Review Request 119001: Add support for high-precision touchpad scrolling

[Kai Uwe Broulik]

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https://git.reviewboard.kde.org/r/119001/
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Review request for Dolphin.


Repository: kde-baseapps


Description
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This adds support for QWheelEvent's pixelDelta() which reports pixel-precise scrolling, mainly on touchpads. Since Qt 5.3 this is supported on X11 using XInput2, breaking Dolphin's custom scrolling on those devices.


Diffs
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  dolphin/src/kitemviews/kitemlistcontainer.cpp 39e6296 

Diff: https://git.reviewboard.kde.org/r/119001/diff/


Testing
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Tested both vertical and horizontal scrolling using both mouse and touchpad.

For some reason, although it returns a QPoint with x() and y() values, only y() is ever populated on my machine, even when doing horizontal touchpad gestures. Someone with a horizontally scrollable mousewheel might want to give this a try. I encountered this problem also in QtQuick, so might be a X11 QPA limitation.


Thanks,

Kai Uwe Broulik

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