I’ve learned that the Retainer Box widget allows you to interact with other widgets like sliders and buttons in the Designer view without having to enter PIE or standalone. This is very useful for quickly iterating on different slate brush designs for widgets like the Combo Box or Sliders with custom materials. There are definitely some limitations such as being able to hover and click a button widget but be unable to trigger any OnClick or OnHover events. This is in 5.3.
I understand that the Retainer Box is used for optimizing widgets by being able to tweak the render phases to run at different times as well as being able to apply a material effect to it’s children.
What I would like to know is why it allows you to click/hover interactable widgets in the Designer view but has limited functionality when it comes to triggering events?
Hierarchy:
No Hover:
Hover:
