Widget.grabFocus

Causes widget to have the keyboard focus for the [gtk.window.Window] it's inside.

If widget is not focusable, or its vfuncGtk.Widget.grab_focus implementation cannot transfer the focus to a descendant of widget that is focusable, it will not take focus and false will be returned.

Calling [gtk.widget.Widget.grabFocus] on an already focused widget is allowed, should not have an effect, and return true.