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Igor
20
HitTest doesn't work in the 2D mode
posted

Hi,

I want to get series name and value on the clicked element in the column graph.

For it I handle MouseDown event and call HitTest function. But it returns null reference in  his SelectedObject property 

It only works properly in the 3d Mode .

What is wrong? 

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  • 739
    posted

    Hi,

    The SelectedObject property from HitTestArgs is null if mouse is not above a DataPoint (Series). Only when data points are selected the SelectedObject will return a reference to a data point. This example shows how selection works:

    C#:

    using System;
    using System.IO;
    using System.Net;
    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Data;
    using System.Windows.Media;
    using System.Windows.Media.Animation;
    using System.Windows.Navigation;
    using Infragistics.Windows.Chart;

    namespace UntitledProject8
    {
     public partial class Window1
     {
      public Window1()
      {
                this.InitializeComponent();
       
       // Insert code required on object creation below this point.
      }

            protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
            {
                HitTestArgs args = this.Chart1.HitTest(e);
                base.OnMouseDown(e);
            }
     }
    }

    XAML:

    <Window
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:igCA="http://infragistics.com/Chart"
     x:Class="UntitledProject8.Window1"
     x:Name="Window"
     Title="Window1"
     Width="640" Height="480">

     <Grid x:Name="LayoutRoot">
      <igCA:XamChart Name="Chart1" Margin="8,8,8,8">
       <igCA:XamChart.Series>
        <igCA:Series>
         <igCA:Series.DataPoints>
          <igCA:DataPoint Value="2"/>
          <igCA:DataPoint Value="8"/>
          <igCA:DataPoint Value="6"/>
          <igCA:DataPoint Value="7"/>
         </igCA:Series.DataPoints>
        </igCA:Series>
       </igCA:XamChart.Series>
      </igCA:XamChart>
     </Grid>
    </Window>

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