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KeyColorColorizer Class

corelibraries-devexpress-dot-xtracharts-5681f8ba.md

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KeyColorColorizer Class

A colorizer that allows users to choose the color depending on the SeriesBase.ColorDataMember values used as key values.

Namespace : DevExpress.XtraCharts

Assembly : DevExpress.XtraCharts.v25.2.dll

NuGet Package : DevExpress.Charts

Declaration

csharp
public class KeyColorColorizer :
    ChartPaletteColorizerBase
vb
Public Class KeyColorColorizer
    Inherits ChartPaletteColorizerBase

Remarks

This class introduces the KeyColorColorizer.Keys property that specifies keys associated with colors, and the KeyColorColorizer.KeyProvider property, that specifies how to obtain the key for SeriesBase.ColorDataMember values.

Use the SeriesViewBase.Colorizer property to assign the colorizer to a series view.

Refer to the Series Point Colorizer topic for more information about colorizers.

Example

To configure and use the Key-Color colorizer, perform the following steps.

csharp
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Xml.Linq;
using DevExpress.XtraCharts;

namespace KeyColorColorizerExample {
    public partial class Form1 : Form {
        const string filepath = "..//..//Data//GDP.xml";

        public Form1() {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e) {
            #region #BarSeries
            // Create and customize a bar series.
            Series barSeries = new Series() {
                DataSource = LoadData(filepath),
                ArgumentDataMember = "Country",
                ColorDataMember = "Region",
                View = new SideBySideBarSeriesView()
            };
            barSeries.View.Colorizer = CreateColorizer();
            barSeries.ValueDataMembers.AddRange(new string[] { "Product" });
            #endregion #BarSeries

            // Add the series to the ChartControl's Series collection.
            chartControl1.Series.Add(barSeries);

            // Show a title for the values axis.
            ((XYDiagram)chartControl1.Diagram).AxisY.Title.Text = "GDP per capita, $";
            ((XYDiagram)chartControl1.Diagram).AxisY.Title.Visibility = DevExpress.Utils.DefaultBoolean.True;
        }

        #region #KeyColorColorier
        // Creates the Key-Color colorizer for the bar chart.
        ChartColorizerBase CreateColorizer() {
            KeyColorColorizer colorizer = new KeyColorColorizer() {
                PaletteName = "Apex"
            };
            colorizer.Keys.Add("Africa");
            colorizer.Keys.Add("America");
            colorizer.Keys.Add("Asia");
            colorizer.Keys.Add("Australia");
            colorizer.Keys.Add("Europe");

            return colorizer;
        }
        #endregion #KeyColorColorier

        #region #DataLoad
        class HpiPoint {
            public string Country { get; set; }
            public double Product { get; set; }
            public string Region { get; set; }
        }

        // Loads data from an XML data source.
        static List<HpiPoint> LoadData(string filepath) {
            XDocument doc = XDocument.Load(filepath);
            List<HpiPoint> points = new List<HpiPoint>();
            foreach (XElement element in doc.Element("G20HPIs").Elements("CountryStatistics")) {
                points.Add(new HpiPoint() {
                    Country = element.Element("Country").Value,
                    Product = Convert.ToDouble(element.Element("Product").Value),
                    Region = element.Element("Region").Value
                });
            }
            return points;
        }
        #endregion #DataLoad
    }
}
vb
Imports System
Imports System.Collections.Generic
Imports System.Windows.Forms
Imports System.Xml.Linq
Imports DevExpress.XtraCharts

Namespace KeyColorColorizerExample
    Partial Public Class Form1
        Inherits Form

        Private Const filepath As String = "..//..//Data//GDP.xml"

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
' #Region "#BarSeries"
            ' Create and customize a bar series.
            Dim barSeries As New Series() With {
                .DataSource = LoadData(filepath),
                .ArgumentDataMember = "Country",
                .ColorDataMember = "Region",
                .View = New SideBySideBarSeriesView()
            }
            barSeries.View.Colorizer = CreateColorizer()
            barSeries.ValueDataMembers.AddRange(New String() { "Product" })
' #End Region ' #BarSeries

            ' Add the series to the ChartControl's Series collection.
            chartControl1.Series.Add(barSeries)

            ' Show a title for the values axis.
            CType(chartControl1.Diagram, XYDiagram).AxisY.Title.Text = "GDP per capita, $"
            CType(chartControl1.Diagram, XYDiagram).AxisY.Title.Visibility = DevExpress.Utils.DefaultBoolean.True
        End Sub

        #Region "#KeyColorColorier"
        ' Creates the Key-Color colorizer for the bar chart.
        Private Function CreateColorizer() As ChartColorizerBase
            Dim colorizer As New KeyColorColorizer() With {.PaletteName = "Apex"}
            colorizer.Keys.Add("Africa")
            colorizer.Keys.Add("America")
            colorizer.Keys.Add("Asia")
            colorizer.Keys.Add("Australia")
            colorizer.Keys.Add("Europe")

            Return colorizer
        End Function
        #End Region ' #KeyColorColorier

        #Region "#DataLoad"
        Private Class HpiPoint
            Public Property Country() As String
            Public Property Product() As Double
            Public Property Region() As String
        End Class

        ' Loads data from an XML data source.
        Private Shared Function LoadData(ByVal filepath As String) As List(Of HpiPoint)
            Dim doc As XDocument = XDocument.Load(filepath)
            Dim points As New List(Of HpiPoint)()
            For Each element As XElement In doc.Element("G20HPIs").Elements("CountryStatistics")
                points.Add(New HpiPoint() With {
                    .Country = element.Element("Country").Value,
                    .Product = Convert.ToDouble(element.Element("Product").Value),
                    .Region = element.Element("Region").Value
                })
            Next element
            Return points
        End Function
        #End Region ' #DataLoad
    End Class
End Namespace
xml
<?xml version="1.0" encoding="utf-8" ?>
<G20HPIs>
  <CountryStatistics>
    <Country>Argentina</Country>
    <Region>America</Region>
    <Product>16011.6728032264</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Australia</Country>
    <Region>Australia</Region>
    <Product>38159.6336533223</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Brazil</Country>
    <Region>America</Region>
    <Product>11210.3908053823</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Canada</Country>
    <Region>America</Region>
    <Product>39050.1673163719</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>China</Country>
    <Region>Asia</Region>
    <Product>7599</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>France</Country>
    <Region>Europe</Region>
    <Product>34123.1966249035</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Germany</Country>
    <Region>Europe</Region>
    <Product>37402.2677660974</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>India</Country>
    <Region>Asia</Region>
    <Product>3425.4489267524</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Indonesia</Country>
    <Region>Asia</Region>
    <Product>4325.2533282173</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Italy</Country>
    <Region>Europe</Region>
    <Product>31954.1751781228</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Japan</Country>
    <Region>Asia</Region>
    <Product>33732.8682226596</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Mexico</Country>
    <Region>America</Region>
    <Product>14563.884253986</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Russia</Country>
    <Region>Europe</Region>
    <Product>19891.3528339013</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Saudi Arabia</Country>
    <Region>Asia</Region>
    <Product>22713.4852913284</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>South Africa</Country>
    <Region>Africa</Region>
    <Product>10565.1840563081</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>South Korea</Country>
    <Region>Asia</Region>
    <Product>29101.0711400706</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Turkey</Country>
    <Region>Africa</Region>
    <Product>15686.860167575</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>United Kingdom</Country>
    <Region>Europe</Region>
    <Product>35686.1997705521</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Spain</Country>
    <Region>Europe</Region>
    <Product>32230.3585974199</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>USA</Country>
    <Region>America</Region>
    <Product>47153.0094273427</Product>
  </CountryStatistics>
</G20HPIs>
xml
<?xml version="1.0" encoding="utf-8" ?>
<G20HPIs>
  <CountryStatistics>
    <Country>Argentina</Country>
    <Region>America</Region>
    <Product>16011.6728032264</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Australia</Country>
    <Region>Australia</Region>
    <Product>38159.6336533223</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Brazil</Country>
    <Region>America</Region>
    <Product>11210.3908053823</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Canada</Country>
    <Region>America</Region>
    <Product>39050.1673163719</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>China</Country>
    <Region>Asia</Region>
    <Product>7599</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>France</Country>
    <Region>Europe</Region>
    <Product>34123.1966249035</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Germany</Country>
    <Region>Europe</Region>
    <Product>37402.2677660974</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>India</Country>
    <Region>Asia</Region>
    <Product>3425.4489267524</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Indonesia</Country>
    <Region>Asia</Region>
    <Product>4325.2533282173</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Italy</Country>
    <Region>Europe</Region>
    <Product>31954.1751781228</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Japan</Country>
    <Region>Asia</Region>
    <Product>33732.8682226596</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Mexico</Country>
    <Region>America</Region>
    <Product>14563.884253986</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Russia</Country>
    <Region>Europe</Region>
    <Product>19891.3528339013</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Saudi Arabia</Country>
    <Region>Asia</Region>
    <Product>22713.4852913284</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>South Africa</Country>
    <Region>Africa</Region>
    <Product>10565.1840563081</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>South Korea</Country>
    <Region>Asia</Region>
    <Product>29101.0711400706</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Turkey</Country>
    <Region>Africa</Region>
    <Product>15686.860167575</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>United Kingdom</Country>
    <Region>Europe</Region>
    <Product>35686.1997705521</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>Spain</Country>
    <Region>Europe</Region>
    <Product>32230.3585974199</Product>
  </CountryStatistics>
  <CountryStatistics>
    <Country>USA</Country>
    <Region>America</Region>
    <Product>47153.0094273427</Product>
  </CountryStatistics>
</G20HPIs>

Implements

IColorizer

ILegendItemProvider

Inheritance

Object ChartElement ChartColorizerBase ChartPaletteColorizerBase KeyColorColorizer

See Also

KeyColorColorizer Members

DevExpress.XtraCharts Namespace