Python Tkinter 鼠标指针无法悬停在按钮上

Binding Motion with Root vs Other Widgets:

在试用了您的代码之后，我做了以下观察:

1. 当Motion事件绑定到root时，(event.x, event.y)返回窗口中任何像素相对于像素所在的小部件的坐标.相应小部件(不是root)的左上角被认为是(0，0).
2. 如果将Motion事件绑定到特定小部件，则仅当像素存在于小部件directly内时，(event.x, event.y)才会返回像素(相对于小部件)的坐标.如果将鼠标悬停在子部件上，则不会打印任何内容.

解决方案:

现在，说到你的问题，当鼠标悬停在按钮上时，你不能直接从(event.x, event.y)计算画布坐标.您必须进行以下转换.

window_coords = topleft_button_coordinates + (event.x, event.y)
canvas_coords = canvas.canvasx(window_coords.x), canvas.canvasy(window_coords.y)

只有当坐标相对于按钮时，才能执行上述转换.可以使用event.widget属性判断事件是否由按钮触发.

按钮左上角的坐标(相对于画布)可以使用.winfo_x()和.winfo_y()获得.

Working Code:

import tkinter as tk
root = tk.Tk()

def motion(event):
    global button
    convx, convy = event.x, event.y
    if event.widget == button:
        convx, convy = button.winfo_x() + event.x, button.winfo_y() + event.y
    x, y = window_canvas.canvasx(convx), window_canvas.canvasy(convy)
    
    print('{}, {}'.format(x, y))

window_canvas = tk.Canvas(root, borderwidth=0, background="white", width = 300, height = 300, highlightthickness=0)
window_canvas.pack(fill='both')
window_frame = tk.Frame(window_canvas, background='red', borderwidth=0, width = 300, height = 300)
window_frame.pack()

button = tk.Button(window_frame, text='    ', borderwidth=1, highlightbackground='#9c9c9c', bg='black')
button.place(x=50, y=50)

root.bind('<Motion>', motion)
root.mainloop()