# File gtk/sample/gtk-demo/drawingarea.rb, line 96
    def scribble_configure_event(widget)
      @pixmap = Gdk::Pixmap.new(self.window,
                                widget.allocation.width,
                                widget.allocation.height,
                                -1)

      # Initialize the pixmap to white
      @pixmap.draw_rectangle(widget.style.white_gc,
                             true,
                             0, 0,
                             widget.allocation.width,
                             widget.allocation.height)

      # We've handled the configure event, no need for further processing.
      return true
    end