ChartHitInfoBase.AxisTitle Property

Gets an axis title which is located under the test point.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v21.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

public AxisTitle AxisTitle { get; }

VB.NET

Public ReadOnly Property AxisTitle As AxisTitle

Property Value

Type	Description
AxisTitle	An AxisTitle object which represents the axis title located under the test point.

Remarks

Use the AxisTitle property to access the axis title located under the test point if the ChartHitInfo.InAxis property returns true.

Note

The AxisTitle property returns null (Nothing in Visual Basic), if the ChartHitInfoBase.InAxis property is set to false. The AxisTitle property isn’t null only if the mouse pointer actually hovers over an axis title, so the AxisTitle property may return null even if the ChartHitInfoBase.InAxis property is set to true.

For more information, refer to Axis Titles.

Example

This example demonstrates how you can determine whether an axis title is being hovered by the mouse pointer, and if so, display its type (AxisTitleX or AxisTitleY) in a tooltip.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-determine-if-an-axis-title-is-being-hovered-by-the-mouse-pointer-t284024

SampleForm.cs

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

namespace AxisTitleHitTestSample {
    public partial class SampleForm : Form {
        public SampleForm() {
            InitializeComponent();
        }

        private void OnMouseMove(object sender, MouseEventArgs e) {
            ChartHitInfo hitInfo = chart.CalcHitInfo(e.X, e.Y);
            if (hitInfo.AxisTitle != null)
                tooltipController.ShowHint(
                    String.Format(
                        "The pointer is over the {0} object.", 
                        hitInfo.AxisTitle.GetType().ToString()
                    )
                );
            else
                tooltipController.HideHint();
        }
    }
}

SampleForm.vb

Imports DevExpress.XtraCharts
Imports System
Imports System.Windows.Forms

Namespace AxisTitleHitTestSample
    Partial Public Class SampleForm
        Inherits Form

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Overloads Sub OnMouseMove(ByVal sender As Object, ByVal e As MouseEventArgs) Handles chart.MouseMove
            Dim hitInfo As ChartHitInfo = chart.CalcHitInfo(e.X, e.Y)
            If hitInfo.AxisTitle IsNot Nothing Then
                tooltipController.ShowHint(String.Format("The pointer is over the {0} object.", hitInfo.AxisTitle.GetType().ToString()))
            Else
                tooltipController.HideHint()
            End If
        End Sub
    End Class
End Namespace