(In reply to Olli Pettay [:smaug] from comment #113) > (In reply to Masayuki Nakano [:masayuki] (JST, +0900) from comment #112) > > Anyway, I don't think that we should use this feature when the user's device > > is obviously non-legacy pointing device, i.e., it supports diagonal scroll. > > What do you think? > But this is enabled on touchpads too, if the pref is set. Could we somehow > enable it on mouse input only, and not touchpad?
Unfortunately, on any platforms, we cannot check if mouse scroll event came from what kind of device. There are some options: 1. Take current approach -- treat "pure" vertical wheel operation as horizontal scroll and 1-1. Handle deltaX as is (current approach). 1-2. Handle deltaX as vertical scroll (I don't like this and incompatible with Chrome). 1-3. Ignore deltaX, so, if only deltaX is non-zero, does nothing. 2. Treat any vertical wheel operation as horizontal scroll (even if it's diagonal operation) and/but 2-1. Handle deltaX as vertical scroll (same as 1-2). 2-2. Ignore deltaX (same as 1-3). If user operates wheel diagonally but native events come separately, it might be the best to ignore deltaX. E.g., we can avoid performing 2 default actions (e.g., both horizontal scroll and navigating history), but this means that the default action will always be ignored if it matches with new pref's modifier. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1228250 Title: [Shift + Mouse-Scroll-Wheel] Does NOT Scroll Horizontally To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1228250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
