# File mrplot/magick.rb, line 74
    def placeholder(rect)
      # Set color/stroke
      @gc.fill_opacity(0)
      @gc.stroke('black')
      @gc.stroke_width(1)
      
      # Draw crossed rectangle      
      p1 = transform(rect.origin)
      p2 = transform(rect.extent)
      
      @gc.rectangle(p1.x,p1.y, p2.x,p2.y)
      @gc.line(p1.x,p1.y, p2.x,p2.y)
      @gc.line(p1.x,p2.y, p2.x,p1.y)
    end