为什么我的Tkinter窗口不会移动超过1个像素？

Question

I am trying to make a tkinter window bounce around the screen like a ball in Pong, but it will only move 1 pixel in each direction and back again. What have I done wrong?

main.py:

import tkinter
from time import sleep

window = tkinter.Tk()

screen_width = window.winfo_screenwidth()
screen_height = window.winfo_screenheight()

window.title('VIRUS.EXE')

width, height = 300, 150
x, y, = 0, 0

x_vel = 1
y_vel = 1

while True:

    sleep(0.1)

    if x + width >= screen_width or x <= 0:
        x_vel = -x_vel

    if y + width >= screen_height or y <= 0:
        y_vel = -y_vel

    x += x_vel
    y += y_vel

    window_string = str(width) + 'x' + str(height) + '+' + str(x) + '+' + str(y)

    window.geometry(window_string)

    window.update()

window.mainloop()

Answer 1

Try with + instead of -

if x + width >= screen_width or x <= 0:
    x_vel = +x_vel

if y + width >= screen_height or y <= 0:
    y_vel = +y_vel

Edit: this may point you in the right direction:

if x <= screen_width or x <= 0:
    x_vel = +x_vel
    x += x_vel

if y <= (screen_height -200)or y <= 0:
    y_vel = +y_vel
    y += y_vel