class Rtui::Progress

def show_if_needed
  if @total.zero?
    cur_percentage = 100
    prev_percentage = 0
  else
    cur_percentage  = (@current  * 100 / @total).to_i
    prev_percentage = (@previous * 100 / @total).to_i
  end
  # Use "!=" instead of ">" to support negative changes
  if cur_percentage != prev_percentage || 
      Time.now - @previous_time >= 1 || @finished
    show
  end
  
end