How to Change Cursor to Block Cursor When Hovering in WPF SfDiagram?

In the WPF Diagram, you can change the cursor to a block cursor when hovering over symbols in a disabled state by using the MouseMove event of the Stencil. In this event, utilize the HitTest method to identify the stencil element currently under the mouse pointer. Based on whether the element is enabled or disabled, you can then change the cursor accordingly. Here is a code example to show how to achieve this:

Code Snippet:

stencil.MouseMove += Stencil_MouseMove;


 private void Stencil_MouseMove(object sender, MouseEventArgs e)
 {
     var position = e.GetPosition(stencil);
     var hitElement = GetElementAtPosition(position);
     if (hitElement != null)
     {
         if (hitElement.IsEnabled == false)
         {
             Mouse.OverrideCursor = Cursors.No;
         }
         else
         {
             Mouse.OverrideCursor = null;
         }
     }
 }


/// <summary>
/// Method for getting the stencil element from the mouse pointer
/// </summary>

private FrameworkElement GetElementAtPosition(Point position)
{
    // Perform hit testing on the stencil. It gets the topmost element from the mouse position
    HitTestResult result = VisualTreeHelper.HitTest(stencil, position)

    if (result != null && result.VisualHit is FrameworkElement hitElement)
    {
        return hitElement; // Return the topmost FrameworkElement
    }

    return null; // Return null if no element is found
} 

Conclusion
I hope you enjoyed learning about how to change cursor to block cursor when hovering in WPF SfDiagram.

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