+ void set_layout_ellipsize_width (int w);
+ void set_layout_font (const Pango::FontDescription&);
+ void set_text_ellipsize (Pango::EllipsizeMode);
+
+ /* Sets the text used for size request computation. Pass an
+ * empty string to return to the default behavior which uses
+ * the currently displayed text for measurement. */
+ void set_sizing_text (const std::string&);
+ const std::string& get_sizing_text () {return _sizing_text;}