The misbehavior happens if (super) startEdit didn't succeed (== !cell.isEditing):
- must not fire editStart event - must not update control's editing location fix is to back out of startEdit if super.startEdit doesn't switch the cell into editing mode Added tests that failed/passed before/after the fix. Note that for Tree-, Table-, TreeTableCell one of the added tests would be a false green due to those cells not updating the editing location on its control [JDK-8187474](https://bugs.openjdk.java.net/browse/JDK-8187474), so it's ignore until that's fixed. ------------- Commit messages: - 8274433: All Cells: misbehavior of startEdit Changes: https://git.openjdk.java.net/jfx/pull/636/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=636&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8274433 Stats: 107 lines in 8 files changed: 107 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jfx/pull/636.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/636/head:pull/636 PR: https://git.openjdk.java.net/jfx/pull/636