# File rbSnack/tkSnackUtil.rb, line 406
   def autoBoxPlacement
       return if @boxes.length==0
       w = 0.8 * @canvas.width/@boxes.length
       h = 0.8 * @canvas.height/@boxes.length
       x = 0.9 * @canvas.width
       y = 0.9 * @canvas.width
       @boxes.each{ |box| box[0]=x; box[1]=y; x+=w; y+=h; }
   end