The workspaces view allows to drag the active workspace to swipe-scroll
to the next or previous workspace. While this behavior can come in handy
in general, there are good reasons to move the functionality to the
overview:
- Finding a spot on a workspace to start a drag can be hard,
especially when the workspace contains a single window
- With the new layout, workspaces have no visible border, making
it hard to predict where a drag can be initiated
- The same behavior is equally useful for other elements
So add setScrollAdjustment() to the overview, which allows setting
an adjustment controlled with swipe-scrolling (either horizontally
or vertically); only a single adjustment can be controlled at a
time. A swipe-scroll can be initiated on any part of the background that
is not occupied by a reactive actor. For cases where further control
is needed, 'swipe-scroll-start' and 'swipe-scroll-end' signals are
emitted.
https://bugzilla.gnome.org/show_bug.cgi?id=635034
a6da22fa70