** Changed in: evince
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/981248
Title:
Activate smooth scrolling in Evince [SRU]
Status in Evince document viewer:
Fix Released
Status in “evince” package in Ubuntu:
Fix Released
Status in “evince” source package in Precise:
Incomplete
Status in “evince” source package in Quantal:
Won't Fix
Bug description:
[Problem]
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.
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.
[Impact]
This bug affects all touchpad users in Precise. Touchscreen users may also be
affected.
[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.
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