https://bugs.kde.org/show_bug.cgi?id=500647
Bug ID: 500647
Summary: Mouse sometimes snaps back in Blender when rotating
view
Classification: Plasma
Product: kwin
Version: 6.3.0
Platform: Debian unstable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: input
Assignee: kwin-bugs-n...@kde.org
Reporter: koczog...@gmail.com
CC: duha.b...@gmail.com
Target Milestone: ---
SUMMARY
The mouse pointer sometimes snaps backwards when rotating the camera in Blender
using the middle mouse button.
The issue only seems to occur if the mouse is still moving when the middle
mouse button is released. If the mouse is stopped before the button is
released, the cursor doesn't snap back. Note that it doesn't always snap back
to its original location, but rather it appears to be going in a straight line
*towards* the original location. It sometimes falls short, or goes past that
point.
STEPS TO REPRODUCE
1. Open Blender 4.3.2
2. Click and hold middle mouse button in the viewport
3. Drag mouse to rotate the camera
4. While dragging the mouse, let go of the middle mouse button
OBSERVED RESULT
The mouse cursor snaps back to the location, or near to the location it was
when the middle mouse button was pressed, instead of staying where the cursor
was when the button was released.
EXPECTED RESULT
The mouse cursor should stay where it was when the middle mouse button was
released.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian Sid
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.11.0
Qt Version: 6.7.2
ADDITIONAL INFORMATION
I'm not exactly sure what triggers this bug. In one Blender session I was able
to reproduce it nearly every time using the above method. In other sessions it
may take 30-40 attempts to get it to snap back once. The direction the mouse is
moving doesn't appear to be a factor. Blender is running in a native Wayland
window.
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