Popup fields and callbacks not working?

I'm having problems with RegisterCallback on PopupFields instantiated by PropertyFields.

Context:

• Custom editor (not a drawer or window)
• PropertyField created in UXML or C# (have tried both)
• Want to show/hide fields when value of PopupField changes (see GIF below)
• Polling with Schedule is a working fallback for my use case, but I'd prefer an event-driven approach.

Symptoms:

• Originally was unable to get reference to the PopupField (I believe I've resolved this though)
  • Solved: Wait until next frame to get PropertyField / PopupField and RegisterCallback
    • Per this post from antoine-unity: "...some specialied elements like Listview and PropertyField may create their hierarchy after one frame."
    • ^ That really seems like something that should be better documented.
    • Deferring get and register to a scheduled method call or AttachToPanelEvent both seem to work.

• ChangeEvent<myEnumType> does not work at all
  • My expectation is it would trigger after making a selection from the dropdown menu.
  • I've only ever gotten it to work with a Vector3Field, actually. Although admittedly I have not tested it extensively (e.g. with floats, integers, text fields, etc).

• MouseUpEvent works, but is peculiar. Clicking the label triggers it. But clicking on the menu only works if I use the right mouse button.
  • Possibly because Unity is internally eating the Mouse event? Per this post by UnityMat: "Button classes uses a Clickable manipulator internally which eats the MouseDown event and prevents its propagation." I tried the solution he shared, however, and it did not make a difference.

Here's the component I'm building. It's a simple tween interface. I hide the "From" and "To" parameters, depending on the Mode of the tween, which is selected from a dropdown menu. The implementation captured here is built with scheduling, but as stated above, I'd prefer to use events, if possible.

 

(Sorry for the slow response; was pulled away from this for the past week. Thank you for your response!)

Unfortunately neither

ChangeEvent<Enum>

nor

TrickleDown.TrickleDown

seem to make a difference.

On a positive note I have successfully gotten ChangeEvent to work for...

1) ObjectField instantiated via PropertyField (UXML)
2)

PopupField<string>

instantiated via

new PopupField

, built from

List<string>

(C#)

Narrowing down the problem: it appears to be enums specifically that are not working with PopupField ChangeEvent callbacks...

 

FWIW, when I inspect the PropertyField using UI Debugger, it contains a PopupField—not an EnumField.

 

Have you tried ChangeEvent<string> for yout PopupField?

 

WTF. That works. Why does that work?

I've been watching True Detective Season 1 again lately. So this moment popped in my head. Don't know how you thought of it, but thanks very much for the suggestion. I'm gonna go strip out a bunch of Schedules now

 

He he glad it helped .

I was actually struggling with similar issue in my project.

Studding the reference sources helped, as you can see Enum field types in PropertyField are implemented as PopupField<string>

https://github.com/Unity-Technologi...ono/UIElements/Controls/PropertyField.cs#L307