So designers can tweak the marks and developers can see how a discontinuos scale is implemented.
https://bugzilla.gnome.org/show_bug.cgi?id=741117
eec9a74 widget-factory: Add a discontinuous GtkScale with marks
demos/widget-factory/widget-factory.ui | 32 +++++++++++++++++++++++++++++++-
1 file changed, 31 insertions(+), 1 deletion(-)
Upstream: git.gnome.org