GNOME Bugzilla – Bug 777920
Ctrl + two finger zooming not working
Last modified: 2017-02-15 18:55:07 UTC
Description of problem: Ctrl + two finger scrolling on touchpad does not enable zoom in /zoom out function in eye of gnome. This is not a consistent behaviour in comparison to other programs and therefore I think it should be addressed. Version-Release number of selected component (if applicable): 3.20.5 How reproducible: Steps to Reproduce: 1. Open a picture with eye of gnome 2. try to zoom with Crtl + two finger scrolling on touchpad 3. nothing happens Actual results: nothing happens. Expected results: like in other programs, I'd expext it to be possible to zoom in / out this way.
Which other programs support this, to have a comparison?
Gnome Files, Gnome Maps, Firefox, Libreoffice, GIMP for example.
eog traditionally zooms using the mousewheel alone. Adding CTRL to the mix switches to scrolling. Since (I assume you don't mean the pinch gesture) two-finger scrolling just produces mouse wheel events the behaviour is identical. If you like it the other way around there's a dconf option: /org/gnome/eog/view/scroll-wheel-zoom. Set it to FALSE and it will behave as you describe.
Ok I now understand how the UI of eog should to work. Still, there is a bug. When I use two fingers on the touchpad in eog while the mouse pointer is on the picture, nothing happens at all - neither zooming nor scrolling. Tried it with a mouse and everything works just like you explained. The pinch gesture on the touchpad works though. If that helps: I experienced the same problem in shotwell too (https://bugzilla.redhat.com/show_bug.cgi?id=1417218)
I think that's a different story. The two-finger scroll in "classic" touchpads worked by emitting the same events a mouse wheel would emit. I am not sure whether multitouch capable input works the same or requires recognizing that specific gesture.
*** This bug has been marked as a duplicate of bug 775775 ***