D25097: [Notifications KCM] Show hint if notifications aren't available or provided by someone else

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, VDG.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  I've seen people complaining about ugly notification popups when they were in fact running Dunst instead of Plasma.
  Since the KCM won't work with notifications other than Plasma's, this patch adds a hint informing the user when there is no notification widget or notifications are provided by another service than Plasma.
  Notification API provides a way to query server identity which is used to determine if it's Plasma or not. The process name isn't used as you could have a notifications widget in e.g. Latte Dock.

TEST PLAN
  Actually the notification service isn't running/registered but from a user's POV they might just not have a notification widget.
  F7703382: Screenshot_20191031_174724.png <https://phabricator.kde.org/F7703382>
  Service owned by someone else
  F7703383: Screenshot_20191031_174732.png <https://phabricator.kde.org/F7703383>

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D25097

AFFECTED FILES
  kcms/notifications/CMakeLists.txt
  kcms/notifications/kcm.cpp
  kcms/notifications/kcm.h
  kcms/notifications/package/contents/ui/main.qml

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