** Description changed: [Problem] - <1-2 sentence summary of the issue> - - [Impact] - <fill me in with explanation of severity and frequency of bug on users and justification for backporting the fix to the stable release> - - [Development Fix] - <fill me in with an explanation of how the bug has been addressed in the development branch, including the relevant version numbers of packages modified in order to implement the fix. > - - [Stable Fix] - <fill me in by pointing out a minimal patch applicable to the stable version of the package.> - - [Text Case] - <fill me in with detailed *instructions* on how to reproduce the bug. This will be used by people later on to verify the updated package fixes the problem.> - 1. - 2. - 3. - Broken Behavior: - Fixed Behavior: - - [Regression Potential] - <fill me in with a discussion of likelihood and potential severity of regressions and how users could get inadvertently affected.> - - [Original Report] - - affects ubuntu/evince - status confirmed - subscribe ubuntu-sponsors - Gtk+ 3.3.18 introduced smooth scrolling via the GDK_SCROLL_SMOOTH event, which is activated by default for most widgets, but opt-in for custom widgets that handle scroll events themselves. - Attached is a patch and the corresponding debdiff for activating this smooth - scrolling support for Evince's document view, complete with smooth zooming via - Ctrl+scroll. + Evince's document view is a custom widget that does not have + GDK_SMOOTH_SCROLL_MASK in its enabled events mask, and as such does not + benefit from this. This results in a rather jarring behaviour in + scrolling experience from the rest of the Gtk3 applications using + GtkScrolledWindow, and also from the scrolling experience in the + thumbnail view. - The debdiff is targeted against precise-proposed. + [Impact] + This bug affects all touchpad users in Precise. Touchscreen users may also be affected. - -- - Kind regards, - Loong Jin + [Development Fix] + Not fixed. + + [Stable Fix] + Upstream patch is currently under review in the upstream bugtracker. Once that patch is accepted, I will update the debdiff. + + [Text Case] + 1. Open a multipage document in Evince + 2. Open the thumbnail view + 3. Scroll in the thumbnail view using a touchpad's scroll implementation (circular, side scrolling, or two finger scrolling) + 4. Notice that the scrolling is smooth, without the jerky behaviour present in Gtk2 applications and applications in previous Ubuntu releases. + 5. Repeat #3 in the document view + 6. Notice that scrolling is jerky, like the behaviour in previous releases. + + [Regression Potential] + There isn't much regression potential, as the codepath for smooth scrolling in GtkScrolledWindow has already been activated by default for all Gtk3 applications and is well tested in Precise.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to evince in Ubuntu. https://bugs.launchpad.net/bugs/981248 Title: Activate smooth scrolling in Evince [SRU] To manage notifications about this bug go to: https://bugs.launchpad.net/evince/+bug/981248/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
