ChartControl.ToolTipEnabled Property

Gets or sets a value that specifies whether or not a tooltip is enabled for a chart.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v20.1.UI.dll

Declaration

public DefaultBoolean ToolTipEnabled { get; set; }
Public Property ToolTipEnabled As DefaultBoolean

Property Value

Type Description
DefaultBoolean

Default - a tooltip's state (enabled/disabled) is automatically determined according to the type of a diagram currently displayed on a chart; True - a tooltip is enabled in a chart; False - a tooltip is disabled.

Remarks

Use the ToolTipEnabled property to activate (deactivate) a tooltip at the level of a ChartControl.

After that, it becomes possible to customize the tooltip appearance and position on a diagram via the ChartControl.ToolTipOptions property.

You can also change the tooltip content via the SeriesBase.ToolTipPointPattern property.

The following table shows this property in action.

ToolTipEnabled=True ToolTipEnabled=False
ToolTipEnabled - true ToolTipEnabled - false

For more information on how to use a tooltip, refer to the Tooltip topic.

Examples

This example demonstrates how to enable and customize chart tooltips at runtime.

To enable tooltips, set the ChartControl.ToolTipEnabled property to true.

To learn more on chart tooltips, see the Tooltips topic.

using DevExpress.XtraCharts;
using System;
using System.Windows.Forms;
using DevExpress.Utils;

namespace TooltipCustomization {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e) {
            // Create an empty chart.
            ChartControl chartControl = new ChartControl();

            // Add the chart to the form.
            chartControl.Dock = DockStyle.Fill;
            this.Controls.Add(chartControl);

            // Create a series and add points to it.
            Series series1 = new Series("Series 1", ViewType.Bar);
            series1.Points.Add(new SeriesPoint("A", new double[] { 4 }));
            series1.Points.Add(new SeriesPoint("B", new double[] { 2 }));
            series1.Points.Add(new SeriesPoint("C", new double[] { 17 }));
            series1.Points.Add(new SeriesPoint("D", new double[] { 4 }));
            series1.Points.Add(new SeriesPoint("E", new double[] { 17 }));
            series1.Points.Add(new SeriesPoint("F", new double[] { 12 }));
            series1.Points.Add(new SeriesPoint("G", new double[] { 15 }));

            // Add the series to the chart.
            chartControl.Series.Add(series1);

            // Disable a crosshair cursor.
            chartControl.CrosshairEnabled = DefaultBoolean.False;

            // Enable chart tooltips. 
            chartControl.ToolTipEnabled = DefaultBoolean.True;

            // Show a tooltip's beak
            ToolTipController controller = new ToolTipController();
            chartControl.ToolTipController = controller;
            controller.ShowBeak = true;

            // Change the default tooltip mouse position to relative position.
            ToolTipRelativePosition relativePosition = new ToolTipRelativePosition();
            chartControl.ToolTipOptions.ToolTipPosition = relativePosition;

            // Specify the tooltip relative position offsets.  
            relativePosition.OffsetX = 2;
            relativePosition.OffsetY = 2;

            // Specify the tooltip point pattern.
            series1.ToolTipPointPattern = "Bar Series: {A}:{V}";
        }
    }
}
See Also