| Usually, that sort of thing is done by connecting to the
    enter-notify-event and leave-notify-event signals.  You might have
    to add those events to the to the widget event mask with something
    like: gtk_widget_add_events (<widget>, GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK ); But I have no idea if this will work on Wayland. On 10/21/16 10:06, Konstantin P. wrote: 
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