D6763: Fix app icon button in window decos with high DPI in previews.

[David Edmundson]

davidedmundson created this revision.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  With both Qt devicePixelRatio > 1 and Qt::AA_UseHighDpiPixmaps set
  QIcon.pixmap() will return a bigger image than the size requested, with
  the relevant devicePixelRatio set.
  
  This code is trying to center an icon within a bounding rect, (like
  QStyle::drawItemPixmap) and so positioning should use normalised pixels,
  not actual pixmap pixels.
  
  This affected Systemsettings previews but not kwin.

REPOSITORY
  R31 Breeze

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D6763

AFFECTED FILES
  kdecoration/breezebutton.cpp

To: davidedmundson, #plasma
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/plasma-devel/attachments/20170717/14e08d99/attachment-0001.html>