GNOME Bugzilla – Bug 775775
Two-finger scroll / pan (vertical or horizontal) not working
Last modified: 2021-06-19 08:46:43 UTC
I am using eog 3.20.5 on wayland, and I can zoom with pinch-to-zoom (very neat, by the way), however, once I zoomed in, I cannot "pan" (or scroll?) vertically nor horizontally by using two-finger gestures (I also tried with three-finger gestures). I thought this may be a duplicate of https://bugzilla.gnome.org/show_bug.cgi?id=748952 but that had been fixed, so I am opening this new bug.
Can you check whether holding CTRL during the scroll gesture makes a difference? Two-finger-scroll is probably not generating mouse wheel events on multitouch as it did on old/classic touchpads. Which would mean we'd need to recognize some sort of drag gesture.
For me holding CTRL during scrolling on the Touchpad does not make a difference, still nothing happens.
*** Bug 777920 has been marked as a duplicate of this bug. ***
It generates GdkEventScroll with a direction of GDK_SCROLL_SMOOTH. Looks like eog-scroll-view doesn't handle that -- I'd try patch it, but gave up when the build system kept shouting at me about various broken/missing things. I would suggest that smooth scroll events should probably be handled by scrolling - not zooming - as it will feel like a much more natural interaction that way, and unlike a regular scroll event, both axes are delivered at once.
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