gistfile1.rb

    def tag_user_id_link(body)
      tag = body.buffer.create_tag('_user_id_link',
                                   'foreground' => 'blue',
                                   "underline" => Pango::UNDERLINE_SINGLE)
      tag.signal_connect('event'){ |this, textview, event, iter|
        result = false
        if(event.is_a?(Gdk::EventButton)) and
            (event.event_type == Gdk::Event::BUTTON_RELEASE) and
            not(textview.buffer.selection_bounds[2])
          if (event.button == 1)
            #'http://twitter.com/'+user[:idname]->'http://twitter.com/#!/'+user[:idname]へ変更
            Gtk::openurl('http://twitter.com/#!/'+user[:idname]) end
        elsif(event.is_a?(Gdk::EventMotion))
          body.set_cursor(textview, Gdk::Cursor::HAND2) end
        result }
      tag end }