uSim Scan Scan Control cannot stop rotating the scan

[icbicket]

When I try to use the scan rotation in the "uSim Scan Scan Control" panel by clicking on the double-headed arrow next to the text entry box, I cannot escape this function. Moving the mouse rotates the scan, which is fine, but I cannot stop the rotation - I've tried pressing various keyboard keys (such as Esc., Enter), and the mouse buttons, but nothing lets me escape the rotation and regain control of the mouse to use other functions in the software. The only way I've been able to escape the scan rotation operation is by going to my System Monitor and killing nionswift and restarting it. I haven't been able to locate any documentation on escaping it, or locate the relevant code for this function yet to see what's happening.

This happens with both the nionswift dev version and the release version (nionswift 0.15.4, usim 0.3.0), installed in a Python 3.8 venv on Linux Mint.

[cmeyer]

This is also reported here: nion-software/nionswift#224

The relevant code is here: https://github.com/nion-software/nionui/blob/master/nion/ui/MouseTrackingCanvasItem.py

[icbicket]

I didn't see that issue, thanks for the pointer. I suppose I can confirm, then, that this issue also affects Linux machines as well as Windows.