Scrolling Progress Bar in Tkinter

have you tried ttk's determinate Progressbar? You can make the progress just continuously scroll across the bar.

for example:

#!/usr/bin/env python3import tkinterimport tkinter.ttk as ttkroot = tkinter.Tk()frame = ttk.Frame()pb = ttk.Progressbar(frame, length=300, mode='determinate')frame.pack()pb.pack()pb.start(25)root.mainloop()

I know its an old question, but I have found a way to do this for anyone else writing tkinter.

I've been working on a tkinter app for a bit now and have determined that to handle tkinter objects, you absolutely need a separate thread. Although it is apparently frowned upon to handle tkinter objects via something else than the mainloop() method, it has been working well for me. I've never had a main thread is not in main loop error and never experienced objects that didn't update correctly.

I edited Corey Goldberg's code a bit and got it working. Here's what I got (some explanations in the comments).

import tkinterimport tkinter.ttk as ttkimport threadingdef mainProgram(): # secure the main program initialization in its own def    root = tkinter.Tk()    frame = ttk.Frame()    # You need to use indeterminate mode to achieve this    pb = ttk.Progressbar(frame, length=300, mode='indeterminate')    frame.pack()    pb.pack()    # Create a thread for monitoring loading bar    # Note the passing of the loading bar as an argument    barThread = threading.Thread(target=keepLooping, args=(pb,))    # set thread as daemon (thread will die if parent is killed)    barThread.daemon=True    # Start thread, could also use root.after(50, barThread.start()) if desired    barThread.start()    pb.start(25)    root.mainloop()def keepLooping(bar):    # Runs thread continuously (till parent dies due to daemon or is killed manually)    while 1:        """        Here's the tricky part.        The loading bar's position (for any length) is between 0 and 100.        Its position is calculated as position = value % 100.            Resetting bar['value'] to 0 causes it to return to position 0,        but naturally the bar would keep incrementing forever till it dies.        It works, but is a bit unnatural.        """        if bar['value']==100:            bar.config(value=0) # could also set it as bar['value']=0    if __name__=='__main__':    mainProgram()    

I've added if __name__=='__main__': because I feel it defines the scope a bit better.

As a side note I've found that running threads with while 1: will crank my CPU at about 20-30% usage for that one thread in particular. It's easily solvable by importing time and using time.sleep(0.05) thereafter significantly lowering the CPU usage.

Tested on Win8.1, Python 3.5.0.