RFR: 8187229: Tree/TableCell: cancel event must return correct editing location [v2]

[Ajit Ghaisas]

On Mon, 5 Jul 2021 10:18:15 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

>> the bug is an incorrect edit location (for Tree/Table: Tree/TablePosition) in edit cancel events - expected is the location at the time the cell edit was started, actual was the location of at the time the edit was cancelled. See the report for details.
>> 
>> The fix is analogue to those for ListCell/TreeCell, that is storing the edit location in startEdit and use that in cancelEdit.
>> 
>> Added tests that failed before and passed after and tests that (accidentally :) passed before and still pass after.
>> 
>> Related issues:
>> 
>> - also fixes [JDK-8269136](https://bugs.openjdk.java.net/browse/JDK-8269136) (Tree/TablePosition: must not throw NPE on instantiating with null table), in hind-sight it seemed too small to warrant its own PR. 
>> - does not fix the implementation of CellEditEvent (todo: file follow-up issue) which must not throw with null Tree/TablePosition.
>
> Jeanette Winzenburg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   test cleanup as per review comments

Marked as reviewed by aghaisas (Reviewer).

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

PR: https://git.openjdk.java.net/jfx/pull/561