Tkinter lag when file encrypting

Question

I have made a simple encryption app, here's the code - https://codeshare.io/ZJ7qJn

But when I press encrypt my tkinter app lags and says Not Responding and so I can't press anything within the tkinter app, but it does complete the encryption process.

Is there any way to make it lag-free?

your encryption function is probably blocking the `.mainloop`, you probably want to do the encryption in another thread, also code should be provided in the question as text and as a [mre] — Matiiss, Nov 08 '21 at 18:13
Does this answer your question? [How do you run your own code alongside Tkinter's event loop?](https://stackoverflow.com/questions/459083/how-do-you-run-your-own-code-alongside-tkinters-event-loop) — Matiiss, Nov 08 '21 at 18:14
You are going for 10k iterations which will take a lot of processing and probably isn't gaining much in this amount. Anyway, cryptography takes some time anyway. You should go with a different process or at least a thread here. — Thingamabobs, Nov 08 '21 at 18:36

score 1 · Accepted Answer · answered Nov 08 '21 at 21:23

Try this:

In function encfile replace the call to fiencdone() with:

    root.event_generate("<<encryption_done>>")

Add the following new function definitions after the definition of function encfile:

def run_encfile():
    from threading import Thread

    root.bind('<<encryption_done>>', encryption_done)
    Thread(target=encfile).start()

def encryption_done(*args):
    fiencdone()

Finally, change line 75 to invoke run_encfile instead of encfile:

file_enc_button = tk.Button(fibutton_frame, text='Encrypt',font='Raleway 15 bold', width=15,command=run_encfile, borderwidth=3)

This will run the encryption in a separate thread but have the call to fiencdone signaling that the encryption is complete done in the main thread, which is required since it updates the GUI.

thanks. Could you please have a look [here](https://stackoverflow.com/questions/69911786/tkinter-progressbar-for-multiprocessing) i tried everything but it doesn't seem to work. This is the last help i need please. — Sanket, Nov 10 '21 at 15:03

Tkinter lag when file encrypting

1 Answers1