I want app B to run when I open app A and I want app B to quit when I quit app A

Question

Hello
I have an idle script that handles iTunes. I want the script to run when I run iTunes and quit when I quit iTunes.
At the moment my workaround are two separate scripts, "zactivate" & "zquit"
  activate application "iTunes"
  activate application "albumArt"
quit application "albumArt"
quit application "iTunes"
I use spotlight to launch these but I would like to open and quit iTunes "normally" and have the same effect as the above scripts.
Please help me. I am a novice.

Answer 1

Normally AppleScript will not run automatically when you open or quit any given app - they're completely unrelated events.
However, if you already have an idle script, then you can amend your script to periodically poll to see if app1 is running and then launch/quit app2 based on the results. Something like:
on idle
  tell application "System Events" to set processList to name of every application process
  if processList contains "iTunes" then
  -- iTunes is running, so make sure your secondary App is:
  if processList does not contain "albumArt" then
  launch application "AlbumArt"
  end if
  else
  -- iTunes is not running, so quit the secondary app
  if processList contains "albumArt" then
  tell application "AlbumArt" to quit
  end if
  end if
  return 30 -- check again in 30 seconds
end idle
The basic idea here is to periodically check to see if iTunes is running. Based on that, either launch or quit albumArt to keep them in sync.
Lowering the return value from the above 30 seconds will have the check performed more frequently. You can run it as often as you like based on how long you're prepared to tolerate the apps being in a different run state.