JavaFX has two closely related focus concepts: `Node.focused`, which can apply to any number of nodes in a scene graph, and `Scene.focusOwner`, which is the single node in a scene graph that accepts user input.
JavaFX 19 added `Node.focusWithin`, which is a flag set on any node that contains a `focused` node. However, there is no flag on `Node` for the single focus owner, and also no flag that is set if a node contains the single focus owner. Tickets like [0] show that there might be a need for these additional flags. One could argue that it might not be the best idea to set the `focused` flag on a node that is not the focus owner (TableView does this quite a lot), but I think that ship has sailed. I've prepared a draft PR [1] that shows the proposed API of this enhancement. The functionality can in theory be implemented by applications, since the `Scene.focusOwner` property is already available, but this is far from easy (especially when CSS is involved). I'm interested in your thoughts on whether this is an API that we want to have in JavaFX. [0] https://bugs.openjdk.org/browse/JDK-8317426 [1] https://github.com/openjdk/jfx/pull/1255
