powerbar-demo

#!/usr/bin/env ruby

require 'rubygems'
require 'powerbar'
require 'logger'

# DEMO 1
def demo_1
  total = 100000
  step = 1000

  p = PowerBar.new

  # This is how you alter the settings.
  # (see the source-code for all available settings)
  p.settings.tty.finite.show_eta = true

  (0..total).step(step).each do |i|
    p.show({:msg => 'DEMO 1 - Ten seconds of progress', :done => i, :total => total})
    sleep 0.1
  end
  
  # close(true) will set the bar to 100% before closing.
  # use this when you are sure your operation has finished but
  # for some reason 'done' may still be smaller than 'total'.
  #
  # this is not necessary in this example, and usually a bad idea,
  # but demonstrated here so you know it exists.
  p.close(true)
end

# DEMO 2
def demo_2
  total = 100000
  step = 1000
  text = " "*30 + "Need to change text in mid-progress?     No Problemo!" +
         " "*5 + "As seen in: DEMO 2 - Scrolling madness"
  p = PowerBar.new
  j = 0
  (0..total).step(step).each do |i|
    woah = sprintf('%-26s', text[j%text.length..j%text.length+25])
    p.show({:msg => woah, :done => i, :total => total})
    j += 1
    sleep 0.1
  end
  p.close
end

# DEMO 3
def demo_3
  total = 100000
  step = 1000
  text = "DEMO 3 - Don't sweat your message width too much, we can squeeze it some"
  p = PowerBar.new
  j = 0
  (0..total).step(step).each do |i|
    woah = text[0..j]
    p.show({:msg => woah, :done => i, :total => total})
    j += 1
    sleep 0.1
  end
  p.close
end

# DEMO 4
def demo_4
  total = 100000
  step = 1000
  text = "\e[0mDEMO 4 - Colors!"
  interstitial = [
    "Oh, btw, know what?\n",
    "You may use PowerBar#print to print messages while the bar is running.\n",
    "Awesome, right?\n"
  ]
  p = PowerBar.new
  p.settings.tty.finite.template.main = \
        "${<msg>} ${<bar> }\e[0m${<rate>/s} \e[33;1m${<percent>%} " +
        "\e[36;1m${<elapsed>}\e[31;1m${ ETA: <eta>}"
  p.settings.tty.finite.template.padchar = "\e[30;1m#{p.settings.tty.finite.template.padchar}"
  p.settings.tty.finite.template.barchar = "\e[34;1m#{p.settings.tty.finite.template.barchar}"
  p.settings.tty.finite.template.exit = "\e[?25h\e[0m"  # clean up after us
  p.settings.tty.finite.template.close = "\e[?25h\e[0m\n" # clean up after us
  p.settings.tty.finite.output = Proc.new{ |s|
    # The default output-function truncates our
    # string to enable the "squeezing" as seen in the
    # previous demo. This doesn't mix so well with ANSI-colors,
    # thus if you want to use colors you'll have to make the
    # output-function a little more naive. Like this:
    $stderr.print s
  }
  j = 0
  (0..total).step(step).each do |i|
    p.show({:msg => text, :done => i, :total => total})
    j += 1
    if 0 == j % 25
      p.print interstitial.shift
    end
    sleep 0.1
  end
  p.close
end

# DEMO 5
def demo_5
  total = 100000
  step = 1000
  text = "DEMO 5 - When total is :unknown then we only display what we know"
  p = PowerBar.new
  j = 0
  (0..total).step(step).each do |i|
    p.show({:msg => text, :done => i, :total => :unknown})
    j += 1
    sleep 0.1
  end
  p.close
end

# DEMO 6
def demo_6
  total = 100000
  step = 1000
  text = "DEMO 6 - Still :unknown, now with a different template"
  p = PowerBar.new
  p.settings.tty.infinite.template.main = \
      '${<msg>} > ${Rate: <rate>/s, }elapsed: ${<elapsed>}'
  j = 0
  (0..total).step(step).each do |i|
    p.show({:msg => text, :done => i, :total => :unknown})
    j += 1
    sleep 0.1
  end
  p.close
end


# DEMO 7
def demo_7
  total = 100000
  step = 1000
  text = "DEMO 7 - Forcing notty mode"
  p = PowerBar.new
  p.settings.force_mode = :notty
  j = 0
  (0..total).step(step).each do |i|
    p.show({:msg => text, :done => i, :total => total})
    j += 1
    if j == 60
      p.print "Hint: Of course PowerBar#print also works when in :notty-mode\n"
    end
    sleep 0.1
  end
  p.close
end

# DEMO 8
def demo_8
  total = 100000
  step = 1000
  log = Logger.new(STDOUT)
  text = "DEMO 8 - Forcing notty mode and using a logger"
  p = PowerBar.new
  p.settings.force_mode = :notty
  p.settings.notty.finite.output = Proc.new { |s|
    log.debug(s.chomp) unless s == ''
  }
  j = 0
  (0..total).step(step).each do |i|
    p.show({:msg => text, :done => i, :total => total})
    j += 1
    if j == 60
      p.print "Hint: Yes, PowerBar#print also works here. ;)\n"
    end
    sleep 0.1
  end
  p.close
end

# DEMO 9
def demo_9
  total = 100000
  step = 1000

  puts "DEMO 9 - No output by PowerBar."
  puts "Here we use it to collect stats silently, and then we roll our own output:\n-"
  p = PowerBar.new
  j = 0
  (0..total).step(step).each do |i|
    # update() does not output anything, it only updates (who would've guessed!)
    p.update({:done => i, :total => total})
    j += 1
    if 0 == j % 50
      puts "elapsed is: #{p.elapsed}, humanized elapsed is: #{p.h_elapsed}"
      puts "percent is: #{p.percent}, humanized percent is: #{p.h_percent}"
      puts "eta is: #{p.eta}, humanized eta is: #{p.h_eta}"
      puts "done is: #{p.done}, humanized done is: #{p.h_done}"
      puts "total is: #{p.total}, humanized done is: #{p.h_total}"
      puts "total is: #{p.total}, humanized done is: #{p.h_total}"
      puts "bar is: #{p.bar}"
      puts "-"
    end
    sleep 0.1
  end
  #p.close  # no need to close this one
end

# DEMO 10
def demo_10
  total = 100000
  step = 1000
  text = " " * 30 + "DEMO 10 - OMGWTFBBQ!"
  p = PowerBar.new
  p.settings.tty.finite.template.padchar = "\e[30;1m#{p.settings.tty.finite.template.padchar}"
  p.settings.tty.finite.template.barchar = "\e[34;1m#{p.settings.tty.finite.template.barchar}"
  p.settings.tty.finite.output = Proc.new{ |s| $stderr.print s }
  j = 0
  total = 300000000
  step = 1000000
  
  spin = ')|(|'
  spun = ',.oO^`^Oo'
  
  (0..total).step(step).each do |i|
    p.send(:state).scope = nil # omghax, don't try this at home!
    wtf_range = (j % text.length)..((j % text.length) + 25)
    wtf = sprintf('%-26s', text[wtf_range])
    wtf.gsub!(/./) { |char| rand(2).zero? ? char.downcase : char.upcase }
    p.show(
        :msg => wtf,
        :done => i,
        :total => total,
        :settings => {
          :tty => {
            :finite => {
              :template => {
                :barchar => "\e[36;1m#{spin[j%spin.length..j%spin.length]}",
                :padchar => "\e[0;34m#{spun[j%spun.length..j%spun.length]}",
                :main => "\e[#{rand(1)};3#{rand(7)}m${<msg>}\e[0m "+
                         "\e[0m${<bar> }\e[0m${<rate>/s} "+
                         "\e[33;1m${<percent>%} " +
                         "\e[36;1m${<elapsed>}\e[31;1m${ ETA: <eta>}",
                :exit => "\e[?25h\e[0m",
                :close => "\e[?25h\e[0m\n"
              }
            }
          }
        }
    )
    j += 1
    sleep 0.1
  end
  p.wipe
  puts "Thanks for watching! ;-)"
end

begin
  method("demo_#{ARGV[0]}".to_sym).call
rescue
  (1..10).each do |i|
    method("demo_#{i}".to_sym).call
    puts "---" 
    sleep 1
  end
end