There are a few events that occur at the window level - namely moving, resizing and closing.
Window Moving & Resizing
We can create a handler for when the window is moved and resized by binding to the
import tkinter root = tkinter.Tk() def configure_handler(event): print(event) root.bind("<Configure>", configure_handler) root.mainloop()
Now every time we move the window we get output with the new location information for our window:
<Configure event x=136 y=53 width=404 height=295> <Configure event x=136 y=53 width=456 height=310> ...
Note that widgets can also bind to the
<Configure> event to get information about
when their size and shape changes.
The application window closing is not an
Event proper but rather a
This is an event-adjacent concept which uses slightly different syntax. We can bind to it using
root.protocol("WM_DELETE_WINDOW", window_close_handler). Note that protocols are intercepted
(not propagated) so we must be sure to destroy the object manually to ensure our window works as
expected. We can use this protocol to prompt the user to confirmt they want to exit. This can be used in
case the user has unsaved work or something similar.
import tkinter from tkinter import messagebox root = tkinter.Tk() def window_exit(): close = messagebox.askyesno("Exit?", "Are you sure you want to exit?") if close: root.destroy() root.protocol("WM_DELETE_WINDOW", window_exit) root.mainloop()