Start Plex if not running. Make fullscreen if running windowed. Quit if running fullscreen.

Plex Toggle.scpt

-- Start Plex if not running. Make fullscreen if running windowed. Quit if running fullscreen.
-- By Henrik Nyh <http://henrik.nyh.se> 2009-11-22 under the MIT License.
-- Some code from http://forums.plexapp.com/index.php?/topic/8325-applescript-focusfullscreen-plex/

tell application "Plex"
	-- "if it is running" is probably Snow Leopard only.
	if it is running then
		
		tell application "System Events" to tell process "Plex"
			set isFullscreen to position of window 1 is {0, 0}
		end tell
		
		if isFullscreen then
			quit
			return
		end if
		
	end if
	
	activate
	tell application "System Events" to tell process "Plex"
		set frontmost to true
		tell menu "View" of menu bar 1 to click menu item "Enter Full Screen"
	end tell
	
end tell