an class='id identifier rubyid_y'>y</span> <span class='op'>-</span> <span class='ivar'>@source_y</span><span class='rparen'>)</span> <span class='op'>*</span> <span class='id identifier rubyid_y_zoom'>y_zoom</span><span class='rparen'>)</span> <span class='op'>+</span> <span class='ivar'>@y</span><span class='comma'>,</span>
      <span class='id identifier rubyid_label'>label</span><span class='period'>.</span><span class='id identifier rubyid_text'>text</span><span class='period'>.</span><span class='id 