Gtk.Label:ellipsize

"ellipsize"             Pango.EllipsizeMode                : Read / Write

The preferred place to ellipsize the string, if the label does not have enough room to display the entire string, specified as a Pango.EllipsizeMode.

Note that setting this property to a value other than Pango.EllipsizeMode.none has the side-effect that the label requests only enough space to display the ellipsis "...". In particular, this means that ellipsizing labels do not work well in notebook tabs, unless the tab's #GtkNotebook:tab-expand property is set to true. Other ways to set a label's width are Gtk.set_size_request and Gtk.Label.prototype.set_width_chars.

Since 2.6