Hello,
from the manual
(https://developer.gnome.org/gtk3/stable/GtkWidget.html#GtkWidget-key-press-event),
the signature of key-press-event handlers is:
```
gboolean
user_function (GtkWidget *widget,
GdkEvent *event,
gpointer user_data)
```
From the same manual:
Dear all, thanks for reading this,
I recently updated GTK from 3.22.24 to 3.22.30 (Fedora 27 to Fedora 28
update),
doing so something changed in behaviour of the program I am working on
(C code) at runtime.
In my program I create a GtkMenuBar widget, using the code:
GtkWidget * win =
