Bug 574150

Summary:

[macOS11] Table: vertical scrollbar is not initialized correctly

Product:

[Eclipse Project] Platform

Reporter:

Thomas Singer <ts-swt>

Component:

SWT

Assignee:

Platform-SWT-Inbox <platform-swt-inbox>

Status:

NEW ---

QA Contact:

Severity:

major

Priority:

CC:

alexandr.miloslavskiy, ts-swt

Version:

4.21

Target Milestone:

---

Hardware:

OS:

Mac OS X

Whiteboard:

Attachments:

Description	Flags
Snippet to reproduce	none
Screenshot from macOS 11.4	none
Screenshot on macOS 10.14	none
Screenshot on Windows 10	none

Description Thomas Singer

2021-06-11 04:28:54 EDT

Please use the attached snippet. It simulates loading of table items from a slow database triggered by scrolling. Initially, it should show 5 items, 50 items get added after 1s and on each scroll downwards below 75% of the scrollbar position. This works fine on Windows or macOS 10.14, but not on macOS 11. On the latter, the scrollbar reports its default value for the maximum independent of the table content.

Comment 1 Thomas Singer

2021-06-11 04:30:02 EDT

Created attachment 286568 [details]
Snippet to reproduce

Comment 2 Thomas Singer

2021-06-11 04:31:09 EDT

Created attachment 286569 [details]
Screenshot from macOS 11.4

Comment 3 Thomas Singer

2021-06-11 04:39:38 EDT

Created attachment 286570 [details]
Screenshot on macOS 10.14

Comment 4 Thomas Singer

2021-06-11 04:40:37 EDT

Created attachment 286571 [details]
Screenshot on Windows 10

Comment 5 Thomas Singer

2021-06-11 05:04:35 EDT

An SWT.Selection listener to the vertical scrollbar of the Table is not called on MacOS at all.