Class: Speedometer

Inherits:
Object
  • Object
show all
Defined in:
lib/speedometer.rb

Overview

speedometer - class to track, calculate and display upload speed from an application Copyright © 2013, Tadeus Dobrovolskij This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Methods

  • new - accepts units in KB/MB/GB

  • display - displays upload speed

  • log(message) - you need to use this instead of puts

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(units = "MB") ⇒ Speedometer

Returns a new instance of Speedometer.



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# File 'lib/speedometer.rb', line 27

def initialize(units="MB")
  @start_time = Time.now
  @active = true
  @refresh_time = 1000
  if ["KB","MB","GB"].include?(units)
    @units = units
  else
    @units = "MB"
  end
end

Instance Attribute Details

#active ⇒ Object

Returns the value of attribute active.



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# File 'lib/speedometer.rb', line 25

def active
  @active
end

#refresh_time ⇒ Object

Returns the value of attribute refresh_time.



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# File 'lib/speedometer.rb', line 25

def refresh_time
  @refresh_time
end

#uploaded ⇒ Object

Returns the value of attribute uploaded.



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# File 'lib/speedometer.rb', line 25

def uploaded
  @uploaded
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/speedometer.rb', line 38

def clear
  length = `stty`
  length = length.split.last.to_i
  print "\r"
  print "#{' ' * length}"
  print "\r"
end

#display ⇒ Object 



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# File 'lib/speedometer.rb', line 46

def display
  clear
  time = Time.now
  speed = (uploaded.to_f / (time - @start_time)) / 1024
  if @units == "MB" or @units == "GB"
    speed = speed / 1024
  end
  if @units == "GB"
    speed = speed / 1024
  end
  print "#{speed.round(2)}#{@units}/s"
  sleep @refresh_time.to_f / 1000
end

#log(msg) ⇒ Object 



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# File 'lib/speedometer.rb', line 60

def log(msg)
  clear
  puts msg
  display
end