ExecuteDefaultActionAtTarget not getting MouseDown/Up events, but RegisterCallback<> works?

I've overriden ExecuteDefaultActionAtTarget on a custom control. Instances of the VisualElement receive MouseEnter/Leave events but not MouseDown/Up events. Registering for the callbacks directly works just fine. Why aren't they passed to ExecuteDefaultActionAtTarget?

Code (CSharp):

1. protected override void ExecuteDefaultActionAtTarget(EventBase evt)
2. {
3.    base.ExecuteDefaultActionAtTarget(evt);
4.  
5.    // This works
6.    if (evt.eventTypeId == AttachToPanelEvent.TypeId())
7.    {
8.        RegisterCallback<MouseDownEvent>(OnMouseDown);
9.    }
10.  
11.    // This doesn't
12.    if (evt.eventTypeId == MouseDownEvent.TypeId())
13.    {
14.        OnMouseDown((MouseDownEvent)evt);
15.    }

 

Note I just starting browsing UITookit source and noticed they recently added the `EventInterest` attribute, so I upgraded and annotated the method with `[EventInterest(typeof(AttachToPanelEvent), typeof(MouseDownEvent))]`, but that didn't get the MouseDownEvents to show up.

 

Never mind, I think I figured it out. The custom control I created has two child elements that fill it's entire space. I guess I need to register for events so I can handle them during the trickle down phase. At the moment I do get MouseDown events but only on the border of the container VisualElement.

 

You can specify picking mode for your children.

Code (CSharp):

1. circle = new VisualElement();
2. circle.pickingMode = PickingMode.Ignore;

 

I have the same problem, is there any progress on this issue