TrackBallBehavior on right click

[Daniel]

Hello, I am using SfChart with custom TrackBall ControlTemplate. I have to add additional values into the template which slows down the rendering process. The trackball is not always desired to be shown. How can I show the trackball only when the mouse right/middle button is clicked? Left click is already used for zooming/panning.

[Muneesh Kumar G]

Hi Daniel,  

  

Thanks for using Syncfusion products.  

 

We have analysed your requirement and you can achieve this by using PositionChanging event in ChartTrackBallBehavior and checking mouse state as per the below code snippet.  

 

Code snippet [XAML]: 

  <chart:SfChart.Behaviors> 

                <chart:ChartTrackBallBehavior PositionChanging="ChartTrackBallBehavior_PositionChanging" /> 

            </chart:SfChart.Behaviors> 

 

Code snippet [C#]: 

   private void ChartTrackBallBehavior_PositionChanging(object sender, PositionChangingEventArgs e) 

        { 

            if (Mouse.RightButton != MouseButtonState.Pressed) 

                e.Cancel = true; 

        } 

 

Please refer the below user documentation for more details.  

 

https://help.syncfusion.com/wpf/sfchart/interactive-features#events 

 

Please let us know if you have any queries.  

  

Thanks,  

Muneesh Kumar G. 

[Daniel]

Thank you, however, now when I stop holding the right button, the tooltip is still shown. How can I hide it afterwards?

[Muneesh Kumar G]

Hi Daniel,   

   

You can hide the trackball tooltip by calling internal ClearItems method in SfChart’s MouseRightButtonUp event as per the below code snippet.   

  

Code snippet [XAML]:  

     <chart:SfChart x:Name="chart" MouseRightButtonUp="Chart_MouseRightButtonUp"> 

 

            <chart:SfChart.Behaviors> 

                <chart:ChartTrackBallBehavior x:Name="behavior" PositionChanging="ChartTrackBallBehavior_PositionChanging" /> 

            </chart:SfChart.Behaviors> 

.. 

        </chart:SfChart> 

  

Code snippet [C#]:  

   private void Chart_MouseRightButtonUp(object sender, MouseButtonEventArgs e) 

        { 

            behavior.GetType().GetMethod("ClearItems", BindingFlags.NonPublic | BindingFlags.Instance).Invoke(behavior, null); 

 

        } 

  

Please let us know if you have any queries.   

   

Thanks,   

Muneesh Kumar G.  

 

[Daniel]

Hi Daniel,   

   

You can hide the trackball tooltip by calling internal ClearItems method in SfChart’s MouseRightButtonUp event as per the below code snippet.   

  

Code snippet [XAML]:  

     <chart:SfChart x:Name="chart" MouseRightButtonUp="Chart_MouseRightButtonUp"> 

 

            <chart:SfChart.Behaviors> 

                <chart:ChartTrackBallBehavior x:Name="behavior" PositionChanging="ChartTrackBallBehavior_PositionChanging" /> 

            </chart:SfChart.Behaviors> 

.. 

        </chart:SfChart> 

  

Code snippet [C#]:  

   private void Chart_MouseRightButtonUp(object sender, MouseButtonEventArgs e) 

        { 

            behavior.GetType().GetMethod("ClearItems", BindingFlags.NonPublic | BindingFlags.Instance).Invoke(behavior, null); 

 

        } 

  

Please let us know if you have any queries.   

   

Thanks,   

Muneesh Kumar G.  

 

Thank you, everything is working now.

[Muneesh Kumar G]

Hi Daniel, 

Thanks for the update.

We are glad to know that the given solution works. Please let us know if you need any further assistance.

Thanks,
Muneesh Kumar G.