Dear ChimeraX team, I am experiencing the bug described below on Mac (Tahoe 26.6.) with ChimeraX version 1.12 (2026-06-12). When I open ChX, the wheel scroll works (bound to zoom function). Then, I perform a two-finger action on a touchpad and the wheel scroll is not registered in ChX anymore. Any recommendation on how to mitigate the loss of wheel function other than not to use the trackpad when ChX is open? Best, Jan ######################## Tom Goddard wrote:
Hi Dale,
I'm guessing your on a Mac and this has something to do with ChimeraX Mac multitouch trackpad support. There was a limitation in the Qt window toolkit where two finger drag on the touchpad produced scroll events even though ChimeraX was handling the two-finger drag to do a rotation. But the scroll events looked exactly like mouse scroll events, so if you really did a mouse scroll and you also use the trackpad then it just ignored the scroll event. I see this problem described in the ChimeraX 1.6 code here
https://github.com/RBVI/ChimeraX/blob/6e2f12a093d52c317a4f8aaa1070334dcfe6f5...
''' macOS generates mouse wheel events in response to a two-finger drag on trackpad. We discard those if we have multitouch trackpad support enabled so that 2-finger drag should be rotation. But we don't want to discard wheel events that come from a non-trackpad device. Unfortunately macOS and Qt5 provides no way to distinguish magic mouse scroll from a trackpad scroll, both are reported as synthesized events and there is no source device id available. If there are any trackpad devices and multitouch is enabled then the magic mouse wheel events are thrown away. This is ChimeraX bug #1474. We used to instead see if we recently received a touch event and in that case throw away any wheel event. Unfortunately on macOS we sometimes don't get touch events after clicking in the Log or other windows and then moving back to the graphics window, until the second multitouch drag is done. '''
The ChimeraX daily build and 1.7 release candidate changed this code using a newer Qt window toolkit capability to distinguish the two-finger drag from a mouse scroll wheel. Mouse scroll is working for me in those newer ChimeraX version and it does not work after I use a two finger rotation on the trackpad with ChimeraX 1.6. So use the newer ChimeraX.
Tom
On Nov 8, 2023, at 7:28 PM, Dale Calleja via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote: Hello, I am currently learning to use ChimeraX (v1.6.1) and I am having issues with my scroll wheel. I notice when I first open the software using the scroll wheel on my mouse will zoom in and out of the structure but, after some time it simply stops working and the scroll wheel does nothing. Is this a button I am accidentally pressing or have I discovered a bug? It doesn’t seem to have any pattern, I am just clicking around changing the display of my protein. Thanks! Dale. Dale Calleja PhD Student, Komander Lab Ubiquitin Signalling Division WEHI 1G Royal Parade Parkville VIC 3052 Australia Email calleja.d@wehi.edu.au <mailto:calleja.d@wehi.edu.au> Walter and Eliza Hall Institute of Medical Research 1G Royal Parade Parkville Victoria 3052 Australia www.wehi.edu.au <https://wehi.edu.au/> Twitter <https://twitter.com/WEHI_research> | Facebook <https://www.facebook.com/WEHIresearch/> | Instagram <https://www.instagram.com/wehi_research> | Youtube <https://www.youtube.com/user/WEHImovies> | LinkedIn <https://www.linkedin.com/company/wehi_research> WEHI acknowledges the Wurundjeri people of the Kulin Nation as the traditional owners of the land where our campuses are located and the continuing connection to country and community. Private and confidential The content of this e-mail and any attachments may be private and confidential, intended only for use of the individual or entity named. If you are not the intended recipient of this message you must not read, forward, print, copy, disclose, use or store in any way the information this e-mail or any attachment contains. If you are not the intended recipient, please notify the sender immediately and delete or destroy all copies of this e-mail and any attachment. _______________________________________________ ChimeraX-users mailing list -- chimerax-users@cgl.ucsf.edu <mailto:chimerax-users@cgl.ucsf.edu> To unsubscribe send an email to chimerax-users-leave@cgl.ucsf.edu <mailto:chimerax-users-leave@cgl.ucsf.edu> Archives: https://mail.cgl.ucsf.edu/mailman/archives/list/chimerax-users@cgl.ucsf.edu/
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