Get event when window has been closed

Question

I try to automate some repetitive tasks with xdotool. In one task I want to automatically save a website to a file. While printing on Firefox there is a progress bar which looks like this:

I want to start a new task when the printing window has been closed (it closes automatically after saving the file). My current workaround is to use something like sleep 10 to prevent the next task from beginning to early. How can I get the event that the printing window has been closed?

(I am a Linux Mint user.)

Bash script

# Get window id (Firefox)
FIREFOX_ID=$(xdotool search --name "Mozilla Firefox" | head -n1)
# Activate window (Firefox)
xdotool windowactivate "$FIREFOX_ID"
# Open print dialog
xdotool key "ctrl+p"
# Get window id (print dialog)
DIALOG_ID=$(xdotool search --name "Print") # Change name to your language
# Activate window (print dialog)
xdotool windowactivate "$DIALOG_ID"
# Click "Print" button
xdotool mousemove 1240 790 click 1 # Change coordinates to yours

Answer 1

I think you could just check for the "Printing" window. Take your code as above, and let's focus on the moment you click print:

# Click "Print" button
xdotool mousemove 1240 790 click 1 # Change coordinates to yours

After that, you will have a "Printing" ("Drucken") progress box appear. Let's just check for its existence before moving on:

#sleep 1 second to allow printing to start - a pure safety measure
sleep 1
#check for printing progress window until failed
while (xdotool search --name "Printing") ; do
  sleep 0.1
done
<next command>

I.e. as long as there is a "printing" dialogue, do the while-loop will run and block the next command.

---

Regarding the wait command:

This does not apply here, as xdotool activates processes outside the shell script. Nevertheless it is simply used to ensure that a process is being waited for to finish:

 #!/bin/bash
 do_some_command & wait