D26966: [kstyle] Use guarded pointers to store shadows

[Kai Uwe Broulik]

broulik added inline comments.

INLINE COMMENTS

> apol wrote in breezeshadowhelper.h:157
> if this is a thing, maybe it would make sense to actually try and remove the KWindowShadows upon destruction?
> Something like `connect(newshadow, &QObject::destroyed,  this, [this, widget] { _shadows.remove(widget); });`

We have a connection to `destroyed` for the `widget` which isn't reached when a window is destroyed on `QApplication` teardown, so I think the same might be true for the window, I would still prefer this over a `QPointer`.

REPOSITORY
  R31 Breeze

REVISION DETAIL
  https://phabricator.kde.org/D26966

To: zzag, #plasma, broulik
Cc: apol, plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, jraleigh, zachus, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, ahiemstra, mart
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