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CustomPalette Class

Represents a palette that contains a specified set of colors.

Namespace: DevExpress.DashboardCommon

Assembly: DevExpress.Dashboard.v22.1.Core.dll

Declaration

public class CustomPalette :
    MapPalette

Remarks

Use the CustomPalette.Colors property to specify colors used in the custom palette. The CustomScale.RangeStops property allows you to specify endpoints for color ranges in the custom palette.

Example

The following example demonstrates how to customize a palette of the Choropleth map.

In this example, a set of custom colors is used to color map shapes depending on the provided values. Absolute values are used to specify endpoints for color ranges.

win-dashboard-customize-map-palette

View Example

using System.Collections.Generic;
using System.Drawing;
using DevExpress.DashboardCommon;
using DevExpress.XtraEditors;

namespace Dashboard_ChoroplethMapCustomPalette {
    public partial class Form1 : XtraForm {
        public Form1() {
            InitializeComponent();
            // Loads a dashboard that contains a choropleth map with the default palette.
            Dashboard dashboard = new Dashboard();
            dashboard.LoadFromXml(@"..\..\Data\Dashboard.xml");

            // Gets the ValueMap object that provides data for coloring map shapes.
            ChoroplethMapDashboardItem map = (ChoroplethMapDashboardItem)dashboard.Items[0];
            ValueMap populationMap = (ValueMap)map.Maps[0];

            // Creates CustomPalette and CustomScale objects.
            CustomPalette customPalette = new CustomPalette();
            CustomScale customScale = new CustomScale();

            // Creates lists of custom colors and range stops.
            List<Color> customColors = new List<Color>();
            List<double> rangeStops = new List<double>();

            // Specifies that the absolute scale is used to define a set of colors.
            customScale.IsPercent = false;

            // Specifies custom colors and corresponding range stops.   
            customColors.Add(Color.LightBlue);  rangeStops.Add(100000);
            customColors.Add(Color.SkyBlue);    rangeStops.Add(1000000);
            customColors.Add(Color.LightCoral); rangeStops.Add(10000000);
            customColors.Add(Color.Tomato);     rangeStops.Add(100000000);
            customColors.Add(Color.Maroon);     rangeStops.Add(1000000000);

            // Adds custom colors and range stops to a custom palette and corresponding custom scale.
            customPalette.Colors.AddRange(customColors);
            customScale.RangeStops.AddRange(rangeStops);

            // Specifies a custom palette and scale for the ValueMap object.
            populationMap.Palette = customPalette;
            populationMap.Scale = customScale;

            // Sets the customized dashboard as a currently opened dashboard.
            dashboardViewer1.Dashboard = dashboard;
        }
    }
}

The following code snippets (auto-collected from DevExpress Examples) contain references to the CustomPalette class.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

Inheritance

Object
MapPalette
CustomPalette
See Also