+ /// return the on-screen size of this length
+ /*
+ * This is a wrapper around Length::inPixels that uses the
+ * bufferview width as width and the EM value of the default
+ * document font.
+ */
+ int inPixels(Length const & len) const;
+
+ /** Return the number of pixels equivalent to \c pix pixels at
+ * 100dpi and 100% zoom.
+ */
+ int zoomedPixels(int pix) const;
+