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Python GUI Programming with Tkinter
book

Python GUI Programming with Tkinter

by Alan D. Moore
May 2018
Beginner to intermediate content levelBeginner to intermediate
452 pages
11h 26m
English
Packt Publishing
Content preview from Python GUI Programming with Tkinter

The after() and after_idle() methods

Tkinter widgets have two methods for adding arbitrary code to the event queue on a delay: after() and after_idle().

Basic use of after() looks like this:

import tkinter as tk
root = tk.Tk()
root.after(1000, root.quit)
root.mainloop()

In this example, we're setting root.quit to run after 1 second (1,000 milliseconds). In the background, root.quit is added to the event loop, but with the condition that it shouldn't be executed until at least 1 second from when after() was called. During that 1 second, any other events in the queue will be executed first. The command might be executed later than 1 second, depending on what's being processed already in the event queue, but no sooner.

The after_idle() method ...

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Publisher Resources

ISBN: 9781788835886Supplemental Content