Tkinter GUI with progress bar

Question

I have a simple Tk GUI and a long process in a function attached to a button. I want a progress bar when I click on the button, just like it starts a long process.

How can I do that? This is my current code:

from tkinter import Button, Tk, HORIZONTAL

from tkinter.ttk import Progressbar
import time


class MonApp(Tk):
    def __init__(self):
        super().__init__()

        bt1 = Button(self, text='Traitement', command=self.traitement)
        bt1.grid()
        self.progress = Progressbar(self, orient=HORIZONTAL, length=100, mode='indeterminate')
        self.progress.grid()
        self.progress.grid_forget()

    def traitement(self):
        self.progress.grid()
        self.progress.start()
        time.sleep(15) 
        ## Just like you have many, many code lines...

        self.progress.stop()


if __name__ == '__main__':
    app = MonApp()
    app.mainloop()

How can I put a progress bar in that application?

Answer 1

You can find ttk.Progressbar at tkdocs

import time
from tkinter import *
from tkinter.ttk import *

tk = Tk()
progress = Progressbar(tk, orient=HORIZONTAL, length=100, mode='determinate')


def bar():
    progress['value'] = 20
    tk.update_idletasks()
    time.sleep(1)
    progress['value'] = 50
    tk.update_idletasks()
    time.sleep(1)
    progress['value'] = 80
    tk.update_idletasks()
    time.sleep(1)
    progress['value'] = 100

progress.pack()
Button(tk, text='foo', command=bar).pack()
mainloop()

It's better to use threading and run your code in another thread.

Like this:

import threading
import time
from tkinter import Button, Tk, HORIZONTAL
from tkinter.ttk import Progressbar

class MonApp(Tk):
    def __init__(self):
        super().__init__()

        self.btn = Button(self, text='Traitement', command=self.traitement)
        self.btn.grid(row=0, column=0)
        self.progress = Progressbar(self, orient=HORIZONTAL, length=100, mode='indeterminate')

    def traitement(self):
        def real_traitement():
            self.progress.grid(row=1,column=0)
            self.progress.start()
            time.sleep(5)
            self.progress.stop()
            self.progress.grid_forget()

            self.btn['state']='normal'

        self.btn['state']='disabled'
        threading.Thread(target=real_traitement).start()


if __name__ == '__main__':
    app = MonApp()
    app.mainloop()