Command-line progress indicators

ntk () — Wed, 04 Apr 2007 18:22:50 GMT

... just some proof-of-concept snippets ...

inspired by: http://www.ruby-forum.com/topic/87404





# move cursor to beginning of line

cr = "\r"           





# ANSI escape code to clear line from cursor to end of line

# "\e" is an alternative to "\033"

# cf. http://en.wikipedia.org/wiki/ANSI_escape_code



clear = "\e[0K"     



# reset lines

reset = cr + clear







#-------------------------------- Example 1 --------------------------------





(1..100).each do |i| 

  print "#{reset}#{i}%"

  sleep(0.08)

  $stdout.flush

end



print "#{reset}"     # clear current line



$stdout.flush

puts "done"







#-------------------------------- Example 2 --------------------------------





chars = [ "|", "/", "-", "\\" ]



# 7 turns on reverse video mode, 31 red , ...

n = 31



str = "#{reset}\e[#{n};1m"   





(1..100).each do |i| 



   case i

      when   0..10    then print "#{str}#{chars[0]}"

      when  10..20    then print "#{str}#{chars[1]}"

      when  20..30    then print "#{str}#{chars[2]}"

      when  30..40    then print "#{str}#{chars[3]}"

      when  40..50    then print "#{str}#{chars[0]}"

      when  50..60    then print "#{str}#{chars[1]}"

      when  60..70    then print "#{str}#{chars[2]}"

      when  70..80    then print "#{str}#{chars[3]}"

      when  80..90    then print "#{str}#{chars[0]}"

      when  90..100   then print "#{str}#{chars[1]}"

   end



   sleep(0.1)

   $stdout.flush



end



print "\e[0m"

print "#{reset}" 



$stdout.flush

puts "done"







#-------------------------------- Example 3 --------------------------------





MAX = 80 



$stdout.sync = true     # alternative to $stdout.flush below



10.times do

   foo_string = Time.now.to_s

   s = foo_string[0..MAX].center(MAX)   # or rjust or ljust 

   print cr + s 

   #$stdout.flush 

   sleep(1.1)

end



print "\e[0m" 

print "#{reset}" 



$stdout.flush

puts "done"

Progress Indicator Helper

burnto (Brent Fitzgerald) — Wed, 14 Feb 2007 03:17:10 GMT

Use the optional options param to pass custom show or hide functions. Provides functions show/hide.



function ProgressIndicator(element, options) {

        var element = $(element);

        var my_options = {show:Element.show, hide:Element.hide};

        Object.extend(my_options, options || {});

        this.show = function() { my_options.show(element) }

        this.hide = function() { my_options.hide(element) }

        this.hide();

}

Example



var p = new ProgressIndicator($("my_element"));

p.show();



var q = new ProgressIndicator("my_other_element",

                             {show: Effect.Appear, 

                              hide:Effect.Fade});

q.show();

$("my_other_element").onclick = q.hide;

Requires prototype for a few things.

DZone Snippets: progress code

Command-line progress indicators

Progress Indicator Helper