D11533: [kstyle] create shadow tiles more explicitly

[Vlad Zagorodniy]

zzag created this revision.
zzag added reviewers: Breeze, hpereiradacosta.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
zzag requested review of this revision.

REVISION SUMMARY
  With this changes it's more clear where shadow tiles are created, also it
  fixes one possible bug. For example, right now, there are two shady actors
  who trigger creation of the shadow tiles:
  
  - the first one lays inside of Style::loadConfiguration(). It creates
  
  shadow tiles as a side effect of configuration of _mdiWindowShadowFactory
  
  - the second one lays inside of ShadowHelper::createPixmapHandles()
  
  Please note, ShadowHelper::createPixmapHandles() is invoked only for X11 not Wayland!

REPOSITORY
  R31 Breeze

BRANCH
  shadows

REVISION DETAIL
  https://phabricator.kde.org/D11533

AFFECTED FILES
  kstyle/breezeshadowhelper.cpp

To: zzag, #breeze, hpereiradacosta
Cc: plasma-devel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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