D20766: Use appropriate background color for text previews

[Eugene Shalygin]

eshalygin created this revision.
Herald added projects: Dolphin, Frameworks.
Herald added subscribers: kfm-devel, kde-frameworks-devel.
eshalygin requested review of this revision.

REVISION SUMMARY
  Text previews are unreadable (in fact look empty) with dark colour schemes because of the hard-coded background color.
  
  https://bugs.kde.org/show_bug.cgi?id=406404
  https://bugs.kde.org/show_bug.cgi?id=406745

REPOSITORY
  R320 KIO Extras

REVISION DETAIL
  https://phabricator.kde.org/D20766

AFFECTED FILES
  thumbnail/CMakeLists.txt
  thumbnail/textcreator.cpp

To: eshalygin
Cc: kde-frameworks-devel, kfm-devel, alexde, feverfew, meven, michaelh, spoorun, navarromorales, firef, ngraham, andrebarros, bruns, emmanuelp, mikesomov
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