<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="sonar" _label="Sonar" gl="yes">

  <command arg="--root"/>

  <video href="https://www.youtube.com/watch?v=XEL8g3qbthE"/>

  <hgroup>
   <vgroup>
    <number id="delay" type="slider" arg="--delay %"
            _label="Frame rate" _low-label="Low" _high-label="High"
            low="0" high="100000" default="30000"
            convert="invert"/>

    <number id="speed" type="slider" arg="--speed %"
             _label="Speed" _low-label="Slow" _high-label="Fast"
             low="0.1" high="8.0" default="1.0"
             convert="ratio"/>

    <select id="ping">
     <option id="sn" _label="Ping local subnet"/>
     <option id="ssh" _label="Ping known SSH hosts"
  arg-set="--ping /etc/hosts,$HOME/.ssh/known_hosts,$HOME/.ssh/known_hosts2"/>

     <option id="popular" _label="Ping Google, Facebook, etc."
       arg-set="--ping google.com,facebook.com,twitter.com,yahoo.com,flickr.com,www.apple.com,wikipedia.org,linux.org,youtube.com,disqus.com,blogger.com,wordpress.com,tumblr.com,whitehouse.gov"/>

     <option id="sim" _label="Simulation (don't ping)"
        arg-set="--ping simulation"/>
    </select>
   </vgroup>

   <vgroup>
    <number id="font" type="slider" arg="--font-size %"
            _label="Font size" _low-label="Tiny" _high-label="Huge"
            low="6.0" high="24.0" default="12"/>

    <number id="sweep" type="slider" arg="--sweep-size %"
            _label="Trail length" _low-label="Short" _high-label="Long"
            low="0.02" high="0.7" default="0.3"/>
   </vgroup>
  </hgroup>


  <hgroup>
   <string id="aname" _label="Simulation team A name" arg="--team-a-name %"/>
    <number id="acount" type="spinbutton" arg="--team-a-count %"
            _label="A count" low="1" high="100" default="4"/>
  </hgroup>

  <hgroup>
   <string id="bname" _label="Simulation team B name" arg="--team-b-name %"/>
   <number id="bcount" type="spinbutton" arg="--team-b-count %"
           _label="B count" low="1" high="100" default="4"/>
  </hgroup>

  <hgroup>
   <boolean id="dns"     _label="Resolve host names" arg-unset="--no-dns"/>
   <boolean id="times"   _label="Show ping times"    arg-unset="--no-times"/>
   <boolean id="wobble"  _label="Tilt"               arg-unset="--no-wobble"/>
   <boolean id="showfps" _label="Show frame rate" arg-set="--fps"/>
  </hgroup>

  <xscreensaver-updater />

  <_description>
A sonar display pings (get it?) the hosts on your local network, and
plots their distance (response time) from you.

The three rings represent ping times of approximately 2.5, 70 and 2,000
milliseconds respectively.

Alternately, it can run a simulation that doesn't involve hosts.

https://en.wikipedia.org/wiki/Ping_%28networking_utility%29#History

Written by Jamie Zawinski and Stephen Martin; 1998.
  </_description>
</screensaver>
