intelBrightness_KDEEventListener

#!/bin/bash

exec 3>&1 # creates 3 as alias for 1
run_in_subshell() { # just shortcut for the two cases below
 dbus-monitor "type='signal',interface='org.kde.Solid.PowerManagement.Actions.BrightnessControl'"
}

nextValueIs=""
brightness=""
brightnessMax=""
while read line; do
#  echo got: $line
  if [[ $line == *"brightnessMaxChanged" ]]
  then
    nextValueIs="brightnessMax"
  elif [[ $line == *"brightnessChanged" ]]
  then
    nextValueIs="brightness"
  else
   if [[ $nextValueIs == "brightnessMax" ]]
   then
    brightnessMax=`echo "$line" | awk '{print $2}'`
   elif [[ $nextValueIs == "brightness" ]]
   then
    brightness=`echo "$line" | awk '{print $2}'`
   fi
echo $brightness und $brightnessMax
   if [ "$brightness" != "" ] && [ "$brightnessMax" != "" ]; then
    echo `bc -l <<< "$brightness/$brightnessMax"`
   fi
   nextValueIs="";
  fi

done < <(run_in_subshell)