Screen ruler for 11.10

[H.S.Rai]

I found ScreenRuler is not there for Ubuntu 11.10. Kruler does not
have centimeters, mm and inches. I tried to install ScreenRuler, it
failed die to unmet dependencies.

screenruler depends on libgtk2-ruby; however:
  Package libgtk2-ruby is not installed.
 screenruler depends on libgconf2-ruby; however:
  Package libgconf2-ruby is not installed.
 screenruler depends on libglade2-ruby; however:
  Package libglade2-ruby is not installed.
 screenruler depends on libcairo-ruby; however:
  Package libcairo-ruby is not installed.
dpkg: error processing screenruler (--install):


Which software I ac use now?

-- 
H.S.Rai