128188 - Ugly jiggle of message pane when deleting messages; outliner scrolling issue

Status: RESOLVED WONTFIX

(Core :: XUL, defect)

Description

[Simon Fraser [no longer active]]

On Mac, if you delete the last message in a mail folder, and the message pane in
mailnews is scrolled such that there is a bit of space at the bottom, under the
last, selected message, then deleting that message will cause an ugly
double-scroll effect in the message pane.

To repro:
1. Load a mail folder with a sacrificial message at the bottom, and enough
messages so that things scroll.
2. Scroll to the bottom, and select the last message
3. If necessary, drag the splitter between the thread and message panes so that
there is some white space under that last message.
4. Hit the delete key.

Observer how the selected row seems to jump down by the row height, and then
jump up again.

What actually happens is that on deletion, outliner scrolls everything down by
the row height, but with the deleted, selected message still visible. So the
user sees the selected message move down. Then things are redrawn, showing that
actually, the previous message is selected (so the selection bar appears to jump
up again).

This bug is Mac-only, so it might be something to do with scrolling causing
synchronous updates on Mac.

Comment 1

[(not reading, please use [e-mail] instead)]

as simon notes, I don't see this on win2k, but I do see it on mac, modern skin 
(I don't think that matters)

I haven't tried linux.

Comment 2

[Simon Paquet [:sipaq]]

This bug is targeted at a Mac classic platform/OS, which is no longer supported
by mozilla.org. Please re-target it to another platform/OS if this bug applies
there as well or resolve this bug.

I will resolve this bug as WONTFIX in four weeks if no action has been taken.
To filter this and similar messages out, please filter for "mac_cla_reorg".

Comment 3

[Simon Fraser [no longer active]]

OS 9 is dead