在Tkinter Python中绘制光标周围定义的尺寸圆



如何在tkinter python中的光标周围绘制定义的大小圆圈?

我尝试了

canvas.config(cursor='circle')

,但它绘制了一个特定的圆圈,其大小无法更改。

您可以在tkinter中使用 Motion绑定,这会导致函数每次移动鼠标时激活:

import tkinter as tk
global circle
circle = 0
def motion(event):
    x, y = event.x + 3, event.y + 7  
    #the addition is just to center the oval around the center of the mouse
    #remove the the +3 and +7 if you want to center it around the point of the mouse
    global circle
    global canvas
    canvas.delete(circle)  #to refresh the circle each motion
    radius = 20  #change this for the size of your circle
    x_max = x + radius
    x_min = x - radius
    y_max = y + radius
    y_min = y - radius
    circle = canvas.create_oval(x_max, y_max, x_min, y_min, outline="black")
root = tk.Tk()
root.bind("<Motion>", motion)
global canvas
canvas = tk.Canvas(root)
canvas.pack()
root.mainloop()

我不建议通常使用全局变量,但是对于这样的简单程序,没关系。

您无法绘制自定义光标。您有一组非常有限的光标可供选择。

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