# File gtk/sample/gtk-demo/cairo-operator.rb, line 25 def initialize super('cairo operator') @operator = Cairo::OPERATOR_ADD set_default_size(400, 400) @drawing_area = child remove(@drawing_area) vbox = Gtk::VBox.new vbox.pack_start(@drawing_area, true, true) vbox.pack_start(operator_selector, false, false) add(vbox) end