Bug 431668

Summary:	Icons-Only Task Manager centered using panel spacers flickers when system tray displays a new entry
Product:	[Plasma] plasmashell	Reporter:	Felipe Kinoshita <kinofhek>
Component:	Panel	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED FIXED
Severity:	minor	CC:	monorail_unadorned989, nate, plasma-bugs
Priority:	NOR
Version:	5.20.5
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:	https://invent.kde.org/plasma/plasma-workspace/commit/b382f61c914072732cabd9b5ae0d6e7b12fc20a9	Version Fixed In:	5.24.2
Sentry Crash Report:

Description Felipe Kinoshita 2021-01-16 00:16:35 UTC

I centralized the Icons-Only Task Manager with two flexible spacers, when a system tray's "Show when relevant" entry is shown, it flickers

STEPS TO REPRODUCE
1. put two flexible size spacer around the Icons-Only Task Manager
2. set some system tray's entry to "Show when relevant"
3. activate the entry, e.g. if the clipboard entry is currently hidden, copy some text so it activates 

OBSERVED RESULT
Icons-Only Task Manager flickers when hidden entry is shown

EXPECTED RESULT
Icons-Only Task Manager should not be affected

SOFTWARE/OS VERSIONS
Linux: Fedora KDE 33
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

Comment 1 Bug Janitor Service 2022-02-15 19:51:19 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/1464

Comment 2 Nate Graham 2022-02-21 16:58:06 UTC

Git commit 5824e6362008988f74d07c9fce930e93294b990d by Nate Graham, on behalf of Martin Seher.
Committed on 21/02/2022 at 16:58.
Pushed by ngraham into branch 'master'.

applets/panelspacer: Fix optimal size calculation

Get rid of the delayed optimal size calculation caused by Qt.callLater
and calculate optimal size immediately when an applet's size changes.
This removes the unnecessary jumping of applets that are centered between 2
spacers.
FIXED-IN: 5.24.2

M  +8    -22   applets/panelspacer/package/contents/ui/main.qml

https://invent.kde.org/plasma/plasma-workspace/commit/5824e6362008988f74d07c9fce930e93294b990d

Comment 3 Nate Graham 2022-02-21 17:00:37 UTC

Git commit b382f61c914072732cabd9b5ae0d6e7b12fc20a9 by Nate Graham, on behalf of Martin Seher.
Committed on 21/02/2022 at 17:00.
Pushed by ngraham into branch 'Plasma/5.24'.

applets/panelspacer: Fix optimal size calculation

Get rid of the delayed optimal size calculation caused by Qt.callLater
and calculate optimal size immediately when an applet's size changes.
This removes the unnecessary jumping of applets that are centered between 2
spacers.
FIXED-IN: 5.24.2


(cherry picked from commit 5824e6362008988f74d07c9fce930e93294b990d)

M  +8    -22   applets/panelspacer/package/contents/ui/main.qml

https://invent.kde.org/plasma/plasma-workspace/commit/b382f61c914072732cabd9b5ae0d6e7b12fc20a9