When the cellcount changes, we need to make sure that the size of the current first visible cell is known.
This avoids index errors due to the current offset (between the top of the viewport and the current first visible cell) being potentially larger than the new estimated cellsize. Added a test that fails before and succeeds after the patch. The test uses the same logic as the reproducer in the JBS issue. ------------- Commit messages: - When the cellcount changes, we need to make sure that the size of the current first visible cell is known. Changes: https://git.openjdk.org/jfx/pull/1164/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1164&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8311185 Stats: 19 lines in 2 files changed: 19 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/1164.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1164/head:pull/1164 PR: https://git.openjdk.org/jfx/pull/1164
