python - 绘制鼠标位置时不会触发Python activefill矩形

Question

我试图不明白为什么当我在画布中画线表示鼠标位置时，create_rectangle activefill 不起作用

有人可以解释我为什么吗？

非常感谢

from tkinter import *

def drawmouseposition(event):
    canvas.delete('mousepos')
    
    dashes = [5, 25]
    x = canvas.create_line(event.x, 0, event.x, 1000, dash=dashes, tags='mousepos')
    y = canvas.create_line(0, event.y, 1000, event.y, dash=dashes, tags='mousepos')

root = Tk()
root.rowconfigure(0, weight=1)
root.columnconfigure(0, weight=1)
    
canvas = Canvas(root)
canvas.grid(row=0,column=0, sticky="nsew", '+')

canvas.bind('<Motion>', drawmouseposition)
rec = canvas.create_rectangle(10,10,100,100, activefill='red')


root.mainloop()