When a scene graph contains multiple nested focused nodes (this can happen with `TableView` and other controls), the `focusWithin` bits that are cleared when a focused node is de-focused must only be cleared when there is no other nested node in the scene graph that would also cause `focusWithin` to be set.
For example, consider a scene graph of nested nodes: A -> B -> C -> D When B and D are both focused, the scene graph looks like this: A(`focusWithin`) -> B(`focused`, `focusWithin`) -> C(`focusWithin`) -> D(`focused`, `focusWithin`) When B is de-focused, the `focusWithin` flags must still be preserved because D remains focused. This PR fixes the issue by counting the number of times `focusWithin` has been "set", and only clears it when it has been "un-set" an equal number of times. ------------- Commit messages: - focusWithin fix - Failing test Changes: https://git.openjdk.org/jfx/pull/993/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=993&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8300013 Stats: 57 lines in 2 files changed: 53 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jfx/pull/993.diff Fetch: git fetch https://git.openjdk.org/jfx pull/993/head:pull/993 PR: https://git.openjdk.org/jfx/pull/993
