer property of the series.
- Create a class that implements the ICustomColorizerNumericValueProvider interface and its GetValueForColorizer method that returns a value from the data source based on which a series point should be colored. Assign this class value to the colorizer’s ValueProvider property.
- Populate the colorizer’s ColorStops collection with ColorStop objects. Each ColorStop object defines a value range and color. If a value that the GetValueForColorizer method returns for a series point falls within the range, the point is painted with this color.