Checking if a process has a window

Question

In my Go code, I'm starting an external GUI application (Firefox), and I'm trying to make it the front window (the top most window). After trying robotgo , I found out that it didn't work because when I called ActivePID , the window still hasn't loaded, so there wasn't a window for robotgo to set to top-most.

How can I detect when Firefox has loaded it's GUI? (in a cross-platform way)

cmd := exec.Command("firefox")
cmd.Start()
robotgo.ActivePID(int32(cmd.Process.Pid))
cmd.Wait()

Answer 1

If anyone also comes across this problem, I found out that robotgo has an API called robotgo.GetPID , which gets the process id of the current active window!

That means that we can repeatedly check if robotgo.GetPID returns our target process id or not:

for int32(processID) != robotgo.GetPID() {
    robotgo.ActivePID(int32(processID))
}