How to draw a line following your mouse coordinates with tkinter?

Question

I have tried using the following code to draw points that create a line in tkinter:

import tkinter as tk
from time import sleep

def myfunction(event):
    x         


        

Answer 1

First, you have to bind to the "" event, which will fire every time the mouse moves.

Then you need to save the previous mouse coordinates so that you have a place to draw the line from.

Like this:

import tkinter as tk

def myfunction(event):
    x, y = event.x, event.y
    if canvas.old_coords:
        x1, y1 = canvas.old_coords
        canvas.create_line(x, y, x1, y1)
    canvas.old_coords = x, y

root = tk.Tk()

canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()
canvas.old_coords = None

root.bind('', myfunction)
root.mainloop()