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V24.1

HeatmapControl.CustomPaint Event

Occurs after all the heatmap’s visual elements have been drawn.

Namespace: DevExpress.XtraCharts.Heatmap

Assembly: DevExpress.XtraCharts.v24.1.UI.dll

NuGet Package: DevExpress.Win.Charts

Declaration

public event HeatmapCustomPaintEventHandler CustomPaint

Event Data

The CustomPaint event's data class is HeatmapCustomPaintEventArgs. The following properties provide information specific to this event:

Property Description
Bounds Gets the bounds of a custom graphic object.
DXGraphics Gets the custom graphic object.

Remarks

Use the CustomPaint event to draw custom graphics over your heatmap.

The following example shows how to handle the CustomPaint event to draw a custom frame on a heatmap surface:

using DevExpress.Drawing;
using DevExpress.XtraCharts.Heatmap;
using System.Drawing;

namespace TestHeatmap {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
            // ...
            heatmapControl1.CustomPaint += heatmapControl1_CustomPaint_1;
        }
        void heatmapControl1_CustomPaint_1(object sender, HeatmapCustomPaintEventArgs e) {
            using(DXPen pen = new DXPen(Color.Red, 2)) {
                e.DXGraphics.DrawRectangle(pen, this.heatmapControl1.Diagram.GetBounds());    
            }
        }
    }
}
See Also