Using Tkinter to draw and track a mouse pointer-CodePudding

im still learning to use Python and Tkinter. I have created a bit of code which (i thought) should create a canvas with 2 dots on and afterwards continuously printers the position of the mouse curser

    from tkinter import *
from win32 import win32gui
win = Tk()

def mouse_pos():
    flags, hcursor, (x, y) = win32gui.GetCursorInfo()
    return {"x": x, "y": y}

win.geometry("1500x900")
win.configure(background="black")

g_circle = Canvas(win, width=100, height=100, bg="black", bd=1, highlightthickness=0)
g_circle.place(x=100, y=100, in_=win)
g_circle.create_oval(50, 50, 100, 100, fill="green", offset="200,200", outline="white")

b_circle = Canvas(win, width=100, height=100, bg="black", bd=1, highlightthickness=0)
b_circle.place(x=1300, y=700, in_=win)
b_circle.create_oval(50, 50, 100, 100, fill="blue", outline="white")


while True:
    print(mouse_pos())
    win.mainloop()

I know there is an infinite loop but i am just testing it for now.

This issue is that when i run this code a TK window opens of the canvas with 2 circles and then a cmd displays an single value for x and y coordinate in text. The coordinates do not continue to update unless i close the TK window and i dont know why.

Ill post a screenshot in hopes it helps.

Any help is appreciated.

CodePudding user response：

win.mainloop() will block the while loop until the main window is closed.

You can use .after() to replace the while loop:

...
def mouse_pos():
    # no need to use external module to get the mouse position
    #flags, hcursor, (x, y) = win32gui.GetCursorInfo()
    x, y = win.winfo_pointerxy()
    print({"x": x, "y": y})
    # run mouse_pos() again 10 microseconds later
    win.after(10, mouse_pos)
...
''' don't need the while loop
while True:
    print(mouse_pos())
    win.mainloop()
'''
# start the "after loop"
mouse_pos()
win.mainloop()