RFR: 8253634: TreeCell/Skin: misbehavior on switching skin

[Ambarish Rapte]

On Fri, 25 Sep 2020 11:10:20 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

> TreeCellSkin installs listeners to the TreeView/fixedCellSize that introduce a memory leak, NPE on replacing the treeView and incorrect update of internal state.
> 
> Fixed by removing the listeners (and the internal state had been copied from treeView on change) and access of listView state when needed.
> 
> Added tests that failed before and pass after the fix, plus a sanity test to guarantee same (correct) behavior before/after.
> 
> Issue and fix is basically the same as for ListCellSkin [JDK-8246745](https://bugs.openjdk.java.net/browse/JDK-8246745)

As @kleopatra has already mentioned it that Issue and fix is basically the same as for ListCellSkin [JDK-8246745](https://bugs.openjdk.java.net/browse/JDK-8246745).
It looks good...

-------------

Marked as reviewed by arapte (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/309