HeatmapObjectColorProvider Class
Converts colors from cell values and applies these colors to cells. This is the default color provider.
Namespace: DevExpress.XtraCharts.Heatmap
Assembly: DevExpress.XtraCharts.v21.2.dll
Declaration
Remarks
Use the HeatmapControl.ColorProvider property to assign a HeatmapObjectColorProvider object to the heatmap.
When a heatmap uses HeatmapMatrixAdapter to load data, HeatmapObjectColorProvider converts numeric values stored in HeatmapMatrixAdapter.Values to colors.
When a heatmap uses HeatmapDataSourceAdapter to load data, HeatmapObjectColorProvider converts color data member values to colors. A color data member can store the following values:
- An integer ARGB color value (431493885)
- Three or six digit hex code (#fc0, #ff005d)
- A string color name (SkyBlue)
- A Color object
Examples
The following example converts heatmap cell values to colors:
using DevExpress.Utils;
using DevExpress.XtraCharts;
using DevExpress.XtraCharts.Heatmap;
using System.Drawing;
using System.Windows.Forms;
namespace HeatmapMatrixAdapterSample {
public partial class Form1 : Form {
HeatmapControl heatmap;
public Form1() {
InitializeComponent();
heatmap = new HeatmapControl();
heatmap.Name = "Heatmap";
this.Controls.Add(heatmap);
heatmap.Dock = DockStyle.Fill;
HeatmapMatrixAdapter dataAdapter = new HeatmapMatrixAdapter();
dataAdapter.XArguments = new string[] { "1", "2", "3" };
dataAdapter.YArguments = new string[] { "A", "B", "C" };
dataAdapter.Values = new double[,] {
{ -460545, -1644806, -2031617,},
{ -5247250, -5185306, -7876870 },
{ -12156236, -12042869, -16777088 }
};
heatmap.DataAdapter = dataAdapter;
heatmap.ColorProvider = new HeatmapObjectColorProvider();
heatmap.AxisY.Reverse = true;
heatmap.Label.Pattern = "{V}";
heatmap.Label.Visible = true;
heatmap.Label.BackColor = Color.FromArgb(120, 255, 255, 255);
}
}
}
Inheritance
Object
DevExpress.XtraCharts.Native.NotificationElement
HeatmapColorProviderBase
HeatmapObjectColorProvider
See Also
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