title: Ruby Canvas (GUI)
body: <p>I need draw some lines/circles/rect/etc from ruby into something like canvas.</p>
  
  <p>I tried wxRuby and fxRuby but they are have no good examples to draw simple lines.</p>
  
  <p>Just tried to install qtruby on Windows and its fall cause of some number of errors.</p>
  
  <p>So:</p>
  
  <p>1) Which API for ruby to draw on canvas I need?
  2) Give me a little sample of it (full code please)?</p>
  
  <p>Sincerely
  Eugene</p>