Is it possible to have a callback on a child element override a callback on a parent element?

Unity Engine
,
1
  • I have a parent VisualElement, “Parent”, that when clicked, hits a callback
  • I have a child VisualElement of “Parent”, “Child”, that when clicked, hits a callback

Is it possible to not trigger the parent VisualElement callback, when the specific “Child” is clicked (even though it is nested in the parent)?

2

Have you tried calling StopPropagation() on the event in the child callback? That should be enough to prevent the event from reaching the parent.

2 Likes
3

I will try this out thank you!

4

I tried this and received an error: The name “StopPropagation” does not exist in the current context

5

On what object are you trying to call StopPropagation() on? You have to do it on the event received on the callback. If you register a callback for ClickEvent for example, you’d do this:

// Callback registration
parent.RegisterCallback<ClickEvent>(ParentCallback);
child.RegisterCallback<ClickEvent>(ChildCallback);

// Callback definitions
void ParentCallback(ClickEvent evt)
{
   Debug.Log("Parent Callback called");
}

void ChildCallback(ClickEvent evt)
{
   Debug.Log("Child Callback called");
   // Remove this next line and the Parent Callback will be called:
   evt.StopPropagation();
}
6

This worked thank yoU!

1 Like