Review Request 123468: Add setting to adjust screen scaling

[David Edmundson]

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https://git.reviewboard.kde.org/r/123468/
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Review request for Plasma.


Repository: kscreen


Description
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Single dialog alters both QT_DEVICE_PIXEL_RAITO and XRDB.DPI text
scaling factor that used to reside in fonts KCM.

A preview widget shows how this will look on the that monitor.

Changes take affect after logout/login; not ideal but we're limited by
the Qt QPA for now. Will try and fix that after.

edit: having uploaded this I can see I have some whitespace left, please don't feel the need to tell me.


Diffs
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  kcm/src/previewwidget.h PRE-CREATION 
  kcm/src/CMakeLists.txt 50bfdf037c331fe7c6763fb85c3b43857cbea5d5 
  CMakeLists.txt e157a5e28e441a2e6dacb2d639cf6d120fb18c26 
  kcm/src/previewwidget.cpp PRE-CREATION 
  kcm/src/scaling.ui PRE-CREATION 
  kcm/src/scalingconfig.h PRE-CREATION 
  kcm/src/scalingconfig.cpp PRE-CREATION 
  kcm/src/stylepreview.ui PRE-CREATION 
  kcm/src/widget.cpp 7fe96c1c8b21b19424ef4993dff9eb3985bcefdb 

Diff: https://git.reviewboard.kde.org/r/123468/diff/


Testing
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Thanks,

David Edmundson

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