https://bugs.kde.org/show_bug.cgi?id=436232
Bug ID: 436232
Summary: Touch controls for the viewport causes jitteriness and
unexpected panning when horizontally distant from
center of canvas.
Product: krita
Version: 4.4.3
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: * Unknown
Assignee: krita-bugs-n...@kde.org
Reporter: seagoatworkshol...@gmail.com
Target Milestone: ---
SUMMARY
When using the touchscreen to pan and rotate the viewport of the document when
the viewport is panned horizontally offset from the center, the document would
unexpectedly jitter and pan vertically.
STEPS TO REPRODUCE
1. Make a new document with pixel dimensions of at least 16000x8000. Make some
lines or a grid to make sure you have a reference.
2. Pan the document to either the very left or the very right side of the
screen.
3. Rotate the canvas side to side from zero degrees using the touch screen
controls. This is done using two fingers and pivoting them around like a valve
or a wheel.
OBSERVED RESULT
The document would pan up or down on its own even if the fingers are not
attempting to pan up or down. The effect becomes more extreme when zoomed in
and further away horizontally from the center.
EXPECTED RESULT
The canvas would rotate properly without feeling as if was slipping out of your
control.
SOFTWARE/OS VERSIONS
Windows: Windows 10
Qt Version: 5.12.9
ADDITIONAL INFORMATION
Krita window is fullscreen at a resolution of 3840x2160. DPI is 150%.
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