One of the new additions so far in the GTK+ 3.19 development code in the road leading to the March release of GTK+ 3.20 is a new GtkShortcutsWindow widget that landed in Git yesterday.

The GtkShortcutsWindow is a top-level window designed for showing shortchut helpers for an application, such as showing a program's keyboard shortcuts or possible gestures or other helpers. The work was spearheaded by Matthias Clasen stemming from this bug report.

Enclosed are some of the GNOME-provided examples of GtkShortcutsWindow. The new widget landed yesterday along with a new GtkShortcutsWindow demo and other additions for this help overlay support. This work will be present in the GTK+ 3.19.1 development release due out soon.

More details on GNOME's help overlay planning around GtkShortcutsWindow can be found via this GNOME Wiki page.