KeyColorColorizer Class
A colorizer that allows choosing the color depending on the SeriesBase.ColorDataMember values used as key values.
Namespace: DevExpress.XtraCharts
Assembly: DevExpress.XtraCharts.v18.1.dll
Declaration
[TypeConverter(typeof(KeyColorColorizerTypeConverter))]
public class KeyColorColorizer :
ChartPaletteColorizerBase,
IPatternHolderRemarks
This class introduces the KeyColorColorizer.Keys property that allows specifying keys associated with colors, and the KeyColorColorizer.KeyProvider property, that allows specifying how to obtain the key for SeriesBase.ColorDataMember values.
For more information about colorizers, refer to the Series Point Colorizer topic.
Example
To configure and use the Key-Color colorizer, perform the following steps.
- Create a KeyColorColorizer object and assign it to the SeriesBase.Colorizer property.
- Populate the KeyColorColorizer.Keys collection.
- Specify the ChartPaletteColorizerBase.Palette property if you want to use a non-default palette to colorize your data.
- In addition, it’s possible to specify the KeyColorColorizer.KeyProvider property to change the way you used to provide keys based on the color data source member.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-colorize-charts-using-the-key-color-colorizer-t245198
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),
Colorizer = CreateColorizer(),
ArgumentDataMember = "Country",
ColorDataMember = "Region",
View = new SideBySideBarSeriesView()
};
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
}
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the KeyColorColorizer class.
Note
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