[Panel Containment] Explicitly bind visible on both the container and the applet

Authored by broulik on Dec 31 2016, 10:22 PM.



While trying to fix a random plasmashell crash I was getting fairly often (and I hoped was fixed by David's last spacer fix) I found that the cause was actually in virtual desktop pager.

The virtual desktop pager is hidden when there's just one desktop and it will not update its models in this case to save resources. Back when I added this I already noticed that sometimes the pager (usually after one "open and close panelcontroller" cycle) still thought it was visible. It was even weirder than that, I found out that on teardown it suddenly thought it became visible. This had it populate its model which in turn spawned QML items, all of this whilst the panel was already in the process of destroying its children, leading to a crash.

Test Plan

Previously I could easily reproduce the crash:
start plasmashell
open panel controller
quickly open krunner and type kquitapp plasmashell

No more, gosh, this was a weird one. Also verified that virtual desktop pager "enabled" property stays consistent.

Diff Detail

R119 Plasma Desktop
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broulik updated this revision to Diff 9570.Dec 31 2016, 10:22 PM
broulik retitled this revision from to [Panel Containment] Explicitly bind visible on both the container and the applet.
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hein accepted this revision.Jan 2 2017, 8:05 AM
hein added a reviewer: hein.
This revision is now accepted and ready to land.Jan 2 2017, 8:05 AM
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