RangeSegmentColorizer Class

The colorizer that allows you to color a line segment based on a its value range.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v23.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

public class RangeSegmentColorizer :
    SegmentColorizerBase,
    IRangeSegmentColorizer,
    IPaletteProvider,
    IPaletteRepositoryHolder,
    ISupportPropertyChanged,
    ILegendItemProvider,
    IPatternHolder

VB.NET

Public Class RangeSegmentColorizer
    Inherits SegmentColorizerBase
    Implements IRangeSegmentColorizer,
               IPaletteProvider,
               IPaletteRepositoryHolder,
               ISupportPropertyChanged,
               ILegendItemProvider,
               IPatternHolder

Remarks

You can use the RangeSegmentColorizer to color the line series view and its descendants. To do this, assign the RangeSegmentColorizer object to the LineSeriesView.SegmentColorizer property.

Use the following properties to configure the RangeSegmentColorizer:

• The RangeStops contains numerical values on which a color should change.
• Use the Palette and PaletteName properties to specify a palette that stores colors for the colorizer. You can use the built-in palettes that the Palettes class stores.
• The LegendItemPattern property allows you to format a text the legend shows for each color range. Note the ShowInLegend property should be enabled.

Example

This example demonstrates how to use the RangeSegmentColorizer to color a line series by its segments.

Follow the steps below to configure the RangeSegmentColorizer object and apply it to a line series view:

• Create a RangeSegmentColorizer instance and assign it to the LineSeriesView.SegmentColorizer property.

• Populate the RangeSegmentColorizer.RangeStops collection.

• Use the RangeSegmentColorizer.Palette property to define a palette.

• The RangeSegmentColorizer.LegendItemPattern property allows you to specify how to format text the legend shows for each color range.

C#

RangeSegmentColorizer colorizer = new RangeSegmentColorizer();
colorizer.RangeStops.AddRange(new double[] { -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30 });
colorizer.Palette = new Palette("TemperaturePalette", new PaletteEntry[] { new PaletteEntry(Color.DarkBlue),
                                                                           new PaletteEntry(Color.SteelBlue),
                                                                           new PaletteEntry(Color.LightBlue),
                                                                           new PaletteEntry(Color.Yellow),
                                                                           new PaletteEntry(Color.OrangeRed) });
// Alternatively, you can use PaletteName to specify a palette.
// colorizer.PaletteName = Palettes.Slipstream.DisplayName;
colorizer.ShowInLegend = true;
colorizer.LegendItemPattern = "{V1:F0}°C — {V2:F0}°C";
LineSeriesView lineSeriesView = chartControl.Series[0].View as LineSeriesView;
lineSeriesView.SegmentColorizer = colorizer;

VB.NET

Dim colorizer As RangeSegmentColorizer = New RangeSegmentColorizer
colorizer.RangeStops.AddRange(New Double() {-40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30})
colorizer.Palette = New Palette("TemperaturePalette", New PaletteEntry() { New PaletteEntry(Color.DarkBlue), 
                                                                           New PaletteEntry(Color.SteelBlue), 
                                                                           New PaletteEntry(Color.LightBlue), 
                                                                           New PaletteEntry(Color.Yellow), 
                                                                           New PaletteEntry(Color.OrangeRed)})
' Alternatively, you can use PaletteName to specify a palette.  
' colorizer.PaletteName = Palettes.Slipstream.DisplayName                                                                         
colorizer.ShowInLegend = true
colorizer.LegendItemPattern = "{V1:F0}°C — {V2:F0}°C"
Dim lineSeriesView As LineSeriesView = CType(chartControl.Series(0).View,LineSeriesView)
lineSeriesView.SegmentColorizer = colorizer

Implements

ILegendItemProvider

Inheritance

Object

ChartElement

SegmentColorizerBase

RangeSegmentColorizer