Review Request 123621: Fix reverse scroll setting in Mouse KCM

[Yue Liu]

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https://git.reviewboard.kde.org/r/123621/
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Review request for Plasma.


Repository: plasma-desktop


Description
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The old swap-button-map method for reverse scroll doesn't work for Qt5, this patch uses XInput2 api to negate "Evdev Scroll Distance" for device with real scroll wheel, and swap "Evdev Wheel Emulation Axes" when device uses emulated scroll wheel, such as Thinkpad Trackpoint.


Diffs
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  kcms/input/CMakeLists.txt 6cbe207 
  kcms/input/mouse.cpp 1450de8 

Diff: https://git.reviewboard.kde.org/r/123621/diff/


Testing
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built on archlinux and tested by replacing kcm_input.so, new kcm works on my machine.


Thanks,

Yue Liu

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